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Correlation of open-circuit voltage and energy levels in zinc-phthalocyanine: C₆₀ bulk heterojunction solar cells with varied mixing ratio

Abstract:

The maximum open-circuit voltage VOC of bulk-heterojunction solar cells is limited by the effective HOMO(donor)-LUMO(acceptor) gap of the photoactive absorber blend. We investigate blend layers comprising zinc-phthalocyanine (ZnPc) and the buckminster fullerene C60 with ultraviolet, x-ray, and inverse photoelectron spectroscopy. By varying the volume mixing ratio ZnPc:C60 from 6:1 to 1:6, we observe a linear increase of the HOMO(ZnPc)-LUMO(C60

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevB.88.085119

Authors


Tietze, ML More by this author
Pfützner, S More by this author
Schünemann, C More by this author
Burtone, L More by this author
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Publisher:
American Physical Society Publisher's website
Journal:
Physical Review B - Condensed Matter and Materials Physics Journal website
Volume:
88
Issue:
8
Pages:
Article: 085119
Publication date:
2013-08-20
DOI:
EISSN:
1550-235X
ISSN:
1098-0121
URN:
uuid:6e6d4b72-f694-4d89-9c32-5c2e50b79345
Source identifiers:
433170
Local pid:
pubs:433170
Language:
English

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