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Morongwa E. Ramoroka;Sodiq T. Yussuf;Kelechi C. Nwambaekwe;Kwena D. Modibane;Vivian S. John-Denk;Samantha F. Douman;Emmanuel I. Iwuoha; 《Solar RRL》2024,8(7):2300982
This work highlights recent advancements in how the structures and chemical makeups of the active layer materials affect photovoltaic processes and performance in terms of power conversion efficiency and stability. It further sheds light on the performance optimization of organic photovoltaic cell (OPV) and the relationship between these optimization conditions and OPVs performance. The use of different substituents on the same donor or acceptor material has different optimal conditions. Furthermore, it is shown that the addition of different third components in the active layer has different optimal concentration points. This review also highlights and suggests a possible way to improve the stability of OPV through modification of the active layer. To date, some studies showed that incorporation of the third component in the active layer leads to over 97% stability after more than 1000 h. 相似文献
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Guanglong Wu Guangjin Zhao Chang He Qingguo He Yongfang Li 《Solar Energy Materials & Solar Cells》2009,93(1):108-113
A solution-processable and star-shaped molecule 4-((E)-2-(benzo[1,2,5]thiadiazol-4-yl)vinyl)-N,N-bis(4-((E)-2-(benzo[1,2,5]thiadiazol-7-yl)vinyl)phenyl)benzenamine (TPA-BT) has been designed and synthesized by palladium-catalyzed Heck reaction for the application in organic solar cells (OSCs). The molecule possesses a D-A structure with a triphenylamine core (donor unit) linked with three benzo[1,2,5]thiadiazole (acceptor unit) arms through double bonds. TPA-BT film shows a strong absorption peak in the visible wavelength range from 400 to 560 nm, which could be ascribed to the charge transfer band of the D-A structure of the molecule. The bulk-heterojunction OSCs with the device structure of ITO/PEDOT:PSS/TPA-BT:PCBM/Ca/Al (or Ba/Al) were fabricated by spin-coating the blend solution of TPA-BT and PCBM (1:3, w/w), in which TPA-BT was used as donor and PCBM as acceptor materials. The devices show a high open circuit voltage of ca. 0.9 V and a power conversion efficiency of 0.61%, under the illumination of AM 1.5, 100 mW/cm2. The results indicate that TPA-BT is a promising solution-processable organic photovoltaic material. 相似文献
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热致变色材料的分类及变色机理 总被引：1，自引：0，他引：1
介绍新型热记忆功能材料—热致变色材料的国内外研究开发进展,着重阐述热致变色材料的分类及变色机理,对热致变色材料的分类、不可逆与可逆热致变色材料的变色机理进行了详尽的论述。在热致变色材料中有机可逆热致变色材料优点众多,将是今后研究的热点方向。 相似文献
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Zezhou Xia;Xinyu Lei;Yuwei Hu;Xiujun Liu;Yitong Ji;Dongyang Zhang;Yingying Cheng;Xiangda Liu;Zhuozheng Xu;Xueyuan Yang;Jie Zhong;Wenchao Huang; 《Solar RRL》2024,8(12):2400230
Ultrathin flexible organic solar cells (OSCs) have garnered widespread attention in wearable electronic devices for their lightweight and excellent conformability. Silver nanowires (AgNWs) are one of the most widely used bottom electrodes because of their high conductivity and transmittance. However, the high roughness of AgNWs on the flexible substrate exerts adverse effects on device performance. To address this critical issue, a bilayer electron-transport-materials (ETMs) strategy consisting of an indium-doped zinc oxide (IZO) and a pristine ZnO is developed. The IZO is utilized as the first layer of ETM, which can effectively fill voids in AgNWs to form a high-conductive composite electrode. The ZnO is used as the second layer of ETM, facilitating charge extraction. The ultrathin flexible OSCs prepared based on the gradient bilayer ETMs can achieve a power conversion efficiency (PCE) of 16.1%, associated with improved mechanical stability, showing a PCE retention of 93% after 10 000 bending cycles (R = 1 mm) and 82% under 1000 compression (30%)-release cycling test. To the best of knowledge, it's one of the highest efficiency for ultrathin (less than 10 μm) flexible OSCs based on the solution-processed electrodes. This work will provide a new avenue for fabricating high-performance and mechanically robust ultraflexible ITO-free OSCs. 相似文献
