Charge Photogeneration and Transport in AgBiS2 Nanocrystal Films for Photovoltaics

"Charge Photogeneration and Transport in AgBiS2 Nanocrystal Films for Photovoltaics" Silke L. Diedenhofen,* Maria Bernechea,* Kevin M. Felter, Ferdinand C. Grozema, and Laurens D. A. Siebbeles Sol. RRL 2019, 1900075

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.