Liu Xiaohui, Liu Cheng, Sun Ruixue, Liu Kun, Zhang Yajie, Wang Hai-Qiao, Fang Junfeng, Yang Chunhong
Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences , Beijing 100093, China.
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201, China.
ACS Appl Mater Interfaces. 2015 Sep 2;7(34):18904-8. doi: 10.1021/acsami.5b05969. Epub 2015 Aug 21.
In this study, a high-performance inverted polymer solar cell (PSC) has been fabricated by incorporating a zinc oxide (ZnO)/light-harvesting complex II (LHCII) stacked structure as the cathode interlayer. The LHCII not only smoothens the film surface of ZnO, improves the contact between ZnO and the photoactive layer, but also suppresses the charge carrier recombination at the interface, hence all the device parameters of PTB7-based solar cells are simultaneously improved, yielding higher power conversion efficiency (PCE) up to 9.01% compared with the control one (PCE 8.01%). And the thin LHCII modification layer also presents similar positive effects in the PTB7-Th:PC71BM system (PCE from 8.31% to 9.60%). These results put forward a facile approach to the interfacial modification in high-performance PSCs and provide new insight into developing and utilizing inexpensive and environmentally friendly materials from the fields of biological photosynthesis.
在本研究中，通过引入氧化锌（ZnO）/光捕获复合物II（LHCII）堆叠结构作为阴极中间层，制备了一种高性能倒置聚合物太阳能电池（PSC）。LHCII不仅使ZnO的薄膜表面光滑，改善了ZnO与光活性层之间的接触，还抑制了界面处的电荷载流子复合，因此基于PTB7的太阳能电池的所有器件参数都同时得到改善，与对照电池（功率转换效率（PCE）为8.01%）相比，产生了高达9.01%的更高功率转换效率。并且薄的LHCII改性层在PTB7-Th:PC71BM体系中也呈现出类似的积极效果（PCE从8.31%提高到9.60%）。这些结果提出了一种用于高性能PSC界面改性的简便方法，并为从生物光合作用领域开发和利用廉价且环保的材料提供了新的见解。
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