A heterojunction photodiode with NIR photoresponse using solution processable pyrite FeS 2 nanocrystal ink is demonstrated which has the advantages of earth-abundance and non-toxicity. The device consists of a FeS 2 nanocrystal (NC) thin film sandwiched with semiconducting metal oxides with a structure of ITO/ZnO/FeS 2 NC/MoO 3/Au, which exhibits an excellent photoresponse with a spectral response extended to NIR wavelengths of up to 1150 nm and a high photocurrent/dark current ratio of up to 8000 at -1 V under AM1.5 illumination (100 mW cm -2).
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
Wang, D. Y., Jiang, Y. T., Lin, C. C., Li, S. S., Wang, Y. T., Chen, C. C., & Chen, C. W. (2012). Solution-processable pyrite FeS 2 nanocrystals for the fabrication of heterojunction photodiodes with visible to NIR photodetection. Advanced Materials, 24(25), 3415-3420. https://doi.org/10.1002/adma.201200753