title: Weak-microcavity organic light-emitting diodes with improved light out-coupling.
abstract: We propose and demonstrate weak-microcavity organic light-emitting diode (OLED) displays with improved light-extraction and viewing-angle characteristics. A single pair of low- and high-index layers is inserted between indium tin oxide (ITO) and a glass substrate. The electroluminescent (EL) efficiencies of discrete red, green, and blue weak-microcavity OLEDs are enhanced by 56%, 107%, and 26%, respectively, with improved color purity. Moreover, full-color passive-matrix bottom-emitting OLED displays are fabricated by employing low-index layers of two thicknesses. As a display, the EL efficiency of white color was 27% higher than that of a conventional OLED display.
authors: Department of Physics, KAIST, Daejeon 305-701, Korea. cho0825@kaist.ac.kr
authors: Sang-Hwan
authors: SH
authors: Cho
authors: Young-Woo
authors: YW
authors: Song
authors: Joon-gu
authors: JG
authors: Lee
authors: Yoon-Chang
authors: YC
authors: Kim
authors: Jong Hyuk
authors: JH
authors: Lee
authors: Jaeheung
authors: J
authors: Ha
authors: Jong-Suk
authors: JS
authors: Oh
authors: So Young
authors: SY
authors: Lee
authors: Sun Young
authors: SY
authors: Lee
authors: Kyu Hwan
authors: KH
authors: Hwang
authors: Dong-Sik
authors: DS
authors: Zang
authors: Yong-Hee
authors: YH
authors: Lee
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D008029:Lighting / Q000295:instrumentation*; D009930:Organic Chemicals / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D012666:Semiconductors; D017971:Tin Compounds / Q000737:chemistry*
chemical_list: D009930:Organic Chemicals; D017971:Tin Compounds; C109984:indium tin oxide