Charge Photogeneration and Transport in AgBiS2 Nanocrystal Films for Photovoltaics

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 phot...

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Bibliographic Details
Published in:Solar RRL 2019-08, Vol.3 (8), p.n/a
Main Authors: Diedenhofen, Silke L., Bernechea, Maria, Felter, Kevin M., Grozema, Ferdinand C., Siebbeles, Laurens D. A.
Format: Article
Language:English
Subjects:
AgBiS2 nanocrystals
charge decay
charge mobility
diffusion length
microwave conductivity
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Summary: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. AgBiS2 nanocrystal films are a promising material for solar cells. Time‐resolved microwave conductivity experiments are performed on these films. The product of quantum yield and mobility, the decay kinetics of photogenerated charge carriers, and the diffusion lengths are determined by modeling the experimental data. The results demonstrate the potential for these films in photovoltaics.
ISSN:2367-198X
2367-198X
DOI:10.1002/solr.201900075