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Yuanpeng Xie Yunhao Cai Lei Zhu Ruoxi Xia Linglong Ye Xiang Feng Hin‐Lap Yip Feng Liu Guanghao Lu Songting Tan Yanming Sun 《Advanced functional materials》2020,30(28)
The development of semitransparent organic solar cells (ST‐OSCs) represents a significant step toward the commercialization of OSCs. However, the trade‐off between power conversion efficiency (PCE) and average visible transmittance (AVT) restricts further improvements of ST‐OSCs. Herein, it is demonstrated that a fibril network strategy can enable ST‐OSCs with a high PCE and AVT simultaneously. A wide‐bandgap polymer PBT1‐C‐2Cl that can self‐assemble into a fibril nanostructure is used as the donor and a near‐infrared small molecule Y6 is adopted as the acceptor. It is found that a tiny amount of PBT1‐C‐2Cl in the blend can form a high speed pathway for hole transport due to the well distributed fibril nanostructure, which increases the transmittance in the visible region. Meanwhile, the acceptor Y6 guarantees sufficient light absorption. Using this strategy, the optimized ST‐OSCs yield a high PCE of 9.1% with an AVT of over 40% and significant light utilization efficiency of 3.65% at donor/acceptor ratio of 0.25:1. This work demonstrates a simple and effective approach to realizing high PCE and AVT of ST‐OSCs simultaneously. 相似文献
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Chunyu Xu Ke Jin Zuo Xiao Zijin Zhao Xiaoling Ma Xuelin Wang Junming Li Wenjing Xu Shuping Zhang Liming Ding Fujun Zhang 《Advanced functional materials》2021,31(52):2107934
Wide bandgap polymer D18 with narrow photon harvesting in visible light range and small molecule N3 with near-infrared photon harvesting are adopted for building semitransparent organic photovoltaics (OPVs). To find out the optimal D18:N3 weight ratio for semitransparent OPVs, series of opaque OPVs are built with a varied D18:N3 weight ratio. The power conversion efficiency (PCE) and fill factor can be maintained over 16% and 77% in the D18:N3 (0.7:1.6, wt/wt) based opaque OPVs, respectively. The average visible transmittance (AVT) of the corresponding blend films can be achieved over 50%, demonstrating the great potential in fabricating efficient semitransparent OPVs. The semitransparent OPVs based on D18:N3 (0.7:1.6, wt/wt) are fabricated by using 1 nm Au/(10, 15, 20 nm) Ag as cathode. The thickness of Ag layers is varied to balance the optical properties and electrical properties of semitransparent top electrode. The semitransparent OPVs with 10 nm Ag achieve the highest light utilization efficiency of 2.90% with a PCE of 12.91% and an AVT of 22.49%, which should be among the best performance of reported semitransparent OPVs. This work demonstrates that the wide bandgap polymer donor with narrow photon harvesting in visible light range has great potential in preparing efficient semitransparent OPVs. 相似文献
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Chih‐Yu Chang Lijian Zuo Hin‐Lap Yip Yongxi Li Chang‐Zhi Li Chain‐Shu Hsu Yen‐Ju Cheng Hongzheng Chen Alex K.‐Y. Jen 《Advanced functional materials》2013,23(40):5084-5090
The versatility of a fluoro‐containing low band‐gap polymer, poly[2,6‐(4,4‐bis(2‐ethylhexyl)‐4H‐cyclopenta[2,1‐b;3,4‐b’]dithiophene)‐alt‐4,7‐(5‐fluoro‐2,1,3‐benzothia‐diazole)] (PCPDTFBT) in organic photovoltaics (OPVs) applications is demonstrated. High boiling point 1,3,5‐trichlorobenzene (TCB) is used as a solvent to manipulate PCPDTFBT:[6,6]‐phenyl‐C71‐butyric acid methyl ester (PC71BM) active layer morphology to obtain high‐performance single‐junction devices. It promotes the crystallization of PCPDTFBT polymer, thus improving the charge‐transport properties of the active layer. By combining the morphological manipulation with interfacial optimization and device engineering, the single‐junction device exhibits both good air stability and high power‐conversion efficiency (PCE, of 6.6%). This represents one of the highest PCE values for cyclopenta[2,1‐b;3,4‐b’]dithiophene (CPDT)‐based OPVs. This polymer is also utilized for constructing semitransparent solar cells and double‐junction tandem solar cells to demonstrate high PCEs of 5.0% and 8.2%, respectively. 相似文献
