Journal ArticleDOI
Single-Junction Organic Photovoltaic Cells with Approaching 18% Efficiency.
Yong Cui,Huifeng Yao,Jianqi Zhang,Kaihu Xian,Tao Zhang,Ling Hong,Yuming Wang,Yuming Wang,Ye Xu,Kangqiao Ma,Cunbin An,Chang He,Zhixiang Wei,Zhixiang Wei,Feng Gao,Jianhui Hou +15 more
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TLDR
The results demonstrate that minimizing the alkyl chains to get suitable solubility and enhanced intermolecular packing has a great potential in further improving its photovoltaic performance.Abstract:
Optimizing the molecular structures of organic photovoltaic (OPV) materials is one of the most effective methods to boost power conversion efficiencies (PCEs). For an excellent molecular system with a certain conjugated skeleton, fine tuning the alky chains is of considerable significance to fully explore its photovoltaic potential. In this work, the optimization of alkyl chains is performed on a chlorinated nonfullerene acceptor (NFA) named BTP-4Cl-BO (a Y6 derivative) and very impressive photovoltaic parameters in OPV cells are obtained. To get more ordered intermolecular packing, the n-undecyl is shortened at the edge of BTP-eC11 to n-nonyl and n-heptyl. As a result, the NFAs of BTP-eC9 and BTP-eC7 are synthesized. The BTP-eC7 shows relatively poor solubility and thus limits its application in device fabrication. Fortunately, the BTP-eC9 possesses good solubility and, at the same time, enhanced electron transport property than BTP-eC11. Significantly, due to the simultaneously enhanced short-circuit current density and fill factor, the BTP-eC9-based single-junction OPV cells record a maximum PCE of 17.8% and get a certified value of 17.3%. These results demonstrate that minimizing the alkyl chains to get suitable solubility and enhanced intermolecular packing has a great potential in further improving its photovoltaic performance.read more
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Journal ArticleDOI
Single-Junction Organic Photovoltaic Cell with 19% Efficiency
Yong Cui,Ye Xu,Huifeng Yao,Pengqing Bi,Ling Hong,Jianqi Zhang,Yunfei Zu,Tao Zhang,Jinzhao Qin,Junzhen Ren,Zhihao Chen,Chang He,Xiaotao Hao,Zhixiang Wei,Zhixiang Wei,Jianhui Hou +15 more
TL;DR: In this paper, an active layer comprising a new widebandgap polymer donor named PBQx-TF and a new low-bandgap non-fullerene acceptor (NFA) named eC9-2Cl is rationally designed.
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
Layer-by-Layer Processed Ternary Organic Photovoltaics with Efficiency over 18.
Lingling Zhan,Shuixing Li,Xinxin Xia,Yaokai Li,Xinhui Lu,Lijian Zuo,Minmin Shi,Hongzheng Chen +7 more
TL;DR: In this article, a solution to resolve the above challenge via synergistically combining the layer-by-layer (LbL) procedure and the ternary strategy is proposed and demonstrated.
Journal ArticleDOI
Self-assembled Monolayer Enables HTL-free Organic Solar Cells with 18% Efficiency and Improved Operational Stability
Yuanbao Lin,Yuliar Firdaus,Furkan Halis Isikgor,Mohamad Insan Nugraha,Emre Yengel,George T. Harrison,Rawad K. Hallani,Abdulrahman El Labban,Hendrik Faber,Chun Ma,Xiaopeng Zheng,Anand S. Subbiah,Calvyn Travis Howells,Osman M. Bakr,Iain McCulloch,Stefaan De Wolf,Leonidas Tsetseris,Thomas D. Anthopoulos +17 more
TL;DR: In this paper, a self-assembled monolayer (SAM) 2PACz was used as a hole-selective interlayer functionalized directly onto the indium tin oxid.
Journal ArticleDOI
A Well-Mixed Phase Formed by Two Compatible Non-Fullerene Acceptors Enables Ternary Organic Solar Cells with Efficiency over 18.6%
Yunhao Cai,Yun Li,Rui Wang,Hongbo Wu,Zhihao Chen,Jie Zhang,Zaifei Ma,Xiaotao Hao,Yong Zhao,Chunfeng Zhang,Fei Huang,Yanming Sun +11 more
TL;DR: In this paper, a novel non-fullerene acceptor L8-BO-F is designed and incorporated into the PM6:BTP-eC9 blend, which shows complementary absorption spectra and cascade energy alignment.
References
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Single-Junction Organic Solar Cell with over 15% Efficiency Using Fused-Ring Acceptor with Electron-Deficient Core
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