Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3118581
Keywords
carrier lifetime; epitaxial growth; field effect transistors; organic semiconductors; semiconductor diodes; semiconductor growth; semiconductor heterojunctions; semiconductor thin films
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Funding
- National Natural Science Foundation of China [50773079, 50803063]
- Special Funds for Major State Basic Research Projects [2009CB939702]
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Single-crystal-like organic heterojunction films of copper phthalocyanine (CuPc) and copper-hexadecafluoro-phthalocyanine (F16CuPc) were fabricated by weak-epitaxy-growth method. The intrinsic properties of organic heterojunction were revealed through threshold voltage shift of field-effect transistors and measurement of single-crystal-like diodes. At both sides of the heterojunction interface 40 nm thick charge accumulation layers formed, which showed that the long carriers' diffusion length is due to the high crystallinity and low density of deep bulk traps of single-crystal-like films. This also indicated the electronic properties of organic heterojunction can be adjusted by controlling the growth condition.
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