Plasmonic light trapping leads to responsivity increase in colloidal quantum dot photodetectors
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 lm for 400 nm thick devices. Additionally, we study the effect of the mode structure on the efficiency of light trapping provided by random nanoparticle...[Show more]
|Collections||ANU Research Publications|
|Source:||Applied Physics Letters|
|01_Pelayo García de Arquer_Plasmonic_light_trapping_leads_2012.pdf||Published Version||1.3 MB||Adobe PDF|
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