共查询到20条相似文献，搜索用时 15 毫秒
1.
Shiheng Wang Huaiqing Luo Zhenkun Gu Rudai Zhao Lutong Guo Na Wang Yunjie Lou Qun Xu Shou Peng Yiqiang Zhang Yanlin Song 《Advanced functional materials》2023,33(26):2214834
The two-step sequentially deposition strategy has been widely used to produce high-performance FAPbI3-based solar cells. However, due to the rapid reaction between PbI2 and FAI, a dense perovskite film forms on top of the PbI2 layer immediately and blocks the FAI diffusion into the bottom of the PbI2 film for a complete reaction, which results in a low-efficiency and limited reproducibility of perovskite solar cells (PSCs). Here, high-quality α-FAPbI3 perovskite films by crystal growth regulation with 4-fluorobenzamide additives is fabricated. The additives can interact with FAI to suppress the fast reaction between the FAI and PbI2 and effectively passivate the under-coordinated Pb2+ or I- defects. As a result, α-FAPbI3 perovskite films with low trap density and large grain size are prepared. The modified PSCs present a high-power conversion efficiency of 24.08%, maintaining 90% of their initial efficiency after 1400 h in high humidity. This study provides an efficient strategy of synergistic crystallization and passivation to form high-quality α-FAPbI3 films for high-performance PSCs. 相似文献
2.
Xiao Cheng Shuang Yang Bingqiang Cao Xutang Tao Zhaolai Chen 《Advanced functional materials》2020,30(4)
The efficiency of perovskite solar cells has increased to a certified value of 25.2% in the past 10 years, benefiting from the superior properties of metal halide perovskite materials. Compared with the widely investigated polycrystalline thin films, single crystal perovskites without grain boundaries have better optoelectronic properties, showing great potential for photovoltaics with higher efficiency and stability. Additionally, single crystal perovskite solar cells are a fantastic model system for further investigating the working principles related to the surface and grain boundaries of perovskite materials. Unfortunately, only a handful of groups have participated in the development of single crystal perovskite solar cells; thus, the development of this area lags far behind that of its polycrystalline counterpart. Therefore, a review paper that discusses the recent developments and challenges of single crystal perovskite solar cells is urgently required to provide guidelines for this emerging field. In this progress report, the optical and electrical properties of single crystal and polycrystalline perovskite thin films are compared, followed by the recent developments in the growth of single crystal perovskite thin films and the photovoltaic applications of this material. Finally, the challenges and perspectives of single crystal perovskite solar cells are discussed in detail. 相似文献
3.
Jia Li Herlina Arianita Dewi Hao Wang Jiashang Zhao Nidhi Tiwari Natalia Yantara Tadas Malinauskas Vytautas Getautis Tom J. Savenije Nripan Mathews Subodh Mhaisalkar Annalisa Bruno 《Advanced functional materials》2021,31(42):2103252
Recent progress of vapor-deposited perovskite solar cells (PSCs) has proved the feasibility of this deposition method in achieving promising photovoltaic devices. For the first time, it is probed the versatility of the co-evaporation process in creating perovskite layers customizable for different device architectures. A gradient of composition is created within the perovskite films by tuning the background chamber pressure during the growth process. This method leads to co-evaporated MAPbI3 film with graded Fermi levels across the thickness. Here it is proved that this growth process is beneficial for p-i-n PSCs as it can guarantee a favorable energy alignment at the charge selective interfaces. Co-evaporated p-i-n PSCs, with different hole transporting layers, consistently achieve power conversion efficiency (PCE) over 20% with a champion value of 20.6%, one of the highest reported to date. The scaled-up p-i-n PSCs, with active areas of 1 and 1.96 cm2, achieved the record PCEs of 19.1% and 17.2%, respectively, while the flexible PSCs reached a PCE of 19.3%. Unencapsulated PSCs demonstrate remarkable long-term stability, retaining ≈90% of their initial PCE when stored in ambient for 1000 h. These PSCs also preserve over 80% of their initial PCE after 500 h of thermal aging at 85 °C. 相似文献
4.
