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Proceedings Paper

Integrated organic photovoltaic modules
Author(s): William J. Potscavage; Seunghyup Yoo; Benoit Domercq; Jungbae Kim; Joe Holt; Bernard Kippelen
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Paper Abstract

Methods for scalable output voltage and encapsulation of organic photovoltaic cells are addressed in this paper. To obtain scalable output voltages, integrated photovoltaic modules comprised of a bulk heterojunction of poly(3- hexylthiophene) (P3HT) and a soluble C70 derivative, [6,6]-phenyl C71 butyric acid methyl ester (PCBM-70), were fabricated. Power conversion efficiency of individual P3HT/PCBM-70 cells was estimated to be 4.1 % for AM1.5 G illumination. Modules of one to four cells connected in series produced open-circuit voltages VOC that linearly depend on the number of cells N as VOC = N × 0.621 V with a nearly constant short-circuit current of 1.4 ± 0.1 mA. Separately, shelf lifetimes of more than one year were achieved for pentacene/C60 solar cells by encapsulation with a 200-nm-thick layer of Al2O3 deposited by atomic layer deposition (ALD). In addition, the ALD process improved the open-circuit voltage and power conversion efficiency of the solar cells by thermal annealing that occurs during the process.

Paper Details

Date Published: 17 October 2007
PDF: 10 pages
Proc. SPIE 6656, Organic Photovoltaics VIII, 66560R (17 October 2007); doi: 10.1117/12.735320
Show Author Affiliations
William J. Potscavage, Georgia Institute of Technology (United States)
Seunghyup Yoo, Georgia Institute of Technology (United States)
Benoit Domercq, Georgia Institute of Technology (United States)
Jungbae Kim, Georgia Institute of Technology (United States)
Joe Holt, Georgia Institute of Technology (United States)
Bernard Kippelen, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 6656:
Organic Photovoltaics VIII
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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