Gao Feng, Zheng Qing, Zhang Ying
School of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, P. R. China.
ACS Omega. 2019 Feb 15;4(2):3432-3438. doi: 10.1021/acsomega.8b03629. eCollection 2019 Feb 28.
In this work, we developed a CHNHPbI perovskite solar cell with CuInS quantum dot-modified TiO nanoarrays (TiO-CuInS QD-NAs) as a scaffold layer. Based on the suitable device configuration, we achieved improved power conversion efficiency (PCE) of 13.3%, which was 38.3% higher than that of the device without QD modification (8.2%). After exposure to air for 30 days, the TiO-CuInS QD-NA-based device possessed a PCE of 5.4%, being 41% of the original performance, which was far superior to that of TiO nanoarray-based solar cells with a PCE of 1.1%. Our results showed that the crystallinity of perovskite, surface state, and interface for charge transport of TiO-CuInS QD-NA-based perovskites all remarkably improved, indicating the improved air stability for TiO-CuInS QD-NA-based solar cells.
在这项工作中，我们开发了一种以铜铟硫量子点修饰的二氧化钛纳米阵列（TiO-CuInS QD-NAs）作为支架层的CHNHPbI钙钛矿太阳能电池。基于合适的器件结构，我们实现了13.3%的功率转换效率（PCE）提升，比未进行量子点修饰的器件（8.2%）高出38.3%。在空气中暴露30天后，基于TiO-CuInS QD-NA的器件的功率转换效率为5.4%，是原始性能的41%，远优于基于TiO纳米阵列的太阳能电池，后者的功率转换效率为1.1%。我们的结果表明，基于TiO-CuInS QD-NA的钙钛矿的结晶度、表面状态以及电荷传输界面均得到显著改善，这表明基于TiO-CuInS QD-NA的太阳能电池的空气稳定性得到了提高。