Dexin Pu Shun Zhou Hongling Guan Peng Jia Guoyi Chen Hongyi Fang Shiqiang Fu Chen Wang Hakim Hushvaktov Abduvakhid Jumabaev Weiwei Meng Xingzhu Wang Guojia Fang Weijun Ke 《Advanced functional materials》2024,34(17):2314349
The realization of efficient large-area perovskite solar cells stands as a pivotal milestone for propelling their future commercial viability. However, the upscaling fabrication of perovskite solar cells is hampered by efficiency losses, and the underlying growth mechanism remains enigmatic. Here, it is unveiled that a prevalent upscaling technology, namely blade-coating, inherently triggers top-down inhomogeneity strains, predominantly concentrated on the surface of wide-bandgap perovskite films. Through strain mitigation strategies, the perovskite films exhibit reduced halide vacancies, leading to enhanced stability and improved optoelectronic characteristics. Consequently, the blade-coated perovskite solar cells achieve minimal efficiency loss when transitioning from small-area to large-area devices, enabling the realization of 1 cm2-area 1.77 eV-bandgap cells with a remarkable efficiency of 18.71%. Additionally, the strain-relieved device exhibits an exceptional 109% retention of its initial efficiency even after 400 h of continuous operation, in stark contrast to the control device which experiences a decline to 91%. Furthermore, the resulting 4-terminal all-perovskite tandem solar cells crafted utilizing blade-coated 1.77 eV-bandgap subcells achieve a maximum efficiency of 27.64% (stabilized at 27.28%). This study not only sheds light on the intricacies of upscaling preparation techniques but also overcomes potential obstacles that can impede the trajectory toward achieving large-scale perovskite solar cells. 相似文献
5.
Zhipeng Miao Qingli Cao Sihui Peng He Zhu Fangfang Yuan Yuncai Liang Ting Zhang Rudai Zhao Pengwei Li Yiqiang Zhang Yanlin Song 《Advanced functional materials》2024,34(4):2311135
Low-dimensional (LD) perovskite has provided an exciting avenue for exploring stable perovskite solar cells (PSCs). However, PSCs based on LD perovskites still suffer from poor efficiency owing to unfavorable charge carrier dynamics. Here, cystamine (CYS) is employed as a ligand to construct LD Dion-Jacobson (LDDJ) perovskite (CYS)MAn-1PbnI3n+1 (n = 1, 2, 3…, MA: methylamine) for improving carrier properties. The disulfide bond not only changes the polarization characteristic but also increases the coupling between inorganic slabs due to the low barrier of rotation around the S-S axis, thus reducing the exciton binding energy of CYS-based LDDJ perovskite. Disulfide bonds provide a scene for charge localization in the interlayer region, which is conducive to reducing the anisotropy of charge transfer. Thanks to these merits, the (CYS)MA4Pb5I16 film delivers improved carrier diffusion length (electron for 1345 nm and hole for 950 nm) and mobility (9.23 cm2 V−1 S−1). As a result, the (CYS)(MA)4Pb5I16 PSC achieves a champion power conversion efficiency (PCE) of 16.52%, which is much higher than that of HDA and BA cations-based PSCs (HDA: 1,6-Hexanediamine, BA: Butylamine). Furthermore, the state-of-the-art device only lost 8% of its initial PCE after 1600 h in the atmosphere. 相似文献
6.