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Shuai Zhang Mian Cai Chenyu Shang Fuzhen Bi Fan Feng Zhengkun Du Cheng Sun Yonghai Li Xichang Bao 《Advanced functional materials》2023,33(31):2301701
All-polymer solar cells (APSCs) have attracted increasing attention due to the superior stability and mechanical flexibility. However, power conversion efficiencies (PCEs) of APSCs fall behind ascribed to limited efficient polymer donors (PDs). Particularly, there are rare reports of high-performance PDs with ultrawide bandgaps, which are indispensable to maximally harvest high-energy photons for better light utilization. Herein, the significance of intramolecular charge transfer and quinoid resonance effects in regulating bandgaps of donor-acceptor conjugated materials is highlighted, and a novel polymer donor PBPD based on phenyl/pyridyl fused phenanthridine (PD) moiety is reported. Consequently, PBPD receives an ultrawide optical bandgap up to 2.24 eV and strong absorptivity at 487–523 nm, which exactly follows the strongest radiation of solar spectrum. The amplified light utilization of high-energy photons endows PBPD:PY-IT based APSCs with high power conversion efficiency of 15.29%, which ranks the best among APSCs with ultrawide bandgap PDs and challenges typical PDs with bandgaps of ≈1.80 eV. Thanks to the unique light responses and molecular orientations of PBPD, the PBPD-contained ternary APSCs receive further optimized photon utilization and refined PCEs over 17%. This study sheds light on the design principles of ultrawide bandgap polymers and demonstrates the great promise of large bandgap PDs for efficient APSCs. 相似文献
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Xiang Xu Qingya Wei Zhisheng Zhou Haozhe He Jingjing Tian Hin-Lap Yip Yuang Fu Xinhui Lu Yonghua Zhou Yongfang Li Yingping Zou 《Advanced functional materials》2024,34(50):2305017
Semitransparent organic solar cells (ST-OSCs) can function as power-generating windows due to their ability to allow visible light go-through for human eyesight while absorbing low-energy photons in the near-infrared region for photocurrent generation. In this regard, effective ST-OSCs with high light utilization efficiency (LUE) and color rendering index (CRI) can be developed via a synergistic material and device engineering strategy. Herein, an A-DA'D-A acceptor BZO-4Cl is synthesized with an ultralow optical bandgap of 1.26 eV and bathochromically shifted absorption of roughly 60 nm with respect to Y6. Initially, the opaque devices using PTB7-Th as the donor show a high power conversion efficiency (PCE) of 14.12% , which can be listed as one of the highest efficiencies for the PTB7-Th-based OSCs so far. Then, through these efforts of optimizations in the bulk-heterojunction(BHJ) composition, top electrodes and anti-reflection layer, the cutting-edge ST-OSC demonstrates a high LUE of 4.02%, and a CRI of 90.67%, making it one of the best-performing ST-OSCs with both high LUE and CRI values. These results indicate that the ST-OSCs presented in this study have significant potential for use in applications that possess transparent visible light and energy-generation functions. 相似文献
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Microcavity Structure Provides High‐Performance (>8.1%) Semitransparent and Colorful Organic Photovoltaics 
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下载免费PDF全文 Jong‐Hong Lu Yi‐Hung Lin Bing‐Huang Jiang Chun‐Hung Yeh Jui‐Chih Kao Chih‐Ping Chen 《Advanced functional materials》2018,28(7)
