Department of Materials Science and Engineering, National Taiwan University, Taipei, 106, Taiwan.
Adv Mater. 2012 Jul 3;24(25):3415-20. doi: 10.1002/adma.201200753. Epub 2012 Jun 5.
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) ).
采用溶液处理的黄铁矿 FeS(2) 纳米晶油墨制作的具有近红外光响应的异质结光电二极管，具有丰富的地球储量和无毒的优点。该器件由夹在半导体金属氧化物之间的 FeS(2) 纳米晶 (NC) 薄膜组成，结构为 ITO/ZnO/FeS(2) NC/MoO(3)/Au，在 AM1.5 照明（100 mW cm(-2)）下，光谱响应扩展至近红外波长高达 1150nm，光电流/暗电流比高达 8000，表现出优异的光响应。