Amir Zarean Afshord Bahri Eren Uzuner Wiria Soltanpoor Salar H. Sedani Tom Aernouts Gorkem Gunbas Yinghuan Kuang Selcuk Yerci 《Advanced functional materials》2023,33(31):2301695
Wide-bandgap perovskite solar cells (WBG-PSCs), when partnered with Si bottom cells in tandem configuration, can provide efficiencies up to 44%; yet, the development of stable, efficient, and scalable WBG-PSCs is required. Here, the utility of the hybrid evaporation-solution method (HESM) is investigated to meet these demanding requirements via its unique advantages including ease of control and reproducibility. A PbI2/CsBr layer is co-evaporated followed by coating of organic-halide solutions in a green solvent. Bandgaps between 1.55–1.67 eV are systematically screened by varying CsBr and MABr content. Champion efficiencies of 21.06% and 20.35% in cells and 19.83% and 18.73% in mini-modules (16 cm2) for perovskites with 1.64 and 1.67 eV bandgaps are achieved, respectively. Additionally, 18.51%-efficient semi-transparent WBG-PSCs are implemented in 4T perovskite/bifacial silicon configuration, reaching a projected power output of 30.61 mW cm−2 based on PD IEC TS 60904-1-2 (BiFi200) protocol. Despite similar bandgaps achieved by incorporating Br via MABr solution and/or CsBr evaporation, PSCs having a perovskite layer without MABr addition show significantly higher thermal and moisture stability. This study proves scalable, high-performance, and stable WBG-PSCs are enabled by HESM, hence their use in tandems and in emerging applications such as indoor photovoltaics are now within reach. 相似文献
7.
8.
Hsiang-Lin Hsu Bing-Huang Jiang Jie-Min Lan Chien-Hsin Wu Ru-Jong Jeng Chih-Ping Chen 《Advanced Electronic Materials》2021,7(2):2000870
The passivation of surface defects at the interfaces and grain boundaries of perovskites has great potential to improve the optoelectronic properties of related devices. In this study, the small molecules LG0.5, LG1.5, and LG2.5—having precise and controllable molecular weights (various generations synthesized through click reactions) and featuring urethane, urea, and malonamide functionalities—are synthesized, and their ability to passivate the defects of perovskites are evaluated. X-ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy, and time-resolved photoluminescence spectroscopy are used to observe the interactions between the perovskites and these molecules. The embedding of LG0.5 promotes the growth of large-grain perovskite crystals, leading to increases in the intensities of the UV–vis absorption and photoluminescence spectral signals of the perovskite as well as longer carrier lifetimes. A power conversion efficiency of almost 20% for a p-i-n perovskite solar cell having the layer structure indium tin oxide/NiOx/CH3NH3PbI3 (with LG0.5)/[6,6]-phenyl C61 butyric acid methyl ester/bathocuproine/Ag is observed. This device (without encapsulation) exhibits excellent air-stability, retaining 89.8% of its initial performance after storage in an ambient environment (25 °C, 40% humidity) for over 120 d. 相似文献
9.
The recent dramatic rise in power conversion efficiencies (PCE) of perovskite solar cells has triggered intense research worldwide. However, their practical development is hampered by poor stability and low PCE values with large areas devices. Here, we developed a gas-pumping method to avoid pinholes and eliminate local structural defects over large areas of perovskite film, even for 5×5 cm2 modules, the PCE reached 10.6% and no significant degradation was found after 140 days of outdoor testing. Our approach enables the realization of high performance large-area PSCs for practical application. 相似文献
10.
A spray-coating method, named as partially overlapped spray-coating (POSC) with winding path, was developed to deposit homogenous film over large area and employed to fabricate polymer solar cell (PSC) modules. The photoactive layer consisting of the conjugated polymer PBTI3T and the fullerene derivative PCBM[70] was obtained by optimizing the ink formulations and spray-coating parameters, which determines the morphology and film thickness. The lab-scale PSC (0.09 cm2) fabricated by the POSC technique achieved a power conversion efficiency (PCE) of 6.63%, which is comparable to the spin-coated one. The POSC technique was then applied to up-scaling fabrication of PSC modules. A PCE as high as 5.27% was achieved for the module with 38.5 cm2 photoactive area, which is so far the highest one with comparable size, to the best of our knowledge. It shows the POSC technique developed in this work is very successful for fabricating high-performance PSC modules, which paves a new way for film deposition in continuous roll-to-roll production. 相似文献
11.
