Tuning acceptor energy level for efficient charge collection in copper-phthalocyanine-based organic solar cells

Chih Wei Chu, Vishal Shrotriya, Gang Li, Yang Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

127 Citations (Scopus)

Abstract

We compare organic donor/acceptor heterojunction photovoltaic devices based on copper phthalocyanine (CuPc) as the donor and [6,6]-phenyl C60 butyric acid methyl ester (PCBM) or buckminsterfullerene (C60) as the acceptor. The effect of the two acceptors on open-circuit voltage and short-circuit current density is studied. Improved interface properties, optimal energy level matching, and more balanced charge transport are believed to be the reasons for better performance of CuPc/PCBM heterojunction device, in terms of photocurrent and fill factor. The energy conversion efficiency of the devices under AM1.5G solar illumination at 130 mW cm2 is improved to 1.18%, up from 0.74%.
Original languageEnglish
Article number153504
JournalApplied Physics Letters
Volume88
Issue number15
DOIs
Publication statusPublished - 10 Apr 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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