High‐performance colored aesthetic semitransparent organic photovoltaics (OPVs) featuring a silver/indium tin oxide/silver (Ag/ITO/Ag) microcavity structure are prepared. By precisely controlling the thickness of the ITO layer, OPV devices exhibiting high transparency and a wide and high‐purity color gamut are obtained: blue ( B ), green ( G ), yellow‐green ( YG ), yellow ( Y ), orange ( O ), and red ( R ). The power conversion efficiencies (PCEs) of the G , YG , and Y color devices are greater than 8% (AM 1.5G irradiation, 100 mW cm?2) with maximum transmittances (TMAX) of greater than 14.5%. An optimized PCE of 8.2% was obtained for the YG OPV [CIE 1931 coordinates: (0.364, 0.542)], with a value of TMAX of 17.3% (at 561 nm). As far as it is known, this performance is the highest ever reported for a transparent colorful OPV. Such high transparency and desired transmitted colors, which can perspective see the clear images, suggest great potential for use in building‐integrated photovoltaic applications. 相似文献
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The reported semi-transparent organic solar cells (ST-OSCs) are commonly based on a middle bandgap donor and narrow bandgap acceptor blend, for example, the PTB7-Th:Y6 blend. However, the strong absorption of PTB7-Th in the visible region hinders the further improvement of average visible transmission (AVT) for the ST-OSCs. Here we report a new kind of all-small-molecule ST-OSCs based on TAPC:Y6 blend. The used donor TAPC has little absorption in the visible region, which is beneficial for attaining high transparency. The optimized ST-OSCs based on TAPC:Y6 blend realize a power conversion efficiency of 3.01%. Importantly, a high AVT of 47.99% is achieved for this kind of ST-OSCs, much higher than those of reported ST-OSCs. The proposed TAPC:Y6 ST-OSCs also have a good color perception, whose CIE 1931 coordinates are (0.292,0.313) and color rendering index is 94.5. 相似文献
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Chao Xie Xing‐Tong Lu Xiao‐Wei Tong Zhi‐Xiang Zhang Feng‐Xia Liang Lin Liang Lin‐Bao Luo Yu‐Cheng Wu 《Advanced functional materials》2019,29(9)
Due to its significant applications in many relevant fields, light detection in the solar‐blind deep‐ultraviolet (DUV) wavelength region is a subject of great interest for both scientific and industrial communities. The rapid advances in preparing high‐quality ultrawide‐bandgap (UWBG) semiconductors have enabled the realization of various high‐performance DUV photodetectors (DUVPDs) with different geometries, which provide an avenue for circumventing numerous disadvantages in traditional DUV detectors. This article presents a comprehensive review of the applications of inorganic UWBG semiconductors for solar‐blind DUV light detection in the past several decades. Different kinds of DUVPDs, which are based on varied UWBG semiconductors including Ga2O3, MgxZn1?xO, III‐nitride compounds (AlxGa1?xN/AlN and BN), diamond, etc., and operate on different working principles, are introduced and discussed systematically. Some emerging techniques to optimize device performance are addressed as well. Finally, the existing techniques are summarized and future challenges are proposed in order to shed light on development in this critical research field. 相似文献
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Tao Xu Luyao Lu Tianyue Zheng Jodi M. Szarko Alexander Schneider Lin X. Chen Luping Yu 《Advanced functional materials》2014,24(22):3432-3437
This paper describes the synthesis of low bandgap copolymers incorporating an artificial sweetener derivative, N‐alkyl, 3‐oxothieno[3,4‐d]isothiazole 1,1‐dioxide (TID). This new TID unit is identical to the well‐known thieno[3,4‐c]pyrrole‐4,6‐dione (TPD) unit except that one carbonyl has been replaced by a sulfonyl group. Semi‐empirical calculations on the local dipole moment change between ground and excited states (Δμge) in the repeating units of the new polymer indicate that the replacement of the carbonyl by a sulfonyl group leads to larger Δμge values. The resulting polymers exhibit a diminished power‐conversion efficiency (PCE) compared to a bulk heterojunction (BHJ) solar cells with PC71BM as an acceptor, which extends the correlation between PCE and Δμge of single repeating units in p‐type polymers to a new regime. Detailed studies show that the strongly electron‐withdrawing sulfonyl group is detrimental to charge separation in alternating copolymers containing a TID unit. 相似文献
