Photo-stable organic thin-film transistor utilizing a new indolocarbazole derivative for image pixel and logic applications

Ji Hoon Park, Hee Sung Lee, Soohyung Park, Sung Wook Min, Yeonjin Yi, Cheon Gyu Cho, Jiwon Han, Tae Woong Kim, Seongil Im

Research output: Contribution to journalArticle

27 Citations (Scopus)

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 (C 26H16N2), which has almost the same HOMO level as that of pentacene but with a higher HOMO-LUMO gap (≈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. A new indolocabazole derivative (heptazole) possessing a HOMO-LUMO gap of ≈2.95 eV is synthesized and shows good photo-stability unlike old pentacene. An image pixel driving our photostable heptazole OTFT connected to a pentacene/Al Schottky photodiode is demonstrated. The heptazole OTFT also conveniently forms a logic inverter coupled with a pentacene OTFT, sharing Au for source/drain.

Original languageEnglish
Pages (from-to)1109-1116
Number of pages8
JournalAdvanced Functional Materials
Volume24
Issue number8
DOIs
Publication statusPublished - 2014 Feb 26

Fingerprint

Thin film transistors
logic
Molecular orbitals
transistors
Pixels
pixels
Derivatives
molecular orbitals
thin films
Photodiodes
photodiodes
Molecules
pentacene
molecules

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Park, Ji Hoon ; Lee, Hee Sung ; Park, Soohyung ; Min, Sung Wook ; Yi, Yeonjin ; Cho, Cheon Gyu ; Han, Jiwon ; Kim, Tae Woong ; Im, Seongil. / Photo-stable organic thin-film transistor utilizing a new indolocarbazole derivative for image pixel and logic applications. In: Advanced Functional Materials. 2014 ; Vol. 24, No. 8. pp. 1109-1116.
@article{cdd23af21c2f4b84a2b4ca5cae8172f5,
title = "Photo-stable organic thin-film transistor utilizing a new indolocarbazole derivative for image pixel and logic applications",
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 (C 26H16N2), which has almost the same HOMO level as that of pentacene but with a higher HOMO-LUMO gap (≈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. A new indolocabazole derivative (heptazole) possessing a HOMO-LUMO gap of ≈2.95 eV is synthesized and shows good photo-stability unlike old pentacene. An image pixel driving our photostable heptazole OTFT connected to a pentacene/Al Schottky photodiode is demonstrated. The heptazole OTFT also conveniently forms a logic inverter coupled with a pentacene OTFT, sharing Au for source/drain.",
author = "Park, {Ji Hoon} and Lee, {Hee Sung} and Soohyung Park and Min, {Sung Wook} and Yeonjin Yi and Cho, {Cheon Gyu} and Jiwon Han and Kim, {Tae Woong} and Seongil Im",
year = "2014",
month = "2",
day = "26",
doi = "10.1002/adfm.201301783",
language = "English",
volume = "24",
pages = "1109--1116",
journal = "Advanced Functional Materials",
issn = "1616-301X",
publisher = "Wiley-VCH Verlag",
number = "8",

}

Photo-stable organic thin-film transistor utilizing a new indolocarbazole derivative for image pixel and logic applications. / Park, Ji Hoon; Lee, Hee Sung; Park, Soohyung; Min, Sung Wook; Yi, Yeonjin; Cho, Cheon Gyu; Han, Jiwon; Kim, Tae Woong; Im, Seongil.

In: Advanced Functional Materials, Vol. 24, No. 8, 26.02.2014, p. 1109-1116.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Photo-stable organic thin-film transistor utilizing a new indolocarbazole derivative for image pixel and logic applications

AU - Park, Ji Hoon

AU - Lee, Hee Sung

AU - Park, Soohyung

AU - Min, Sung Wook

AU - Yi, Yeonjin

AU - Cho, Cheon Gyu

AU - Han, Jiwon

AU - Kim, Tae Woong

AU - Im, Seongil

PY - 2014/2/26

Y1 - 2014/2/26

N2 - 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 (C 26H16N2), which has almost the same HOMO level as that of pentacene but with a higher HOMO-LUMO gap (≈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. A new indolocabazole derivative (heptazole) possessing a HOMO-LUMO gap of ≈2.95 eV is synthesized and shows good photo-stability unlike old pentacene. An image pixel driving our photostable heptazole OTFT connected to a pentacene/Al Schottky photodiode is demonstrated. The heptazole OTFT also conveniently forms a logic inverter coupled with a pentacene OTFT, sharing Au for source/drain.

AB - 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 (C 26H16N2), which has almost the same HOMO level as that of pentacene but with a higher HOMO-LUMO gap (≈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. A new indolocabazole derivative (heptazole) possessing a HOMO-LUMO gap of ≈2.95 eV is synthesized and shows good photo-stability unlike old pentacene. An image pixel driving our photostable heptazole OTFT connected to a pentacene/Al Schottky photodiode is demonstrated. The heptazole OTFT also conveniently forms a logic inverter coupled with a pentacene OTFT, sharing Au for source/drain.

UR - http://www.scopus.com/inward/record.url?scp=84894491860&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84894491860&partnerID=8YFLogxK

U2 - 10.1002/adfm.201301783

DO - 10.1002/adfm.201301783

M3 - Article

AN - SCOPUS:84894491860

VL - 24

SP - 1109

EP - 1116

JO - Advanced Functional Materials

JF - Advanced Functional Materials

SN - 1616-301X

IS - 8

ER -