Photo-Stable Organic Thin-Film Transistor Utilizing a New Indolocarbazole Derivative for Image Pixel and Logic Applicationsopen access
- Authors
- Park, Ji Hoon; Lee, Hee Sung; Park, Soohyung; Min, Sung-Wook; Yi, Yeonjin; Cho, Cheon-Gyu; Han, Jiwon; Kim, Tae Woong; Im, Seongil
- Issue Date
- Feb-2014
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- organic electronics; indolocarbazole; electro-optical materials; field-effect transistors; sensor
- Citation
- ADVANCED FUNCTIONAL MATERIALS, v.24, no.8, pp.1109 - 1116
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED FUNCTIONAL MATERIALS
- Volume
- 24
- Number
- 8
- Start Page
- 1109
- End Page
- 1116
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/143625
- DOI
- 10.1002/adfm.201301783
- ISSN
- 1616-301X
- Abstract
- Small molecule pentacene layer has been a representative among many organic thin-film transistor (OTFT) channels with decent p-type mobilities, but it is certainly light-sensitive due to its relatively small highest occupied molecular orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap (1.85 eV). Although a few other small molecule-based layers have been reported later, their photo-stabilities or related device applications have hardly been addressed. Here, a new photostable organic layer is reported, heptazole (C26H16N2), which has almost the same HOMO level as that of pentacene but with a higher HOMO-LUMO gap (approximate to 2.95 eV). This heptazole OTFT displays a decent mobility comparable to that of conventional amorphous Si TFTs, showing good photostability unlike pentacene OTFTs. An image pixel driving the photostable heptazole OTFT connected to a pentacene/Al Schottky photodiode is demonstrated. This heptazole OTFT also conveniently forms a logic inverter coupled with a pentacene OTFT, sharing Au for source/drain.
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