Perpustakaan Digital ITB

Organolead trihalide perovskite materials have attractedconsiderable interest because of their successful application in fabricatinghigh-efficiency photovoltaic cells. Charge transport layers play a significant rolein improving the efficiency and stability of perovskite solar cells (PSCs). In thiswork, we investigated the p-type doping effect of the poly(triarylamine)(PTAA) layer on the performance of PSCs by using three dopants. We observethat doping copper(I) thiocyanate (CuSCN) into PTAA led to a higherperformance improvement for the PSCs than the use of copper(I) iodide (CuI)or lithium salt (Li-TFSI) as the dopant. The power conversion efficiency (PCE)of the PSCs significantly improved from 14.22% to 18.16% upon doping 2.0 wt% CuSCN with simultaneously enhanced open-circuit voltage, short-circuitcurrent density, andfill factor. The long-term stability of the PSCs was alsoimproved with significantly reduced PCE degradation (from 79% to 25%) after200 h. Our results provide a simple method to improve the performance of planar PSCs by adding dopants into PTAA.