Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology; School of Materials Science & Engineering, Shaanxi Normal University , Xi'an 710119, P. R. China.
Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences , Dalian 116023, P. R. China.
ACS Appl Mater Interfaces. 2017 Jan 25;9(3):2421-2429. doi: 10.1021/acsami.6b13362. Epub 2017 Jan 12.
Electron transport layer (ETL), facilitating charge carrier separation and electron extraction, is a key component in planar perovskite solar cells (PSCs). We developed an effective ETL using low-temperature solution-processed Nb-doped SnO (Nb:SnO). Compared to the pristine SnO, the power conversion efficiency of PSCs based on Nb:SnO ETL is raised to 17.57% from 15.13%. The splendid performance is attributed to the excellent optical and electronic properties of the Nb:SnO material, such as smooth surface, high electron mobility, appropriate electrical conductivity, therefore making a better growth platform for a high quality perovskite absorber layer. Experimental analyses reveal that the Nb:SnO ETL significantly enhances the electron extraction and effectively suppresses charge recombination, leading to improved solar cell performance.
电子传输层（ETL），促进载流子分离和电子提取，是平面钙钛矿太阳能电池（PSCs）的关键组成部分。我们使用低温溶液处理的掺铌氧化锡（Nb:SnO）开发了一种有效的 ETL。与原始的 SnO 相比，基于 Nb:SnO ETL 的 PSCs 的功率转换效率从 15.13%提高到 17.57%。优异的性能归因于 Nb:SnO 材料的出色的光学和电子性能，例如光滑的表面、高电子迁移率、适当的电导率，因此为高质量钙钛矿吸收层提供了更好的生长平台。实验分析表明，Nb:SnO ETL 显著增强了电子提取并有效抑制了电荷复合，从而提高了太阳能电池的性能。
