Electronic transport properties of pentacene single crystals upon exposure to air

被引：132
作者：
Jurchescu, OD [1 ]
Baas, J [1 ]
Palstra, TTM [1 ]
机构：
[1] Univ Groningen, Solid State Chem Lab, Ctr Mat Sci, NL-9747 AG Groningen, Netherlands
来源：
APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 05期
关键词：
D O I：
10.1063/1.2001130
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report the effect of air exposure on the electronic properties of pentacene single crystals. Air can diffuse reversibly in and out of the crystals and influences the physical properties. We discern two competing mechanisms that modulate the electronic transport. The presence of oxygen increases the hole conduction, as in dark four O-2 molecules introduce one charge carrier. This effect is enhanced by the presence of visible light. Contrarily, water, present in ambient air, is incorporated in the crystal lattice and forms trapping sites for injected charges. (c) 2005 American Institute of Physics.
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