Maximizing the open-circuit voltage of polymer : fullerene solar cells

J.C. Bijleveld, R.A.M. Verstrijden, M.M. Wienk, R.A.J. Janssen

Research output: Contribution to journalArticleAcademicpeer-review

39 Citations (Scopus)
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Abstract

The open-circuit voltage (Voc) of bulk heterojunction solar cells based on polymers and fullerene derivatives is limited to ~ 1.15 V by the optical band gap of the fullerene of ~ 1.75 eV and the required 0.6 eV offset for efficient charge generation. In practice this limit has not yet been reached. We present a semiconducting polymer that gives Voc = 1.15 V. To reach this value the surface of the hole collecting electrode is modified by UV-ozone, which increases the work function and creates an Ohmic contact. Under simulated AM1.5 conditions optimized cells provide a power conversion efficiency of - 1%.
Original languageEnglish
Article number073304
Pages (from-to)073304-1/3
JournalApplied Physics Letters
Volume97
Issue number7
DOIs
Publication statusPublished - 2010

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