| 학회 | 한국재료학회 |
| 학술대회 | 2019년 가을 (10/30 ~ 11/01, 삼척 쏠비치 호텔&리조트) |
| 권호 | 25권 2호 |
| 발표분야 | 특별심포지엄4. 신개념 광/전자소재의 응용 심포지엄-오거나이저:김연상(서울대) |
| 제목 | Flexible microLED for Displays and Biomedical Applications |
| 초록 | With the emergence of the internet of things (IoT) era, visual IoT platforms have attracted significant interest, which can offer sensing, collecting, and processing of optical information in hyperconnected society. Flexible displays are a potential candidate for bilateral visual communication, as they can be easily affixed anywhere, such as on the surfaces of human skin, clothes, automobiles and buildings. III-V Inorganic LEDs have superior characteristics, such as long-term stability, high efficiency, and strong brightness compared to OLED. However, due to the brittle property of inorganic materials, III-V LED limits its applications for the flexible electronics. This seminar introduces the flexible vertical GaAs/GaN microLED on plastic substrates using anisotropic conductive film (ACF), resulting high optical power density, The superb properties of the flexible inorganic LED enable the dramatic extension of flexible displays toward not only wearable devices of light source but also full color flexible micoLED displays for consumer TV. MicroLED stimulation of specific neural populations of the brain is one of the facile and reliable methods used in neuroscience for deduction of functional movement, complex behavior and even long-range connectivity. Recent advanced biomedical tools now employ flexible optoelectronic devices combined with optogenetic mouse models to activate small functional regions using blue-light driven channelrhodopsin. Here we introduce flexible vertical light-emitting diodes (VLEDs) for 2D perturbation of specific functional areas of mouse cortex, capable of stimulating motor neurons deep below layer III from the brain surface. Selective operation of pulsed red light from f-VLEDs induces mouse body movements and synchronized electromyogram (EMG) signals. These results show that the III-V based flexible LED can be used as the future flexible implantable biomedical applications such as skin research and phototherapeutic tool. |
| 저자 | Keon Jae Lee |
| 소속 | Department of Materials Science and Engineering |
| 키워드 | MicroLED; f-VLED; optoelectronics; biomedical |
