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Polyfluorene Copolymers as High‐Performance Hole‐Transport Materials for Inverted Perovskite Solar Cells
Solar RRL ( IF 6.0 ) Pub Date : 2019-11-14 , DOI: 10.1002/solr.201900384 Jinlong Hu 1 , Jiang You 2 , Chang Peng 2 , Shudi Qiu 1 , Wenxin He 1 , Chaohui Li 3 , Xianhu Liu 3 , Yaohua Mai 1 , Fei Guo 1
Solar RRL ( IF 6.0 ) Pub Date : 2019-11-14 , DOI: 10.1002/solr.201900384 Jinlong Hu 1 , Jiang You 2 , Chang Peng 2 , Shudi Qiu 1 , Wenxin He 1 , Chaohui Li 3 , Xianhu Liu 3 , Yaohua Mai 1 , Fei Guo 1
Affiliation
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Inverted perovskite solar cells (PSCs) that can be entirely processed at low temperatures have attracted growing attention due to their cost‐effective production. Hole‐transport materials (HTMs) play an essential role in achieving efficient inverted PSCs, as they determine the effectiveness of charge extraction and recombination at interfaces. Herein, three polyfluorene copolymers (TFB, PFB, and PFO) are investigated as HTMs for construction of inverted PSCs. It is found that the photovoltaic performance of the solar cells is closely correlated with the electronic properties of the HTMs. Due to its high mobility along with the favored energy‐level alignment with perovskite, TFB shows superior charge extraction and suppressed interfacial recombination than PFB‐ and PFO‐based devices, which delivers a high efficiency of 18.48% with an open‐circuit voltage (VOC) of up to 1.1 V. In contrast, the presence of a large energy barrier in the PFO‐based devices results in substantial losses in both VOC and photocurrent. These results demonstrate that TFB can serve as a superior HTM for inverted PSCs. Moreover, it is anticipated that the performance of the three HTMs identified here might guide the molecular design of novel HTMs for the manufacture of highly efficient inverted PSCs.
中文翻译：
聚芴共聚物作为高性能的空穴传输材料，用于倒钙钛矿太阳能电池
可以在低温下完全加工的倒钙钛矿太阳能电池（PSC）由于其具有成本效益的生产方式而引起了越来越多的关注。空穴传输材料（HTM）在实现有效的反向PSC方面起着至关重要的作用，因为它们决定了界面处电荷提取和复合的有效性。在本文中，研究了三种聚芴共聚物（TFB，PFB和PFO）作为HTM，用于构建反向PSC。发现太阳能电池的光伏性能与HTM的电子特性密切相关。由于其高迁移率以及与钙钛矿的能级一致的偏爱，TFB与基于PFB和PFO的器件相比，显示出优异的电荷提取和抑制的界面重组，可实现18的高效率。V OC）最高可达1.1V。相反，基于PFO的设备中存在较大的能垒会导致V OC和光电流的大量损失。这些结果表明，TFB可以用作反向PSC的高级HTM。此外，可以预料，此处确定的三个HTM的性能可能会指导新型HTM的分子设计，以制造高效的反向PSC。
更新日期：2019-11-14
中文翻译：
聚芴共聚物作为高性能的空穴传输材料，用于倒钙钛矿太阳能电池
可以在低温下完全加工的倒钙钛矿太阳能电池（PSC）由于其具有成本效益的生产方式而引起了越来越多的关注。空穴传输材料（HTM）在实现有效的反向PSC方面起着至关重要的作用，因为它们决定了界面处电荷提取和复合的有效性。在本文中，研究了三种聚芴共聚物（TFB，PFB和PFO）作为HTM，用于构建反向PSC。发现太阳能电池的光伏性能与HTM的电子特性密切相关。由于其高迁移率以及与钙钛矿的能级一致的偏爱，TFB与基于PFB和PFO的器件相比，显示出优异的电荷提取和抑制的界面重组，可实现18的高效率。V OC）最高可达1.1V。相反，基于PFO的设备中存在较大的能垒会导致V OC和光电流的大量损失。这些结果表明，TFB可以用作反向PSC的高级HTM。此外，可以预料，此处确定的三个HTM的性能可能会指导新型HTM的分子设计，以制造高效的反向PSC。
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