Jionghua Wu Yuqi Cui Bingchen Yu Kuan Liu Yiming Li Hongshi Li Jiangjian Shi Huijue Wu Yanhong Luo Dongmei Li Qingbo Meng 《Advanced functional materials》2019,29(49)
The mixed halide perovskites have become famous for their outstanding photoelectric conversion efficiency among new‐generation solar cells. Unfortunately, for perovskites, little effort is focused on stress engineering, which should be emphasized for highly efficient solar cells like GaAs. Herein, polystyrene (PS) is introduced into the perovskite solar cells as the buffer layer between the SnO2 and perovskite, which can release the residual stress in the perovskite during annealing because of its low glass transition temperature. The stress‐free perovskite has less recombination, larger lattices, and a lower ion migration tendency, which significantly improves the cell's efficiency and device stability. Furthermore, the so‐called inner‐encapsulated perovskite solar cells are fabricated with another PS capping layer on the top of perovskite. As high as a 21.89% photoelectric conversion efficiency (PCE) with a steady‐state PCE of 21.5% is achieved, suggesting that the stress‐free cell can retain almost 97% of its initial efficiency after 5 days of “day cycle” stability testing. 相似文献
12.
Qi Song Chunjun Liang Huimin Zhang Chao Ji Mengjie Sun Fulin Sun Xiping Jing Fangtian You Yanwu Lu Zhiqun He 《Advanced Electronic Materials》2019,5(10)
Methylammonium lead iodide (MAPbI3) perovskite is manipulated through an additional organic‐solvent‐rinsing process during an intermediate film fabrication stage. This additional process includes low‐temperature preannealing following by rinsing the films using isobutyl alcohol (IBA) before final annealing. This partially dissolves the small crystals in the perovskite intermediate and reduces nucleation density. The small crystals recrystallize into larger sizes via a dissolution–crystallization mechanism, leading to a reduction in the grain boundaries and interfacial defects. Preannealing is also crucial in solubility control and for tuning the crystallization. Crystal‐size‐dependent optical band gaps may be attributed to a weak quantum confinement effect. Excess PbI2 residue is induced at the perovskite surface thanks to the selective solubility of IBA, which improves the passivation of the perovskite surface. A synergistic improvement in grain size and in PbI2 residue leads to substantial enhancement in device performance. The power conversion efficiency of an optimized photovoltaic device reaches 18.47%, which is more than a 15% increase compared to a control device. 相似文献
13.
《Advanced Electronic Materials》2017,3(2)
Perovskite solar cells have been shown to be of extraordinary radiation hardness, considering high energetic (68 MeV) proton irradiation with doses up to 1013 p cm−2. In this study electrical and photoelectrical properties of perovskite solar cells with and without proton irradiation are analyzed in detail. The results reveal that proton irradiation improves the open circuit voltage, fill factor, and recombination lifetime of photogenerated charge carriers in perovskite solar cells. These enhancements are mainly a result of the lower nonradiative recombination losses in the proton irradiated devices. The proton treatment creates shallow traps, which may be associated with the proton induced point defects due to the displacements of atoms in the inorganic Pb–I framework, which act as unintentional doping sources and partially compensate deep traps originated from the photodegradation of methylammonium molecules. 相似文献
14.
Dalin Li Ning Li Can Zou Yu Zhong Yaqian Qu Shuang Yang Lei Wang Yimu Chen Xiao Cheng Xutang Tao Osman M. Bakr Zhaolai Chen 《Advanced functional materials》2024,34(32):2313693
The lateral device structure for perovskite solar cells (PSCs) has garnered significant attention, primarily due to its elimination of the need for expensive transparent electrodes. However, the performance of lateral devices, which are more sensitive to crystal quality and charge carrier transport bottlenecks, has lagged far behind the predominant vertical PSCs. Herein, by modulating the crystal nucleation and growth processes of thin FA0.75MA0.25PbI3 (FA = formamidinium; and MA = methylammonium) single crystals, crystal quality and carrier transport are improved, resulting in a power conversion efficiency (PCE) of 12.64%, a record for lateral PSCs. Investigation of the device's stability reveals that iodide ion migration is suppressed due to a reduction in the iodide vacancy concentration combined with weak interface iodide ion migration. It is shown that the latter effect is a result of the perpendicular direction of the ion migration and the electric field in the lateral PSCs. Consequently, these lateral single-crystal PSCs display remarkable operational stability, retaining 100% of their initial PCE after 1200 h of steady-state output at the maximum power point voltage (Vmpp) under 1 sun illumination. This work highlights the advantages of lateral single-crystal devices and their potential to address key ion migration issues of PSCs. 相似文献
15.
