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language
eng
Author
Mada, Shin-ichiro
Inoue, Ayumi
Yoshida, Yuki
Tanaka, Senku
Description
The internal electric field in a heterojunction solar cell made of poly(5-(2'-ethylhexyloxy)-2-methoxy-1,4-phenylenevinylene) (MEH-PPV) as a donor and 3,4,9,10-perylene-tetracarboxyl-bis-benzimidazole (PTCBI) as an acceptor is studied by electroabsorption (EA). The 1ω-EA signal detected at the fundamental electric-field-modulation frequency ω comes from the bulk of the film for MEH-PPV but from the interface of the film for PTCBI. The bias dependence of the bulk electric field for MEH-PPV is correlated with that of the photocurrent generated by MEH-PPV excitation, indicating that the electric field has an essential role in carrier photogeneration. An analysis of the photocurrent action spectrum indicates that the photocurrent-active region in the MEH-PPV layer changes its location depending on the applied bias voltage. This suggests that the region of strong electric field in the MEH-PPV layer changes its location along with the active layer.
Subject
solar cells
heterojunction
organic semiconductors
conducting polymers
electroabsorption
Journal Title
Japanese Journal of Applied Physics
Volume
46
Issue
11
Start Page
7241
End Page
7246
ISSN
00214922
Published Date
2007-11-15
DOI
DOI Date
2016-01-08
NCID
AA12295836
Publisher
公益社団法人応用物理学会
Publisher Aalternative
Japanese Journal of Applied Physics
NII Type
Journal Article
Format
PDF
Rights
公益社団法人応用物理学会
Text Version
著者版
OAI-PMH Set
Interdisciplinary Graduate School of Science and Engineering
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