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Large‐Area CVD‐Grown MoS 2 Driver Circuit Array for Flexible Organic Light‐Emitting Diode Display
Author(s) -
Woo Youngjun,
Hong Woonggi,
Yang Sang Yoon,
Kim Ho Jin,
Cha JunHwe,
Lee Jae Eun,
Lee Khang June,
Kang Taegyu,
Choi SungYool
Publication year - 2018
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201800251
Subject(s) - amoled , materials science , optoelectronics , chemical vapor deposition , thin film transistor , oled , active matrix , diode , bend radius , flexible display , thin film , threshold voltage , substrate (aquarium) , molybdenum disulfide , transistor , nanotechnology , voltage , layer (electronics) , bending , electrical engineering , composite material , oceanography , engineering , geology
2D‐layered transition metal dichalcogenides (TMDCs) such as molybdenum disulfide (MoS 2 ) are promising materials for next‐generation active matrix organic light‐emitting diode (AMOLED) display technology owing to their high mobility and large bandgap size. However, practical applications of TMDCs in driving circuits for flexible displays remain challenging because of the lack of high‐quality large‐area thin films and suitable fabrication processes. Here, millimeter‐scale large‐area bilayer or trilayer MoS 2 thin films are synthesized through chemical vapor deposition (CVD) and an AMOLED driver circuit array consisting of bottom‐gate staggered CVD‐grown MoS 2 thin‐film transistors is fabricated on a flexible polyimide substrate. The flexible driver circuit exhibits a stable switching and driving operation under tensile strain induced by a bending radius of 3.5 mm, showing field‐effect mobilities of up to ≈9 cm 2 V −1 s −1 , large ON‐state current density (up to ≈5 µA µm −1 ), and high ON/OFF‐state drain current ratio (maximum value of over 10 8 ) with an operating gate voltage below 10 V. The results demonstrate that MoS 2 backplanes are among the promising candidates for next‐generation deformable and transparent AMOLED displays.