Weiyin Gao Changshun Chen Chenxin Ran Hao Zheng He Dong Yingdong Xia Yonghua Chen Wei Huang 《Advanced functional materials》2020,30(34)
Pb‐based metal halide perovskites (MHPs) have emerged as efficient light absorbers in third‐generation photovoltaic devices, and the latest certified power conversion efficiency (PCE) of Pb‐based perovskite solar cells (PSCs) has reached 25.2%. Despite great progress, Pb‐based MHPs are affected by toxicity, which hinders their market entry in a potential future large‐scale commercialization effort. Therefore, the exploration of Pb‐free MHPs has become one of the alternative solutions sought in the community. Among all the Pb‐free MHPs, Sn‐based MHPs show great promise owing to their similar or even superior theoretical optoelectronic characteristics. After several years of development, the PCE of Sn‐based PSCs has recently been approaching 10%, with the breakthroughs mainly coming from A‐site cation engineering of Sn‐based MHPs. In this review, the crucial status of A‐site cation engineering strategies in the research of Sn‐based PSCs is highlighted. First, the way the features of A‐site cation influence the structure and characteristics of MHPs is systematically demonstrated. Then, the state‐of‐the‐art developments, focusing on A‐site cation engineering of Sn‐based MHPs, are comprehensively reviewed. Subsequently, the current challenges and opportunities for further boosting the performance of Sn‐based PSCs are discussed. Finally, conclusions and perspectives on the promising Sn‐based optoelectronic devices are discussed. 相似文献
16.
Valentina Larini Changzeng Ding Fabiola Faini Giovanni Pica Giovanna Bruni Lorenzo Pancini Silvia Cavalli Matteo Manzi Matteo Degani Riccardo Pallotta Michele De Bastiani Chang-Qi Ma Giulia Grancini 《Advanced functional materials》2024,34(50):2306040
Transparent conductive oxide (TCO)-coated glasses are the most expensive and environmentally impacting components of perovskite solar cells (PSCs), comprising 56% of the total cost of a perovskite module and 96% of its carbon footprint. Thus, recycling TCO glasses from end-of-life perovskite modules can reduce both their levelized cost of electricity and energy payback time. In this work, tin oxide (SnO2)-coated indium tin oxide glasses are refurbished from n-i-p PSCs employing dimethyl sulfoxide as a green solvent to dissolve the upper layers of the devices. Employing the recovered substrates, new-generation PSCs are produced, which retain the same champion power conversion efficiency (PCE) of 22.6% as fresh samples and display an even higher average PCE. This performance enhancement is investigated through compositional and electrical analyses that demonstrate that the proposed recycling protocol induces beneficial surface modifications on the SnO2/perovskite interface and trap passivation, boosting charge extraction. 相似文献
17.
Artem Musiienko Davide Raffaele Ceratti Jindřich Pipek Mykola Brynza Hassan Elhadidy Eduard Belas Marián Betušiak Geraud Delport Petr Praus 《Advanced functional materials》2021,31(48):2104467
The interaction of free carriers with defects and some critical defect properties are still unclear in methylammonium lead halide perovskites (MHPs). Here, a multi-method approach is used to quantify and characterize defects in single crystal MAPbI3, giving a cross-checked overview of their properties. Time of flight current waveform spectroscopy reveals the interaction of carriers with five shallow and deep defects. Photo-Hall and thermoelectric effect spectroscopy assess the defect density, cross-section, and relative (to the valence band) energy. The detailed reconstruction of free carrier relaxation through Monte Carlo simulation allows for quantifying the lifetime, mobility, and diffusion length of holes and electrons separately. Here, it is demonstrated that the dominant part of defects releases free carriers after trapping; this happens without non-radiative recombination with consequent positive effects on the photoconversion and charge transport properties. On the other hand, shallow traps decrease drift mobility sensibly. The results are the key for the optimization of the charge transport properties and defects in MHP and contribute to the research aiming to improve perovskite stability. This study paves the way for doping and defect control, enhancing the scalability of perovskite devices with large diffusion lengths and lifetimes. 相似文献
18.
