Charge Photogeneration and Transport in AgBiS2 Nanocrystal Films for Photovoltaics

Abstract

Solution‐processed AgBiS2 nanocrystal films are a promising material for nontoxic, earth‐abundant solar cells. While solar cells with good device efficiency are demonstrated, so far, hardly anything is known about charge generation, transport, and recombination processes in these films. Here, a photoinduced time‐resolved microwave conductivity study on AgBiS2 nanocrystal films is presented. By modeling the experimental data with density‐dependent recombination processes, the product of the temperature‐dependent electron and hole quantum yield and mobility, and the electron and hole recombination kinetics are determined.