Effects of intrinsic layer thickness on solar cell parameters of organic p - i - n heterojunction photovoltaic cells

We fabricated organic p - i - n heterojunction photovoltaic cells of a zinc phthalocyanine (ZnPc)∕1:1 codeposition ( Zn Pc : C 60 ) ∕ C 60 structure. We investigated the effects of the intrinsic ( i -) layer thickness on the photovoltaic properties. The thickness was changed from 0 nm ( = p - n hete...

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Bibliographic Details
Published in:Applied physics letters 2004-12, Vol.85 (26), p.6412-6414
Main Authors: Taima, Tetsuya, Chikamatsu, Masayuki, Yoshida, Yuji, Saito, Kazuhiro, Yase, Kiyoshi
Format: Article
Language:English
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Summary:We fabricated organic p - i - n heterojunction photovoltaic cells of a zinc phthalocyanine (ZnPc)∕1:1 codeposition ( Zn Pc : C 60 ) ∕ C 60 structure. We investigated the effects of the intrinsic ( i -) layer thickness on the photovoltaic properties. The thickness was changed from 0 nm ( = p - n heterojunction) to 50 nm ( = all i -layer) with the total thickness of 50 nm. While the short-circuit photocurrent increased with increasing the thickness, the fill factor showed the opposite tendency. Therefore, the power conversion efficiency showed a maximum (1.5%) at the thickness of 10 nm under air mass 1.5 global solar conditions. Device simulation based on idealized equivalent circuit of a solar cell demonstrates that the i -layer thickness is concerned in the series resistance of the cells.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1841479