1 Supporting Information Biologically Inspired Organic Light-Emitting Diodes Jae-Jun Kim †,┴ , Jaeho Lee ‡ , Sung-Pyo Yang † , Ha Gon Kim § , Hee-Seok Kweon ǁ , Seunghyup Yoo ‡ , and Ki-Hun Jeong* ,† † Department of Bio and Brain Engineering and KAIST Institute for Optical Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea ‡ Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea § Muju Agricultural Technology Center, 416 Hanpungnu-ro, Muju-gun, Jeonbuk 568-802, Republic of Korea ǁ Division of Electron Microscopic Research, Korea Basic Science Institute, 113 Gwahangno, Yuseong-gu, Daejeon 305-806, Republic of Korea ┴ Current Address: Department of Electrical and Computer Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States * E-mail: kjeong@kaist.ac.kr