Influence of the Preparation Method on Planar Perovskite CH₃NH₃PbI_3-xCl_x Solar Cell Performance and Hysteresis

Abstract

Organometal halide perovskites are promising materials for lowcost, high-efficiency solar cells. The method of perovskite layer deposition and the interfacial layers play an important role in determining the efficiency of perovskite solar cells (PSCs). In the paper, we demonstrate inverted planar perovskite solar cells where perovskite layers are deposited by two-step modified interdiffusion and one-step methods. We also demonstrate how PSC parameters change by doping of charge transport layers (CTL). We used dimethylsupoxide (DMSO) as dopant for the hole transport layer (PEDOT:PSS) but for the electron transport layer [6,6]-phenyl C 61 butyric acid methyl ester (PCBM)) we used N,N-dimethyl-N-octadecyl(3-aminopropyl)trimethoxysilyl chloride (DMOAP).The highest main PSC parameters (PCE, EQE, V OC ) were obtained for cells prepared by the one-step method with fast crystallization and doped CTLs but higher fill factor (FF) and shunt resistance (R sh ) values were obtained for cells prepared by the two-step method with undoped CTLs.

Perovskite CH3NH3PbI3–XClx Solar Cells. Experimental Study of Initial Degradation Kinetics and Fill Factor Spectral Dependence

“…Hypotheses to explain this phenomenon are offered in the present study. The inverted planar mixed halide perovskite solar cells were fabricated with the following layer configuration: glass/ ITO/PEDOT:PSS/CH 3 NH 3 PbI 3-x Cl x / PC 61 BM/C 60 /Ag, using spin-coating from the solutions in the ambient atmosphere and, for the C 60 and Ag electrode, by thermal vacuum evaporation -as reported previously [2]. The device structure, the energy level diagram of layers and the scheme of the experimental arrangement for in situ measurements are shown in Fig.…”