文献类型：期刊文献

英文题名：Enhanced moisture stability of metal halide perovskite solar cells based on sulfur-oleylamine surface modification

作者：Hou, Yu[1];Zhou, Zi Ren[1];Wen, Tian Yu[1];Qiao, Hong Wei[1];Lin, Ze Qing[1];Ge, Bing[1];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：4

期号：1

起止页码：208

外文期刊名：NANOSCALE HORIZONS

收录：;EI(收录号：20194607688345);WOS:【SCI-EXPANDED(收录号:WOS:000453913200012)】；

基金：This study was financially supported by National Natural Science Foundation of China (51602103), National Natural Science Funds for Distinguished Young Scholar (51725201), Young Elite Scientists Sponsorship Program by CAST (2017QNRC001), Shanghai Pujiang Program (18PJD009), "Chen Guang" Project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation (15CG26), Fundamental Research Funds for the Central Universities (222201718002), and the Major Research plan of National Natural Science Foundation of China (91534202).

语种：英文

外文关键词：Efficiency - Moisture - Metal halides - Perovskite solar cells - Sulfur - Costs

摘要：As one of the most promising light-harvesting materials, perovskites have drawn tremendous attention for their unique advantages, such as high efficiency, low cost and facile fabrication compared with other photovoltaic materials. Nevertheless, poor moisture tolerance of the perovskites greatly hampers the operation of such devices and hinders their commercialization. Herein, we demonstrate a facile dipping treatment using sulfur-oleylamine solution for surface atomic modulation of perovskite films. Oleylammonium polysulfides (OPs) would be self-assembled on the etched perovskite film as an ultrathin outer layer. This layer could passivate the surface chemical activity of the outer perovskite layers. Moreover, the hydrophobic OPs significantly enhance moisture stability of such devices. As a result, the obtained device without encapsulation retains more than 70% of its initial power conversion efficiency (PCE) after 14 days of exposure to a relative humidity of 40 +/- 10%.