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Proceedings Paper

Enhancement in charge transfer by non-ligand exchange process for colloidal hybrid organic(MEH-PPV):inorganic(CdSe) nanocomposites
Author(s): Aarti Mehta; Shailesh N. Sharma; V. N. Singh; A. K. Srivastva; S. Chand
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Paper Abstract

In this work, we demonstrate the effect of surface modification of as-synthesized oleylamine-capped spherical CdSe QDs of size (5-7 nm). The as-prepared CdSe QDs are highly luminescent, monodispersive and exhibit energy transfer effects upon their dispersion in MEH-PPV polymer matrix. However, repetitive washing of CdSe QDs upon suitable chemical treatment leads to enhancement in charge transfer process as observed in their corresponding MEH-PPV: CdSe nanocomposites. Here, no evidence of agglomeration effects and surface states were found. This enhancement in charge transfer is mainly due to the partial removal of oleylamine capping ligand, which acts as a hindrance in the interaction between polymer and CdSe QDs. The importance of this study is that as-synthesized CdSe QDs show effective energy transfer whereas after chemical treatment, it shows enhanced charge transfer mechanism which makes their corresponding nanocomposites useful for different applications in organic electronic devices such as efficient electroluminescent (OLED) and photovoltaic (OPV) devices respectively.

Paper Details

Date Published: 15 October 2012
PDF: 6 pages
Proc. SPIE 8549, 16th International Workshop on Physics of Semiconductor Devices, 854933 (15 October 2012); doi: 10.1117/12.927334
Show Author Affiliations
Aarti Mehta, CSIR-National Physical Lab. (India)
Shailesh N. Sharma, CSIR-National Physical Lab. (India)
V. N. Singh, CSIR-National Physical Lab. (India)
Indian Institute of Technology (India)
A. K. Srivastva, CSIR-National Physical Lab. (India)
S. Chand, CSIR-National Physical Lab. (India)

Published in SPIE Proceedings Vol. 8549:
16th International Workshop on Physics of Semiconductor Devices
Monica Katiyar; B. Mazhari; Y N Mohapatra, Editor(s)

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