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Zheng Xiao;Shitong Li;Jian Liu;Xin Chen;Zhaochen Suo;Chenxi Li;Xiangjian Wan;Yongsheng Chen; 《Solar RRL》2024,8(11):2400206
Flexibility is a key advantage of organic solar cells (OSCs), and the power conversion efficiencies (PCEs) of flexible OSCs (FOSCs) are primarily constrained by flexible transparent electrodes (FTEs). While much attention has been devoted to the study of conductive layers on FTEs, the importance of flexible substrates in influencing the properties of FTEs and the performance of FOSCs is often overlooked. In this study, an FTE is developed using an eco-friendly ethyl cellulose (EC) substrate and silver nanowires (AgNWs) as the conductive electrode. The FTE exhibits a high transmittance of up to 88% at 550 nm and a low sheet resistance of 17.65 Ω/□. Consequently, FOSCs based on the EC/PI FTEs achieve a remarkable PCE of 18.05%, comparable to that on the rigid ITO substrate. The flexible devices also demonstrate excellent bending and peeling durability even under extreme bending conditions. 相似文献
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Organic photovoltaic cells (OPVs) are fabricated with a polymer donor PM7 and a nonfullerene acceptor IT‐4Cl; the morphology of active layers is optimized by employing upside‐down solvent vapor annealing (UD‐SVA) method with different annealing solvents. The OPVs with CS2 as annealing solvent exhibit optimized power conversion efficiency (PCE) of 13.76%, with simultaneously increased short‐circuit current density (JSC) of 20.53 mA cm?2 and fill factor (FF) of 77.05%. More than 15% PCE improvement can be achieved by employing CS2 UD‐SVA treatment, which should be attributed to slightly enhanced photon harvesting, efficient exciton separation, charge transport, and collection, resulting from the well‐developed morphology of active layer. Moreover, the PM7:IT‐4Cl–based OPVs with CS2 as annealing solvent still can maintain PCE more than 13% in a wide treatment time range from 20 to 90 seconds. This work demonstrated that UD‐SVA has great potential in improving the performance of nonfullerene OPVs. 相似文献
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Guibin Shen Xin Li Yuqin Zou Hongye Dong Dongping Zhu Yanglin Jiang Xin Ren Ng Fen Lin Peter Müller-Buschbaum Cheng Mu 《ENERGY & ENVIRONMENTAL MATERIALS》2024,7(1):e12504
The improvement in the efficiency of inverted perovskite solar cells (PSCs) is significantly limited by undesirable contact at the NiOX/perovskite interface. In this study, a novel microstructure-control technology is proposed for fabrication of porous NiOX films using Pluronic P123 as the structure-directing agent and acetylacetone (AcAc) as the coordination agent. The synthesized porous NiOX films enhanced the hole extraction efficiency and reduced recombination defects at the NiOX/perovskite interface. Consequently, without any modification, the power conversion efficiency (PCE) of the PSC with MAPbI3 as the absorber layer improved from 16.50% to 19.08%. Moreover, the PCE of the device composed of perovskite Cs0.05(MA0.15FA0.85)0.95Pb(I0.85Br0.15)3 improved from 17.49% to 21.42%. Furthermore, the application of the fabricated porous NiOX on fluorine-doped tin oxide (FTO) substrates enabled the fabrication of large-area PSCs (1.2 cm2) with a PCE of 19.63%. This study provides a novel strategy for improving the contact at the NiOX/perovskite interface for the fabrication of high-performance large-area perovskite solar cells. 相似文献
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F.C. Treble 《Renewable Energy》1994,5(1-4)
A procedure for determining the rated power of crystalline silicon photovoltaic arrays from on-site measurements in the field is described. It is the outcome of several years' experience in the testing of European pilot and demonstration plants and has formed the basis of an IEC draft standard on the subject. The procedure differs significantly from that followed when measuring the rated performance of solar cells and modules. The reasons for these differences are explained. 相似文献