Theoretical analysis of composite polymer solar cell function

Vladimir M. Aroutiounian; Helmut Tributsch

doi:10.1117/12.456938

21 February 2002 Theoretical analysis of composite polymer solar cell function

Vladimir M. Aroutiounian, Helmut Tributsch

Proceedings Volume 4465, Organic Photovoltaics II; (2002) https://doi.org/10.1117/12.456938
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

Published information on polymer composite solar cells was screened to pin down the most critical parameters for a further improvement of these photovoltaic systems towards higher efficiency and stability. Largely irreversible separation of photocharge between the polymer (e.g. PPV) and the fullerene with subsequent percolation of electrons (e.g. to the Al contact) and holes (to the ITO contact), under the symmetry breaking influence of an electric field imposed by the work function difference of the contacts (Al and ITO respectively) accounts for photocurrent generation. The energetics is determined by n-p hetero junction, which is formed between ITO and the polymer/fullerene composite. Positive polarization of the ITO contact leads to the generation of an interfacial potential drop and an increase of the effective ITO work function. This explains the generation of a photovoltage reaching more than 0.8 Volt. Parameters limiting solar cell performance are discussed.

Citation Download Citation

Vladimir M. Aroutiounian and Helmut Tributsch "Theoretical analysis of composite polymer solar cell function", Proc. SPIE 4465, Organic Photovoltaics II, (21 February 2002); https://doi.org/10.1117/12.456938

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