Crystals 2012, 2(1), 78-89; doi:10.3390/cryst2010078
Article

Influence of Semiconductor Nanocrystal Concentration on Polymer Hole Transport in Hybrid Nanocomposites

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Received: 1 November 2011; in revised form: 30 December 2011 / Accepted: 10 January 2012 / Published: 16 January 2012
(This article belongs to the Special Issue Semiconductor Nanocrystals)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: This article investigates hole transport in poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV)/CdSe colloidal quantum dot (CQD) nanocomposites using a modified time-of-flight photoconductivity technique. The measured hole drift mobilities are analyzed in the context of Bässler’s Gaussian disorder model and the correlated disorder model in order to determine the polymer internal morphology of hybrid nanocomposite thin films. This work shows that increasing the CdSe CQD concentration decreases the polymer hole mobility from ~5.9 × 106 cm2/Vs in an MEH-PPV film to ~8.1 × 108 cm2/Vs in a 20:80 (wt%) MEH-PPV:CdSe CQD nanocomposite film (measured at 25 °C and ~2 × 105 V/cm). The corresponding disorder parameters indicate increasing disruption of interchain interaction with increasing CQD concentration. This work quantifies polymer chain morphology in hybrid nanocomposite thin films and provides useful information regarding the optimal use of semiconductor nanocrystals in conjugated polymer-based optoelectronics.
Keywords: hybrid nanocomposites; hole drift mobility; time-of-flight photoconductivity; amorphous disorder models
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MDPI and ACS Style

Pate, R.; Stiff-Roberts, A.D. Influence of Semiconductor Nanocrystal Concentration on Polymer Hole Transport in Hybrid Nanocomposites. Crystals 2012, 2, 78-89.

AMA Style

Pate R, Stiff-Roberts AD. Influence of Semiconductor Nanocrystal Concentration on Polymer Hole Transport in Hybrid Nanocomposites. Crystals. 2012; 2(1):78-89.

Chicago/Turabian Style

Pate, Ryan; Stiff-Roberts, Adrienne D. 2012. "Influence of Semiconductor Nanocrystal Concentration on Polymer Hole Transport in Hybrid Nanocomposites." Crystals 2, no. 1: 78-89.

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