Saba Gharibzadeh Ihteaz M. Hossain Paul Fassl Bahram Abdollahi Nejand Tobias Abzieher Moritz Schultes Erik Ahlswede Philip Jackson Michael Powalla Sren Schfer Michael Riencker Tobias Wietler Robby Peibst Uli Lemmer Bryce S. Richards Ulrich W. Paetzold 《Advanced functional materials》2020,30(19)
Wide‐bandgap perovskite solar cells (PSCs) with optimal bandgap (Eg) and high power conversion efficiency (PCE) are key to high‐performance perovskite‐based tandem photovoltaics. A 2D/3D perovskite heterostructure passivation is employed for double‐cation wide‐bandgap PSCs with engineered bandgap (1.65 eV ≤ Eg ≤ 1.85 eV), which results in improved stabilized PCEs and a strong enhancement in open‐circuit voltages of around 45 mV compared to reference devices for all investigated bandgaps. Making use of this strategy, semitransparent PSCs with engineered bandgap are developed, which show stabilized PCEs of up to 25.7% and 25.0% in four‐terminal perovskite/c‐Si and perovskite/CIGS tandem solar cells, respectively. Moreover, comparable tandem PCEs are observed for a broad range of perovskite bandgaps. For the first time, the robustness of the four‐terminal tandem configuration with respect to variations in the perovskite bandgap for two state‐of‐the‐art bottom solar cells is experimentally validated. 相似文献
19.
Zhen Chang Dexu Zheng Shuai Zhao Le Wang Sajian Wu Lu Liu Zhipeng Li Lu Zhang Qingshun Dong Hui Wang Shiwei Wang Kai Wang Shengzhong Liu 《Advanced functional materials》2023,33(22):2214983
All-perovskite tandem solar cells are promising for breaking through the single-junction Shockley–Queisser limit, and that potentially raises interest in configuring efficient Sn-Pb alloyed narrow-bandgap perovskite solar cells (PSCs). However, the Sn-Pb alloyed perovskites are commonly plagued by uncontrollable crystallization dynamics and severe p-doping levels. Herein, an effective additive molecule is designed with heterovalent substitution and antioxidant functions, whereby an organic metal coordination compound of tris(2,4-pentanedionato)gallium (TPGa) is employed to upgrade the quality of perovskite films. Ga3+ substitution obviously boosts the formation energy of Sn vacancies and heals the trap states. Meanwhile, the crystal structure evolution process is improved by the anchoring effect of 2,4-pentanedionato. The PSCs incorporating these improvements deliver not only a power conversion efficiency of 21.5% but also outstanding stability, as demonstrated by retaining 80% of the initial efficiency for over 1500 h. In addition, 23.14%-efficient all-perovskite tandem solar cells are further obtained by pairing this PSC with a wide-bandgap (1.74 eV) top cell. This study supports the feasibility of doping trivalent ions into the Sn-Pb alloyed perovskites to compromise the self-p-doping effect and highlights the importance of acetylacetone for passivating defects and hindering oxidation. 相似文献
20.
Mridul Sakhuja Jaesung Son Lalit K. Verma Hyunsoo Yang Charanjit S. Bhatia Aaron J. Danner 《Progress in Photovoltaics: Research and Applications》2014,22(3):356-361
Antireflective light trapping glass nanostructures fabricated by a non‐lithographic process are investigated for their angle dependent properties to improve the omnidirectional performance of solar modules. Optical transmission and solar cell module I‐V measurements are used to understand the dependence of angular performance of nanostructures in the packaging glass. Nanostructures 100–400 nm in height demonstrate an increase in solar light transmission both for normal as well as oblique incidence and measurements show that a ~200‐400 nm nanostructure height is optimum for solar modules, providing an absolute increase of 1% in the power conversion efficiency at normal incidence and a gain in short circuit current density over a 120° angular cone of solar incidence. This shows that packaging glass texturing can be an important and often‐overlooked method to yield substantial gain in solar module efficiency. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献