| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Heterojunction Effect in Weak Epitaxy Growth Thin Films Investigated by Kelvin Probe Force Microscopy |
HUANG Hai-Chao1,2, WANG Hai-Bo1,2, YAN Dong-Hang1 |
| 1State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 2Graduate School of Chinese Academy of Sciences, Beijing 100049 |
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| Cite this article: |
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HUANG Hai-Chao, WANG Hai-Bo, YAN Dong-Hang 2010 Chin. Phys. Lett. 27 086801 |
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Abstract We investigate the heterojunction effect between para-sexiphenyl (p-6P) and copper phthalocyanine (CuPc) using Kelvin probe force microscopy. CuPc films are grown on the inducing layer p-6P by a weak epitaxy growth technique. The surface potential images of Kelvin probe force microscopy indicate the band bending in CuPc, which reduces grain boundary barriers and lead to the accumulation of holes in the CuPc layer. The electrical potential distribution on the surface of heterojunction films shows negligible grain boundary barriers in the CuPc layers. The relation between band bending and grain boundary barrier in the weak epitaxy growth thin films is revealed.
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| Keywords:
68.35.-p
07.79.-v
73.61.Ph
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Received: 30 April 2010
Published: 28 July 2010
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| PACS: |
68.35.-p
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(Solid surfaces and solid-solid interfaces: structure and energetics)
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07.79.-v
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(Scanning probe microscopes and components)
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73.61.Ph
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(Polymers; organic compounds)
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