Journal ArticleDOI
16.67% Rigid and 14.06% Flexible Organic Solar Cells Enabled by Ternary Heterojunction Strategy.
TLDR
A very promising ternary heterojunction strategy to develop highly efficient rigid and flexible OSCs is presented.Abstract:
Ternary heterojunction strategies appear to be an efficient approach to improve the efficiency of organic solar cells (OSCs) through harvesting more sunlight. Ternary OSCs are fabricated by employing wide bandgap polymer donor (PM6), narrow bandgap nonfullerene acceptor (Y6), and PC71 BM as the third component to tune the light absorption and morphologies of the blend films. A record power conversion efficiency (PCE) of 16.67% (certified as 16.0%) on rigid substrate is achieved in an optimized PM6:Y6:PC71 BM blend ratio of 1:1:0.2. The introduction of PC71 BM endows the blend with enhanced absorption in the range of 300-500 nm and optimises interpenetrating morphologies to promote photogenerated charge dissociation and extraction. More importantly, a PCE of 14.06% for flexible ITO-free ternary OSCs is obtained based on this ternary heterojunction system, which is the highest PCE reported for flexible state-of-the-art OSCs. A very promising ternary heterojunction strategy to develop highly efficient rigid and flexible OSCs is presented.read more
Citations
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Journal ArticleDOI
Non-fullerene acceptors with branched side chains and improved molecular packing to exceed 18% efficiency in organic solar cells
Chao Li,Jiadong Zhou,Jiali Song,Jinqiu Xu,Huotian Zhang,Xuning Zhang,Jing Guo,Lei Zhu,Donghui Wei,Guangchao Han,Jie Min,Yuan Zhang,Zengqi Xie,Yuanping Yi,He Yan,Feng Gao,Feng Liu,Yanming Sun +17 more
TL;DR: Li et al. as discussed by the authors showed that branched alkyl chains in non-fullerene acceptors allow favorable morphology in the active layer, enabling a certified device efficiency of 17.32% with a fill factor of 81.5% for single-junction organic solar cells.
Journal ArticleDOI
Over 17% efficiency ternary organic solar cells enabled by two non-fullerene acceptors working in an alloy-like model
Lingling Zhan,Shuixing Li,Tsz-Ki Lau,Yong Cui,Xinhui Lu,Minmin Shi,Chang-Zhi Li,Hanying Li,Jianhui Hou,Hongzheng Chen +9 more
TL;DR: In this article, an alloy-like composite is formed between Y6 and a newly designed derivative, BTP-M. Employing an electron-pushing methyl substituent as a replacement for the electron-withdrawing F atoms on Y6, the obtained Y6:BTP-m alloy can simultaneously optimize energy levels to reduce energy loss as well as the morphologies of the active layers to favor photocurrent generation, leading to an enhanced open-circuit voltage (Voc) of 0.875 V together with a larger shortcircuit current density (Jsc
Journal ArticleDOI
New Phase for Organic Solar Cell Research: Emergence of Y-Series Electron Acceptors and Their Perspectives
TL;DR: In this article, a new class of high-performance non-fullerene acceptors (NFAs) have been proposed for organic solar cells (OSCs), which have entered a new phase of research featuring high power conversion efficiencies.
Journal ArticleDOI
Organic photovoltaic cell with 17% efficiency and superior processability
Yong Cui,Huifeng Yao,Ling Hong,Tao Zhang,Yabing Tang,Baojun Lin,Kaihu Xian,Bowei Gao,Cunbin An,Pengqing Bi,Wei Ma,Jianhui Hou +11 more
TL;DR: It is demonstrated that the fine-modification of the flexible side chains of NFAs can yield 17% PCE for OPV cells, suggesting that optimization of the chemical structures of the OPV materials can improve device performance.
Journal ArticleDOI
Fine-Tuning Energy Levels via Asymmetric End Groups Enables Polymer Solar Cells with Efficiencies over 17%
Zhenghui Luo,Ruijie Ma,Tao Liu,Jianwei Yu,Yiqun Xiao,Rui Sun,Guanshui Xie,Jun Yuan,Yuzhong Chen,Kai Chen,Gaoda Chai,Huiliang Sun,Jie Min,Jian Zhang,Yingping Zou,Chuluo Yang,Xinhui Lu,Feng Gao,He Yan,He Yan +19 more
TL;DR: In this article, the authors modified the end groups of BTP-4F from IC-2F to CPTCN-Cl to achieve near optimal energy level match, resulting in higher open-circuit voltage (VOC) and power conversion efficiency (PCE).
References
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Journal ArticleDOI
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Journal ArticleDOI
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Journal ArticleDOI
Energy-Level Modulation of Small-Molecule Electron Acceptors to Achieve over 12% Efficiency in Polymer Solar Cells
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