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纳米尺度局域接触实现聚合物钝化钙钛矿型太阳能电池高填充因子
作者:小柯机器人 发布时间:2021/1/24 19:51:43

澳大利亚国立大学Kylie R. Catchpole教授与Thomas P. White副教授团队,与中山大学李俊韬团队合作开发了通过纳米尺度局域接触实现聚合物钝化钙钛矿型太阳能电池高填充因子的策略。 相关研究成果于2021年1月22日发表在国际知名学术期刊《科学》。

聚合物钝化层可以提高钙钛矿型太阳能电池的开路电压。不幸的是,许多这样的层是不良导体,从而导致在钝化质量(电压)和串联电阻(填充因子,FF)之间的权衡。

该文中,研究人员引入了一种纳米图形化的电子传输层,它通过改变钝化层的空间分布来克服这种折衷,从而通过另外钝化的界面形成纳米级的局域电荷传输路径,进而提供有效的钝化和优异的电荷提取。通过将纳米电子传输层与无掺杂空穴传输层相结合,研究人员对制备了1cm2的电池,其转化功率为21.6%,FF高达0.839,在湿热暴露1000小时后仍保持约91.7%初始效率。

附:英文原文

Title: Nanoscale localized contacts for high fill factors in polymer-passivated perovskite solar cells

Author: Jun Peng, Daniel Walter, Yuhao Ren, Mike Tebyetekerwa, Yiliang Wu, The Duong, Qiaoling Lin, Juntao Li, Teng Lu, Md Arafat Mahmud, Olivier Lee Cheong Lem, Shenyou Zhao, Wenzhu Liu, Yun Liu, Heping Shen, Li Li, Felipe Kremer, Hieu T. Nguyen, Duk-Yong Choi, Klaus J. Weber, Kylie R. Catchpole, Thomas P. White

Issue&Volume: 2021/01/22

Abstract: Polymer passivation layers can improve the open-circuit voltage of perovskite solar cells when inserted at the perovskite–charge transport layer interfaces. Unfortunately, many such layers are poor conductors, leading to a trade-off between passivation quality (voltage) and series resistance (fill factor, FF). Here, we introduce a nanopatterned electron transport layer that overcomes this trade-off by modifying the spatial distribution of the passivation layer to form nanoscale localized charge transport pathways through an otherwise passivated interface, thereby providing both effective passivation and excellent charge extraction. By combining the nanopatterned electron transport layer with a dopant-free hole transport layer, we achieved a certified power conversion efficiency of 21.6% for a 1-square-centimeter cell with FF of 0.839, and demonstrate an encapsulated cell that retains ~91.7% of its initial efficiency after 1000 hours of damp heat exposure.

DOI: 10.1126/science.abb8687

Source: https://science.sciencemag.org/content/371/6527/390

期刊信息

Science:《科学》,创刊于1880年。隶属于美国科学促进会,最新IF:41.845
官方网址:https://www.sciencemag.org/
投稿链接:https://cts.sciencemag.org/scc/#/login