Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3109785
Keywords
electrical conductivity; energy gap; organic semiconductors; phototransistors
Categories
Funding
- National Natural Science Foundation of China [20721061, 50725311, 60736004, 60771031]
- Ministry of Science and Technology of China [2006CB806200, 2006CB932100]
- Chinese Academy of Science
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Classical p-type and n-type organic single crystals, tetrathiafulvalene (TTF) and 7,7,8,8-tetracyanoquinodimethane (TCNQ), are introduced to investigate photoswitch and phototransistor. High photoresponsivity, low persistent conductivity, and response reversibility can be found in single crystalline TCNQ, while TTF has large persistent conductivity when the light is switched on and off. It is probably attributed to different band gaps and the compactness of molecular packing. Single crystalline TCNQ combines light detection, switching, signal amplification in a single device and realization of multiple functions which exhibit a very promising potential for the fabrication of organic photoelectric devices.
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