钝化
材料科学
钙钛矿(结构)
图层(电子)
能量转换效率
介孔材料
化学工程
纳米技术
光电子学
化学
催化作用
有机化学
工程类
作者
Vahid Hoseinpour,Zahra Shariatinia,Saba Mahmoodpour
标识
DOI:10.1016/j.optmat.2022.112746
摘要
Boosted performances were measured for perovskite solar cells (PSCs) through interface engineering via surface passivation using p-toluenesulfonamide (PTSA) between the CH3NH3PbI3 (MAPbI3) and CuInS2 (CIS) hole transporting layer (HTL) films in ambient environment. All PSCs were assembled with an inexpensive architecture: FTO/block-TiO2 (b-TiO2)/mesoporous TiO2 (m-TiO2)/MAPbI3/CIS/carbon. Furthermore, to explore PTSA-x-y effects onto the PSCs performances, the PTSA concentration (x) and layer number (y) were varied. For this purpose, two PTSA concentrations of 50 and 100 mg/mL along with up to four layer numbers were spin-coated over the MAPbI3 film. The optimum PTSA concentration was found to be PTSA-50-2 indicating two layers of 50 mg/mL were coated on the perovskite layer. The SEM images exhibited that the PTSA-50-2 and PTSA-100-1 films had homogeneous surfaces without any pin-holes or tracks which were highly desirable to achieve high efficiency. The champion PSC contained the PTSA-50-2 interface layer which displayed the utmost power conversion efficiency (PCE) of 11.24% (JSC = 21.32 mA cm−2, VOC = 913.96 mV, FF = 0.58) demonstrating 64% PCE enhancement in comparison to that of champion reference cell assembled without PTSA film (PCE = 6.85%). Hence, surface passivation of the MAPbI3 perovskite by the PTSA was an appropriate approach to fabricate large scale and cost-effective PSCs.
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