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Issue 24, 2013
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Water-soluble CdTe quantum dots as an anode interlayer for solution-processed near infrared polymer photodetectors

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Abstract

Water-soluble cadmium telluride (CdTe) quantum dots (QDs) used as an anode interlayer in solution-processed near infrared (NIR) polymer photodetectors (PDs) were demonstrated. Polymer PDs incorporated with CdTe QDs as an anode interlayer exhibited 10-fold suppressed dark current density and analogous photocurrent density relative to poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), which resulted in enhanced detectivities over 1011 Jones in the spectral range from 350 nm to 900 nm. Moreover, with the substitution of PEDOT:PSS by CdTe QDs, the stability of unencapsulated NIR polymer PDs was extended up to 650 hours, which is more than 3 times longer than those with PEDOT:PSS as an anode interlayer. These results indicated that CdTe QDs can be utilized as a solution-processable alternative to PEDOT:PSS as an anode interlayer for high performance NIR polymer PDs.

Graphical abstract: Water-soluble CdTe quantum dots as an anode interlayer for solution-processed near infrared polymer photodetectors

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Article information


Submitted
13 Jul 2013
Accepted
02 Oct 2013
First published
09 Oct 2013

Nanoscale, 2013,5, 12474-12479
Article type
Paper

Water-soluble CdTe quantum dots as an anode interlayer for solution-processed near infrared polymer photodetectors

X. Liu, J. Zhou, J. Zheng, M. L. Becker and X. Gong, Nanoscale, 2013, 5, 12474
DOI: 10.1039/C3NR03602B

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