Kim, Hyun-Suk
(Department of Electrical Engineering, Korea University)
,
Park, Byung-Jun
(Department of Electrical Engineering, Korea University)
,
Kim, Jin-Hyoung
(Department of Electrical Engineering, Korea University)
,
Lee, Jun-Woo
(Department of Electrical Engineering, Korea University)
,
Kim, Dong-Won
(Department of Electrical Engineering, Korea University)
,
Cho, Kyoung-Ah
(Department of Electrical Engineering, Korea University)
,
Kim, Sang-Sig
(Department of Electrical Engineering, Korea University)
Photocurrent spectrum, photoresponse, and I-V measurements were made for close-packed HgTe nanoparticles without organic capping materials to investigate their photocurrent characteristics in the infrared range. In absorption and photoluminescence (PL) spectra taken for the close-packed nanoparticle...
Photocurrent spectrum, photoresponse, and I-V measurements were made for close-packed HgTe nanoparticles without organic capping materials to investigate their photocurrent characteristics in the infrared range. In absorption and photoluminescence (PL) spectra taken for the close-packed nanoparticles film, the wavelengths of exciton peaks was red-shifted, compared with organic capped HgTe nanoparticles dispersed in solution. This red-shift is caused by the lessening of the exciton binding energy. The I-V curves and photoresponse for the close-packed nanoparticles film reveal their dark current and fast photoresponse with no current decay, respectively. The observation suggests that the HgTe nanoparticles are a very prospect material applicable for photodetectors in the whole IR range.
Photocurrent spectrum, photoresponse, and I-V measurements were made for close-packed HgTe nanoparticles without organic capping materials to investigate their photocurrent characteristics in the infrared range. In absorption and photoluminescence (PL) spectra taken for the close-packed nanoparticles film, the wavelengths of exciton peaks was red-shifted, compared with organic capped HgTe nanoparticles dispersed in solution. This red-shift is caused by the lessening of the exciton binding energy. The I-V curves and photoresponse for the close-packed nanoparticles film reveal their dark current and fast photoresponse with no current decay, respectively. The observation suggests that the HgTe nanoparticles are a very prospect material applicable for photodetectors in the whole IR range.
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문제 정의
Moreover, photoexcited electrons may not transport in the hybrid system. In this study, in efforts to overcome these unwanted characteristics, optoelectronic properties of close-packed HgTe nanoparticles without organic capping materials are investigated.
이론/모형
1 -thioglycerol-capped HgTe nanoparticles were synthesized in aqueous solution by the colloidal method [3]. The HgTe nanoparticles powders were obtained by the centrifuge process after the addition of isopropyl alcohol.
성능/효과
The photocurrent measurement was performed at room temperature at a biased voltage of IV and has no amplification. It can be concluded that the HgTe nanoparticle is a promising material applicable for the photodetector operating in the whole IR range even though this experiment was performed in the near IR range.
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