Title :
Pentacene-Based Planar- and Vertical-Type Organic Thin-Film Transistor
Author :
Yang, Chuan-Yi ; Cheng, Shiau-Shin ; Ou, Tzu-Min ; Wu, Meng-Chyi ; Wu, Chun-Hung ; Chao, Che-Hsi ; Lin, Shih-Yen ; Chan, Yi-Jen
Author_Institution :
Nat. Tsing Hua Univ., Hsinchu
fDate :
7/1/2007 12:00:00 AM
Abstract :
Pentacene-based planar- and vertical-type organic thin-film transistors (OTFTs) are investigated in this paper. High operation voltages are observed for the planar-type OTFTs with top source/drain electrodes, which results from the limitations of channel length and low material mobility. With a reduced channel length, a LiF hole-injection enhancement layer, and a thin metal gate, the vertical-type pentacene OTFTs exhibit a low-voltage operation of less than 5 V and a compatible on/off ratio of larger than 102. The smaller current gain observed from the device under current modulation is attributed to the increase of base recombination current under the common-emitter mode.
Keywords :
electrodes; lithium compounds; low-power electronics; organic compounds; thin film transistors; LiF - Binary; common-emitter mode; high operation voltages; hole-injection enhancement layer; low-voltage operation; planar-type organic thin-film transistor; thin metal gate; top source/drain electrodes; vertical-type organic thin-film transistor; vertical-type pentacene OTFT; Chaos; Electrodes; Industrial electronics; Laboratories; Organic materials; Organic thin film transistors; Pentacene; Substrates; Thin film transistors; Voltage; Organic thin-film transistor (OTFT); organic triode; pentacene; vertical organic transistor;
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2007.898672
