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Low‐Temperature‐Processed WOx as Electron Transfer Layer for Planar Perovskite Solar Cells Exceeding 20% Efficiency
Solar RRL ( IF 6.0 ) Pub Date : 2020-01-31 , DOI: 10.1002/solr.201900499 Cong Chen 1 , Yue Jiang 1 , Yehui Wu 1 , Jiali Guo 1 , Xiangyu Kong 1 , Xiayan Wu 1 , Yuzhu Li 1 , Dongfeng Zheng 1 , Sujuan Wu 1 , Xingsen Gao 1 , Zhipeng Hou 1 , Guofu Zhou 2 , Yiwang Chen 3 , Jun-Ming Liu 1, 4 , Krzysztof Kempa 1, 5 , Jinwei Gao 1
Solar RRL ( IF 6.0 ) Pub Date : 2020-01-31 , DOI: 10.1002/solr.201900499 Cong Chen 1 , Yue Jiang 1 , Yehui Wu 1 , Jiali Guo 1 , Xiangyu Kong 1 , Xiayan Wu 1 , Yuzhu Li 1 , Dongfeng Zheng 1 , Sujuan Wu 1 , Xingsen Gao 1 , Zhipeng Hou 1 , Guofu Zhou 2 , Yiwang Chen 3 , Jun-Ming Liu 1, 4 , Krzysztof Kempa 1, 5 , Jinwei Gao 1
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Low‐temperature, solution‐processed metal oxides are of great interest as alternative materials for electron transport layers in perovskite solar cells. WOx is a promising candidate that could truly enable low‐temperature (<100 °C) processing. However, its amorphous‐state form typically obtained with the solution process suffers from high defect density. This causes large charge recombination, and consequently significant deterioration of the solar cell efficiency. Herein, an ultra‐low‐temperature processed (50 °C) nanocrystalline WOx as the electron transport layer, free of this problem, is demonstrated. This material is obtained by the reaction of tungsten chloride with hexanol, which induces transformation of the precursor solution into stable colloidal particles. The best solar cell, with the WOx electron transport layer, achieved an efficiency of 20.77%, which is a record performance for this class of perovskite solar cells.
中文翻译：
低温加工的WOx作为平面钙钛矿太阳能电池的电子传输层，效率超过20％
低温固溶处理的金属氧化物作为钙钛矿太阳能电池中电子传输层的替代材料备受关注。WO x是有前途的候选者，可以真正实现低温（<100°C）处理。但是，通常在固溶过程中获得的非晶态形式具有高缺陷密度。这导致大量的电荷复合，并且因此导致太阳能电池效率的显着降低。本文中，是一种超低温处理的（50°C）纳米晶WO x作为电子传输层，证明了没有这个问题。该材料是通过氯化钨与己醇的反应而获得的，后者可诱导前体溶液转化为稳定的胶体颗粒。具有WO x电子传输层的最佳太阳能电池的效率达到20.77％，这是此类钙钛矿太阳能电池的创纪录性能。
更新日期：2020-01-31
中文翻译：
低温加工的WOx作为平面钙钛矿太阳能电池的电子传输层，效率超过20％
低温固溶处理的金属氧化物作为钙钛矿太阳能电池中电子传输层的替代材料备受关注。WO x是有前途的候选者，可以真正实现低温（<100°C）处理。但是，通常在固溶过程中获得的非晶态形式具有高缺陷密度。这导致大量的电荷复合，并且因此导致太阳能电池效率的显着降低。本文中，是一种超低温处理的（50°C）纳米晶WO x作为电子传输层，证明了没有这个问题。该材料是通过氯化钨与己醇的反应而获得的，后者可诱导前体溶液转化为稳定的胶体颗粒。具有WO x电子传输层的最佳太阳能电池的效率达到20.77％，这是此类钙钛矿太阳能电池的创纪录性能。
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