Solution-processable pyrite FeS(2) nanocrystals for the fabrication of heterojunction photodiodes with visible to NIR photodetection.
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) ).
Department of Materials Science and Engineering, National Taiwan University, Taipei, 106, Taiwan.
Di-Yan
DY
Wang
You-Ting
YT
Jiang
Chih-Cheng
CC
Lin
Shao-Sian
SS
Li
Yaw-Tyng
YT
Wang
Chia-Chun
CC
Chen
Chun-Wei
CW
Chen
D006046:Gold / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008982:Molybdenum / Q000737:chemistry; D010087:Oxides / Q000737:chemistry; D055668:Photochemical Processes; D013053:Spectrophotometry; D013440:Sulfides / Q000737:chemistry*; D017971:Tin Compounds / Q000737:chemistry; D015034:Zinc Oxide / Q000737:chemistry
D010087:Oxides; D013440:Sulfides; D017971:Tin Compounds; C011342:pyrite; C082290:molybdenum trioxide; C109984:indium tin oxide; D006046:Gold; D008982:Molybdenum; D007501:Iron; D015034:Zinc Oxide