Efficient photoconductive devices at infrared wavelengths using quantum dot-polymer nanocomposites

K. Roy Choudhury; Y. Sahoo; T. Y. Ohulchanskyy; P. N. Prasad

doi:10.1063/1.2011768

Efficient photoconductive devices at infrared wavelengths using quantum dot-polymer nanocomposites

K. Roy Choudhury
, Y. Sahoo
, T. Y. Ohulchanskyy
, P. N. Prasad

SUNY Buffalo

Research output: Contribution to journal › Article › peer-review

110 Scopus citations

Abstract

We report high photoconductivity and narrow luminescence in nanocomposites of PbSe quantum dots in a polymeric matrix. The nanocomposites are photoactive at infrared wavelengths with narrow emission bands, tunable with the quantum dot sizes. The quantum dots sensitize the polymer at distinct wavelengths across the infrared range between 800 nm and 2 μm, by virtue of quantum-size effects. Photoconductivity measured in the nanocomposites results in a quantum efficiency of ∼3%, which is among the highest reported so far in this spectral range.

Original language	English
Article number	073110
Journal	Applied Physics Letters
Volume	87
Issue number	7
DOIs	https://doi.org/10.1063/1.2011768
State	Published - Aug 15 2005

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abstract = "We report high photoconductivity and narrow luminescence in nanocomposites of PbSe quantum dots in a polymeric matrix. The nanocomposites are photoactive at infrared wavelengths with narrow emission bands, tunable with the quantum dot sizes. The quantum dots sensitize the polymer at distinct wavelengths across the infrared range between 800 nm and 2 μm, by virtue of quantum-size effects. Photoconductivity measured in the nanocomposites results in a quantum efficiency of ∼3\%, which is among the highest reported so far in this spectral range.",

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AU - Prasad, P. N.

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N2 - We report high photoconductivity and narrow luminescence in nanocomposites of PbSe quantum dots in a polymeric matrix. The nanocomposites are photoactive at infrared wavelengths with narrow emission bands, tunable with the quantum dot sizes. The quantum dots sensitize the polymer at distinct wavelengths across the infrared range between 800 nm and 2 μm, by virtue of quantum-size effects. Photoconductivity measured in the nanocomposites results in a quantum efficiency of ∼3%, which is among the highest reported so far in this spectral range.

AB - We report high photoconductivity and narrow luminescence in nanocomposites of PbSe quantum dots in a polymeric matrix. The nanocomposites are photoactive at infrared wavelengths with narrow emission bands, tunable with the quantum dot sizes. The quantum dots sensitize the polymer at distinct wavelengths across the infrared range between 800 nm and 2 μm, by virtue of quantum-size effects. Photoconductivity measured in the nanocomposites results in a quantum efficiency of ∼3%, which is among the highest reported so far in this spectral range.

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Efficient photoconductive devices at infrared wavelengths using quantum dot-polymer nanocomposites

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