| File | |
| Title |
Organic thin-film solar cells with a Cu anode : Improvement of the photovoltaic properties on aging in air
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| Creator |
Yoshida Yuki
Tanaka Senku
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| Source Title |
Journal of Applied Physics
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| Volume | 106 |
| Issue | 6 |
| Start Page | 064510-1 |
| End Page | 064510-8 |
| Journal Identifire |
ISSN 00218979
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| Descriptions |
The photovoltaic properties of a Ga-doped ZnO (GZO)/3,4,9,10-perylene-tetracarboxyl-bis-benzimidazole (PTCBI)/Zn-phthalocyanine (ZnPc)/Cu heterojunction cell(cell A) and a GZO/ZnPc/Cu Schottky-barriercell(cell B) were investigated. The energy conversion efficiency η of cell A was only 0.02% immediately after the device preparation but improved to 0.46% after aging for 24 days in air. To elucidate the mechanism of this aging effect, photocurrent action and electro-absorption spectra were measured for cell B. The results reveal that a Schottky barrier exists at the ZnPc/Cu interface which blocks the transport of photogenerated holes to the Cuelectrode, and the barrier height is reduced by a white-light illumination of the device after aging. The change in barrier height is attributed to the formation of electron traps at the surface of the ZnPc layer on aging that trap photogenerated electrons.
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Institute of Physics
|
| Date of Issued | 2009 |
| Rights |
© 2009 AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.
The following article appeared in Jour. Appl. Phys. 106, 064510 (2009). and may be found at http://dx.doi.org/10.1063/1.3226880.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Relation |
[DOI] 10.1063/1.3226880
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