Polymer morphology and energy levels versus photoelectric power conversion efficiencies: a preliminary account

Sam Shajing Sun

doi:10.1117/12.559095

3 November 2004 Polymer morphology and energy levels versus photoelectric power conversion efficiencies: a preliminary account

Sam Shajing Sun

Author Affiliations +

Proceedings Volume 5520, Organic Photovoltaics V; (2004) https://doi.org/10.1117/12.559095
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

Citation Download Citation

Sam Shajing Sun "Polymer morphology and energy levels versus photoelectric power conversion efficiencies: a preliminary account", Proc. SPIE 5520, Organic Photovoltaics V, (3 November 2004); https://doi.org/10.1117/12.559095

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