Jpn. J. Appl. Phys. 42 (2003) pp. L1478-L1480 |Next Article| |Table of Contents|
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Letter
High Electric Conductivity in a Naphthalene Tetracaboxylic Dianhydride Film Molecularly Doped with Indium
Ken-ichi Nakayama,
Yasuro Niguma,
Yoshitaka Matsui and
Masaaki Yokoyama
Material and Life Science, Graduate School of Engineering, Osaka University, Yamadaoka, Suita, Osaka 565-0871, Japan
(Received September 18, 2003; accepted October 17, 2003; published November 18, 2003)
High electric conductivity exceeding 10-2 S/cm was observed in a co-deposited film of 1,4,5,8-naphthalene-tetracarboxylic-dianhydride (NTCDA) and indium, exhibiting electronic interaction characterized by remarkable changes of electronic absorption and electron spin resonance (ESR). The increase of conductivity was attributed to charge transfer from indium to the carbonyl oxygen of NTCDA, and therefore, was strongly dependent on the chemical structure of organic molecules. This result suggests a new guiding principle of chemical doping in low-molecular semiconductors, utilizing chemical interactions peculiar to the combination of molecules and metals.
URL:
http://jjap.jsap.jp/link?JJAP/42/L1478/
DOI: 10.1143/JJAP.42.L1478
KEYWORDS:organic semiconductor, doping, co-deposition, conductivity, electronic interaction
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