Journal ArticleDOI
Improved Charge Transport and Reduced Nonradiative Energy Loss Enable Over 16% Efficiency in Ternary Polymer Solar Cells
TLDR
This work suggests that utilizing the complementary advantages of fullerene and NFAs is a promising way to finely tune the detailed photovoltaic parameters and further improve the PCEs of PSCs.Abstract:
Recent advances in the material design and synthesis of nonfullerene acceptors (NFAs) have revealed a new landscape for polymer solar cells (PSCs) and have boosted the power conversion efficiencies (PCEs) to over 15%. Further improvements of the photovoltaic performance are a significant challenge in NFA-PSCs based on binary donor:acceptor blends. In this study, ternary PSCs are fabricated by incorporating a fullerene derivative, PC61 BM, into a combination of a polymer donor (PBDB-TF) and a fused-ring NFA (Y6) and a very high PCE of 16.5% (certified as 16.2%) is recorded. Detailed studies suggest that the loading of PC61 BM into the PBDB-TF:Y6 blend can not only enhance the electron mobility but also can increase the electroluminescence quantum efficiency, leading to balanced charge transport and reduced nonradiative energy losses simultaneously. This work suggests that utilizing the complementary advantages of fullerene and NFAs is a promising way to finely tune the detailed photovoltaic parameters and further improve the PCEs of PSCs.read more
Citations
More filters
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
Single-layered organic photovoltaics with double cascading charge transport pathways: 18% efficiencies
Ming Zhang,Lei Zhu,Guanqing Zhou,Tianyu Hao,Chaoqun Qiu,Zhe Zhao,Qin Hu,Bryon W. Larson,Haiming Zhu,Zaifei Ma,Zheng Tang,Wei Feng,Yongming Zhang,Thomas P. Russell,Feng Liu +14 more
TL;DR: In this article, double cascading energy level alignment in bulk heterojunction organic photovoltaic active layers is realized, enabling efficient carrier splitting and transport, and a record-breaking PCE of 18.07% is achieved where, by electronic structure and morphology optimization, simultaneous improvements of the opencircuit voltage, short-circuit current and fill factor occur.
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
Delocalization of exciton and electron wavefunction in non-fullerene acceptor molecules enables efficient organic solar cells
Guichuan Zhang,Xian Kai Chen,Xian Kai Chen,Jingyang Xiao,Philip C. Y. Chow,Minrun Ren,Grit Kupgan,Grit Kupgan,Xuechen Jiao,Xuechen Jiao,Xuechen Jiao,Christopher C. S. Chan,Xiaoyan Du,Ruoxi Xia,Ziming Chen,Jun Yuan,Yunqiang Zhang,Shoufeng Zhang,Yidan Liu,Yingping Zou,He Yan,Kam Sing Wong,Veaceslav Coropceanu,Veaceslav Coropceanu,Ning Li,Ning Li,Christoph J. Brabec,Jean-Luc Brédas,Jean-Luc Brédas,Hin-Lap Yip,Yong Cao +30 more
TL;DR: The delocalization of exciton and electron wavefunction due to strong π-π packing of Y6 is the key for the high performance of this state-of-the-art OSC system.
References
More filters
Journal ArticleDOI
Single-Junction Organic Solar Cell with over 15% Efficiency Using Fused-Ring Acceptor with Electron-Deficient Core
Jun Yuan,Yunqiang Zhang,Liuyang Zhou,Liuyang Zhou,Guichuan Zhang,Hin-Lap Yip,Tsz-Ki Lau,Xinhui Lu,Can Zhu,Can Zhu,Hongjian Peng,Paul A. Johnson,Mario Leclerc,Yong Cao,Jacek Ulanski,Yongfang Li,Yingping Zou +16 more
TL;DR: In this paper, a ladder-type electron-deficient core-based central fused ring (Dithienothiophen[3.2-b]- pyrrolobenzothiadiazole) with a benzothiadiadiazoles (BT) core was proposed to fine-tune its absorption and electron affinity.
Journal ArticleDOI
Organic and solution-processed tandem solar cells with 17.3% efficiency
Lingxian Meng,Yamin Zhang,Xiangjian Wan,Chenxi Li,Xin Zhang,Yanbo Wang,Xin Ke,Zuo Xiao,Liming Ding,Ruoxi Xia,Hin-Lap Yip,Yong Cao,Yongsheng Chen +12 more
TL;DR: In this article, a semi-empirical model analysis and using the tandem cell strategy to overcome the low charge mobility of organic materials, leading to a limit on the active-layer thickness and efficient light absorption was performed.
Journal ArticleDOI
Organic solar cells based on non-fullerene acceptors.
TL;DR: Non-fullerene OSCs show great tunability in absorption spectra and electron energy levels, providing a wide range of new opportunities, and this Review highlights these opportunities made possible by NF acceptors.
Journal ArticleDOI
Non-fullerene acceptors for organic solar cells
TL;DR: Non-fullerene acceptors (NFAs) are currently a major focus of research in the development of bulk-heterojunction organic solar cells (OSCs) as mentioned in this paper.
Journal ArticleDOI
Single-junction polymer solar cells with high efficiency and photovoltage
Zhicai He,Biao Xiao,Feng Liu,Hongbin Wu,Yali Yang,Steven Xiao,Cheng Wang,Thomas P. Russell,Yong Cao +8 more
TL;DR: In this paper, a photoactive layer made from a newly developed semiconducting polymer with a deepened valence energy level is used to reduce the tail state density below the conduction band of the electron acceptor.