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Thermally Controlled, Patterned Graphene Transfer Printing for Transparent and Wearable Electronic/Optoelectronic System
Author(s) -
Choi Moon Kee,
Park Inhyuk,
Kim Dong Chan,
Joh Eehyung,
Park Ok Kyu,
Kim Jaemin,
Kim Myungbin,
Choi Changsoon,
Yang Jiwoong,
Cho Kyoung Won,
Hwang JaeHo,
Nam JwaMin,
Hyeon Taeghwan,
Kim Ji Hoon,
Kim DaeHyeong
Publication year - 2015
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201502956
Subject(s) - graphene , materials science , transfer printing , electronics , stretchable electronics , nanotechnology , flexible electronics , optoelectronics , wearable technology , flexible display , transparency (behavior) , oled , wearable computer , layer (electronics) , composite material , computer science , electrical engineering , thin film transistor , engineering , computer security , embedded system
Graphene has been highlighted as a platform material in transparent electronics and optoelectronics, including flexible and stretchable ones, due to its unique properties such as optical transparency, mechanical softness, ultrathin thickness, and high carrier mobility. Despite huge research efforts for graphene‐based electronic/optoelectronic devices, there are remaining challenges in terms of their seamless integration, such as the high‐quality contact formation, precise alignment of micrometer‐scale patterns, and control of interfacial‐adhesion/local‐resistance. Here, a thermally controlled transfer printing technique that allows multiple patterned‐graphene transfers at desired locations is presented. Using the thermal‐expansion mismatch between the viscoelastic sacrificial layer and the elastic stamp, a “heating and cooling” process precisely positions patterned graphene layers on various substrates, including graphene prepatterns, hydrophilic surfaces, and superhydrophobic surfaces, with high transfer yields. A detailed theoretical analysis of underlying physics/mechanics of this approach is also described. The proposed transfer printing successfully integrates graphene‐based stretchable sensors, actuators, light‐emitting diodes, and other electronics in one platform, paving the way toward transparent and wearable multifunctional electronic systems.