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This article aims to review the recent progress and future aspects of organic solar cells (OSCs). Different device designs proposed for efficient light harvesting and their advancements have been discussed. We have discussed various parameters limiting their efficiency and their possible solutions. Special attention has been paid to understand the device physics and its fundamental facets. Open circuit voltage (Voc) is an important parameter in the determination of their efficiency, but the picture behind the real origin of Voc is not very much clear; therefore, this issue has been discussed in detail. Short lifetime is another important issue; therefore, recent progress in stability and related issues has also been discussed. The progress in roll to roll (R2R) processing and demonstration for large‐area OSCs has been paid particular attention. The areas, where further advances will help in the commercial realization of this technology, have also been discussed. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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Ummugulsum Gunes Esra Bag Celik Cevahir C. Akgul Mehmet Koc Mohsen Ameri Bahri E. Uzuner Milad Ghasemi Mehmet C. Sahiner İlker Yildiz Hava Z. Kaya Selcuk Yerci Gorkem Gunbas 《Advanced functional materials》2021,31(42):2103130
Perovskite surface treatment with additives has been reported to improve charge extraction, stability, and/or surface passivation. In this study, treatment of a 3D perovskite ((FAPbI3)1−x(MAPbBr3)x) layer with a thienothiophene-based organic cation (TTMAI), synthesized in this work, is investigated. Detailed analyses reveal that a 2D (n = 1) or quasi-2D layer does not form on the PbI2-rich surface 3D perovskite. TTMAI-treated 3D perovskite solar cells (PSCs) fabricated in this study show improved fill factors, providing an increase in their power conversion efficiencies (PCEs) from 17% to over 20%. It is demonstrated that the enhancement is due to better hole extraction by drift-diffusion simulations. Furthermore, thanks to the hydrophobic nature of the TTMAI, PSC maintains 82% of its initial PCE under 15% humidity for over 380 h (the reference retains 38%). Additionally, semitransparent cells are demonstrated reaching 17.9% PCE with treated 3D perovskite, which is one of the highest reported efficiencies for double cationic 3D perovskites. Moreover, the semitransparent 3D PSC (TTMAI-treated) maintains 87% of its initial efficiency for six weeks (>1000 h) when kept in the dark at room temperature. These results clearly show that this study fills a critical void in perovskite research where highly efficient and stable semitransparent perovskite solar cells are scarce. 相似文献
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Chin Pang Yau Zhuping Fei Raja Shahid Ashraf Munazza Shahid Scott E. Watkins Pichaya Pattanasattayavong Thomas D. Anthopoulos Vasilis G. Gregoriou Christos L. Chochos Martin Heeney 《Advanced functional materials》2014,24(5):678-687
A series of donor–acceptor (D–A) conjugated polymers utilizing 4,4‐bis(2‐ethylhexyl)‐4H‐germolo[3,2‐b:4,5‐b′]dithiophene ( DTG ) as the electron rich unit and three electron withdrawing units of varying strength, namely 2‐octyl‐2H‐benzo[d][1,2,3]triazole ( BTz ), 5,6‐difluorobenzo[c][1,2,5]thiadiazole ( DFBT ) and [1,2,5]thiadiazolo[3,4‐c]pyridine ( PT ) are reported. It is demonstrated how the choice of the acceptor unit ( BTz , DFBT , PT ) influences the relative positions of the energy levels, the intramolecular transition energy (ICT), the optical band gap (Egopt), and the structural conformation of the DTG ‐based co‐polymers. Moreover, the photovoltaic performance of poly[(4,4‐bis(2‐ethylhexyl)‐4H‐germolo[3,2‐b:4,5‐b′]dithiophen‐2‐yl)‐([1,2,5]thiadiazolo[3,4‐c]pyridine)] ( PDTG‐PT ), poly[(4,4‐bis(2‐ethylhexyl)‐4H‐germolo[3,2‐b:4,5‐b′]dithiophen‐2‐yl)‐(2‐octyl‐2H‐benzo[d][1,2,3]triazole)] ( PDTG‐BTz ), and poly[(4,4‐bis(2‐ethylhexyl)‐4H‐germolo[3,2‐b:4,5‐b′]dithiophen‐2‐yl)‐(5,6‐difluorobenzo[c][1,2,5]thiadiazole)] ( PDTG‐DFBT ) is studied in blends with [6,6]‐phenyl‐C70‐butyric acid methyl ester ( PC70BM ). The highest power conversion efficiency (PCE) is obtained by PDTG‐PT (5.2%) in normal architecture. The PCE of PDTG‐PT is further improved to 6.6% when the device architecture is modified from normal to inverted. Therefore, PDTG‐PT is an ideal candidate for application in tandem solar cells configuration due to its high efficiency at very low band gaps (Egopt = 1.32 eV). Finally, the 6.6% PCE is the highest reported for all the co‐polymers containing bridged bithiophenes with 5‐member fused rings in the central core and possessing an Egopt below 1.4 eV. 相似文献
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Tayebeh Ameri Gilles Dennler Christoph Waldauf Hamed Azimi Andrea Seemann Karen Forberich Jens Hauch Markus Scharber Kurt Hingerl Christoph J. Brabec 《Advanced functional materials》2010,20(10):1592-1598
Semitransparent inverted organic photodiodes are fabricated with a Baytron PH500 ethylene‐glycol layer/silver grid as the top electrode. Reasonable performances are obtained under both rear‐ and front‐side illumination and efficiencies up to 2% are achieved. Some light is shed on visual prospects through optical simulations for a semitransparent device of poly(3‐hexylthiophene) (P3HT) and the C60 derivative 1‐(3‐methoxycarbonyl)propyl‐1‐phenyl[6,6]C71 (PC70BM) in the inverted structure. These calculations allow the maximum efficiency achievable to be predicted for semitransparent cells based on P3HT:PC70BM versus the transparency perception for a human eye. The simulations suggest that low‐bandgap materials such as poly[2,6‐(4,4‐bis‐(2‐ethylhexyl)‐4H‐cyclopenta[2,1‐b;3,4‐b′]dithiophene)‐alt‐4,7‐(2,1,3‐benzothiadiazole)] (PCPDTBT) have a better potential for semitransparent devices. In addition, the color range recognized by the human eye is predicted by the optical simulation for some semitransparent devices including different active layers. 相似文献
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Yaroslav S. Kochergin Katherine Villa Filip Novotný Jan Plutnar Michael J. Bojdys Martin Pumera 《Advanced functional materials》2020,30(38)
Photosensitive micromotors that can be remotely controlled by visible light irradiation demonstrate great potential in biomedical and environmental applications. To date, a vast number of light‐driven micromotors are mainly composed from costly heavy and precious metal‐containing multicomponent systems, that limit the modularity of chemical and physical properties of these materials. Herein, a highly efficient photocatalytic micromotors based exclusively on a purely organic polymer framework—semiconducting sulfur‐ and nitrogen‐containing donor–acceptor polymer, is presented. Thanks to precisely tuned molecular architecture, this material has the ability to absorb visible light due to a conveniently situated energy gap. In addition, the donor‐acceptor dyads within the polymer backbone ensure efficient photoexcited charge separation. Hence, these polymer‐based micromotors can move in aqueous solutions under visible light illumination via a self‐diffusiophoresis mechanism. Moreover, these micromachines can degrade toxic organic pollutants and respond to an increase in acidity of aqueous environments by instantaneous colour change. The combination of autonomous motility and intrinsic fluorescence enables these organic micromotors to be used as colorimetric and optical sensors for monitoring of the environmental aqueous acidity. The current findings open new pathways toward the design of organic polymer‐based micromotors with tuneable band gap architecture for fabrication of self‐propelled microsensors for environmental control and remediation applications. 相似文献