Laser-induced Electronics

  The use of lasers for industrial, scientific, and medical applications has received an enormous amount of attention due to the advantageous ability of precise parameter control for heat transfer. It has realized unique photothermal and photochemical reactions with various types of materials, including metal nanomaterials, ceramics, graphene, polymers, and perovskites, enabling the substantial performance improvement of human electronics.

  For human electronics, low thermal budget issue of the soft materials (only enduring 100 Celcius for PET) hinders high performance device. Ultrafast and selective annealing feature of the laser enabled to focus high thermal energy on specific area without damaging soft substrate. Our group developed Laser Lift-off(LLO) technology to provide breakthrough of inorganic-based high performance soft electronics. By using light-reacting layer and laser irradiation through transparent sacrificial substrate, high performance flexible oxide TFT, flexible piezoelectric nanogenerator and flexible memory have been transferred from bulk substrate to plastic substrates.

  HAND set up one of the best laser facilities including excimer, UV, Green, IR DPSS lasers and Flash Lamp for human electronics. With outstanding light annealing system of HAND, our group also research light-material interaction, light-induced flexible electrodes, laser dopant activation for monolithic 3D integration and photo-pyrolysis for electromagnetic shield materials.

[Related References]

“Self-powered flexible electronics beyond thermal limits” Nano Energy, 56, 531, 2019

“Janus Graphene Liquid Crystalline Fiber with Tunable Properties Enabled by Ultrafast Flash Reduction” Small, 1901529, 2019

“Flash-induced ultrafast recrystallization of perovskite for flexible light-emitting diodes” Nano Energy, 61, 236, 2019

“Flash-welded ultraflat silver nanowire network for flexible organic light-emitting diode and triboelectric tactile sensor” APL Mater. 9, 061112 , 2021

“Metastable Quantum dot for photoelectric devices via flash-induced one-step sequential self-formation” Nano Energy, 84, 105889, 2021

“Flash-induced Robust Cu electrode on Glass substrates and its application for thin-film µLED” Adv. Mater., 33, 2007186, 2021

“Flashlight-material interaction for wearable and flexible electronics” Materials Today, 51, 525, 2021

“Light-material interfaces for self-powered optoelectronics” J. Mater. Chem., 9, 25694, 2021

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Department of Materials Science and Engineering, KAIST ㅣ Fax: 82-42-350-3310 ㅣ TEL: 82-42-350-3343 ㅣAddress : 291 DaeHak-ro, Yuseong-gu, Daejeon, Korea, 34141 (대전 유성구 대학로 291)

Copyright  © 2021. KAIST. All rights reserved.

Department of Materials Science and Engineering, KAIST

Fax: 82-42-350-3310 ㅣ TEL: 82-42-350-3343 ㅣ

Address : 291 DaeHak-ro, Yuseong-gu, Daejeon, Korea, 34141 (대전 유성구 대학로 291)

Copyright  © 2021.KAIST. All rights reserved.