Enhancing Organolead Halide Perovskite Solar Cells Performance Through Interfacial Engineering Using Ag-doped TiO 2 Hole Blocking Layer
Journal
Solar RRL
Journal Volume
2
Journal Issue
8
Pages
1800072
Date Issued
2018
Author(s)
Abstract
Various silver-doped titanium dioxide (Ag-TiO2) hole blocking layers are used to improve the organolead halide perovskite-structured solar cells (PSCs) performances. In this work, a series of Ag-TiO2 compact layers with various dopant levels are successfully synthesized, and they are used to fabricate PSCs. The silver doping effects on the morphology and physical properties of Ag-TiO2 compact layers are studied using X-ray diffractometer, UV-visible spectroscopy, contact angle meter, scanning electron microscope, atomic force microscope, and time-resolved photoluminescence spectroscopy. Furthermore, the photo-assisted Kelvin probe force microscopy is used to monitor the surface potentials. With 1.0 mol% Ag-TiO2 PSCs, the short-circuit current density increases notably because of the lower electron–hole recombination, which increases the electron injection. After optimizing the synthesis conditions, the champion device based on 1.0 mol% Ag-TiO2 exhibits a power conversion efficiency of 14.1% under AM 1.5 G irradiation (100 mW · cm−2).
SDGs
Type
journal article