Plasmonic light trapping leads to responsivity increase in colloidal quantum dot photodetectors
F Pelayo García de Arquer, FJ Beck… - Applied Physics …, 2012 - pubs.aip.org
We report broadband responsivity enhancement in PbS colloidal quantum dot (CQDs)
photoconductive photodetectors due to absorption increase offered by a plasmonic
scattering layer of Ag metal nanoparticles. Responsivity enhancements are observed in the
near infrared with a maximum 2.4-fold increase near the absorption band edge of∼ 1 μm
for∼ 400 nm thick devices. Additionally, we study the effect of the mode structure on the
efficiency of light trapping provided by random nanoparticle scattering in CQD films and …
photoconductive photodetectors due to absorption increase offered by a plasmonic
scattering layer of Ag metal nanoparticles. Responsivity enhancements are observed in the
near infrared with a maximum 2.4-fold increase near the absorption band edge of∼ 1 μm
for∼ 400 nm thick devices. Additionally, we study the effect of the mode structure on the
efficiency of light trapping provided by random nanoparticle scattering in CQD films and …
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