Photoconductivity from PbS-nanocrystal/semiconducting polymer composites for solution-processible, quantum-size tunable infrared photodetectors

S. A. McDonald; P. W. Cyr; L. Levina; E. H. Sargent

doi:10.1063/1.1792380

Photoconductivity from PbS-nanocrystal/semiconducting polymer composites for solution-processible, quantum-size tunable infrared photodetectors

S. A. McDonald^*, P. W. Cyr, L. Levina, E. H. Sargent

^*Corresponding author for this work

Chemistry

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

145 Scopus citations

Abstract

The phenomena of photoconductivity at infrared wavelengths in the range of 975-1300 nm, from PbS-nanocrystal(NC)/semiconducting polymer composites for solution-processible, quantum-size tunable infrared photodetector, was analyzed. Photocurrent at wavelengths beyond the response of polymer and corresponding to absorption of NC were also demonstrated by conjugated polymer poly[2-methoxy-5-(2′-ethylexyloxy-p-phenylenevinylene) (MEH-PPV) sensitized with PbS NC. The photogenerated holes in PbS-NC were trnasferred to MEH-PPV, resulting in photoconductance, upon illumination. The results show that photocurrent indicates an internal quantum efficiency of ∼5×10 ^-6 to ∼10^-5 charges/photon.

Original language	English (US)
Pages (from-to)	2089-2091
Number of pages	3
Journal	Applied Physics Letters
Volume	85
Issue number	11
DOIs	https://doi.org/10.1063/1.1792380
State	Published - Sep 13 2004

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.1792380

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@article{044044dcb8cb4797854b91cf5617e28d,

title = "Photoconductivity from PbS-nanocrystal/semiconducting polymer composites for solution-processible, quantum-size tunable infrared photodetectors",

abstract = "The phenomena of photoconductivity at infrared wavelengths in the range of 975-1300 nm, from PbS-nanocrystal(NC)/semiconducting polymer composites for solution-processible, quantum-size tunable infrared photodetector, was analyzed. Photocurrent at wavelengths beyond the response of polymer and corresponding to absorption of NC were also demonstrated by conjugated polymer poly[2-methoxy-5-(2′-ethylexyloxy-p-phenylenevinylene) (MEH-PPV) sensitized with PbS NC. The photogenerated holes in PbS-NC were trnasferred to MEH-PPV, resulting in photoconductance, upon illumination. The results show that photocurrent indicates an internal quantum efficiency of ∼5×10 -6 to ∼10-5 charges/photon.",

author = "McDonald, {S. A.} and Cyr, {P. W.} and L. Levina and Sargent, {E. H.}",

note = "Funding Information: The authors gratefully acknowledge the support of Nortel Networks, the Natural Sciences and Engineering Research Council of Canada under the Collaborative Research and Development Program, Materials and Manufacturing Ontario, the Canada Research Chairs Program, the Canada Foundation for Innovation, and the Ontario Innovation Trust, and would like to thank L. Bakueva for many helpful discussions and V. Sukhovatkin for assistance in tunable laser-based investigations of the devices reported herein.",

year = "2004",

month = sep,

day = "13",

doi = "10.1063/1.1792380",

language = "English (US)",

volume = "85",

pages = "2089--2091",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "11",

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T1 - Photoconductivity from PbS-nanocrystal/semiconducting polymer composites for solution-processible, quantum-size tunable infrared photodetectors

AU - McDonald, S. A.

AU - Cyr, P. W.

AU - Levina, L.

AU - Sargent, E. H.

N1 - Funding Information: The authors gratefully acknowledge the support of Nortel Networks, the Natural Sciences and Engineering Research Council of Canada under the Collaborative Research and Development Program, Materials and Manufacturing Ontario, the Canada Research Chairs Program, the Canada Foundation for Innovation, and the Ontario Innovation Trust, and would like to thank L. Bakueva for many helpful discussions and V. Sukhovatkin for assistance in tunable laser-based investigations of the devices reported herein.

PY - 2004/9/13

Y1 - 2004/9/13

N2 - The phenomena of photoconductivity at infrared wavelengths in the range of 975-1300 nm, from PbS-nanocrystal(NC)/semiconducting polymer composites for solution-processible, quantum-size tunable infrared photodetector, was analyzed. Photocurrent at wavelengths beyond the response of polymer and corresponding to absorption of NC were also demonstrated by conjugated polymer poly[2-methoxy-5-(2′-ethylexyloxy-p-phenylenevinylene) (MEH-PPV) sensitized with PbS NC. The photogenerated holes in PbS-NC were trnasferred to MEH-PPV, resulting in photoconductance, upon illumination. The results show that photocurrent indicates an internal quantum efficiency of ∼5×10 -6 to ∼10-5 charges/photon.

AB - The phenomena of photoconductivity at infrared wavelengths in the range of 975-1300 nm, from PbS-nanocrystal(NC)/semiconducting polymer composites for solution-processible, quantum-size tunable infrared photodetector, was analyzed. Photocurrent at wavelengths beyond the response of polymer and corresponding to absorption of NC were also demonstrated by conjugated polymer poly[2-methoxy-5-(2′-ethylexyloxy-p-phenylenevinylene) (MEH-PPV) sensitized with PbS NC. The photogenerated holes in PbS-NC were trnasferred to MEH-PPV, resulting in photoconductance, upon illumination. The results show that photocurrent indicates an internal quantum efficiency of ∼5×10 -6 to ∼10-5 charges/photon.

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Photoconductivity from PbS-nanocrystal/semiconducting polymer composites for solution-processible, quantum-size tunable infrared photodetectors

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