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Proceedings Paper

Polymer morphology and energy levels versus photoelectric power conversion efficiencies: a preliminary account
Author(s): Sam Shajing Sun
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Paper Abstract

Optimization of polymeric/organic solar cells in both space (morphology) and energy (time) domains has been preliminarily examined, both experimentally and theoretically, in order to minimize the 'photon loss', the 'exciton loss' and the 'carrier loss'. In spatial domain optimization, for instance, thin films of the -donor-bridge-acceptor-bridge- (-DBAB-) type block copolymer exhibited much higher photoluminescence quenching and photoconductivity in comparison to corresponding donor/acceptor simple blend films under identical conditions. This enhancement of photoelectric conversion was attributed mainly to the improved bicontinuous morphologies in the -DBAB- block copolymer versus the donor/acceptor simple blend. In energy/time domain optimization, preliminary theoretical simulation reveals that, an optimum exciton-charge conversion can be achieved when the frontier orbital offset of donor/acceptor pair is close to the sum of exciton binding energy and the charge separation reorganization energy.

Paper Details

Date Published: 3 November 2004
PDF: 10 pages
Proc. SPIE 5520, Organic Photovoltaics V, (3 November 2004); doi: 10.1117/12.559095
Show Author Affiliations
Sam Shajing Sun, Norfolk State Univ. (United States)


Published in SPIE Proceedings Vol. 5520:
Organic Photovoltaics V
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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