title: Highly efficient phosphor-converted white organic light-emitting diodes with moderate microcavity and light-recycling filters.
abstract: We demonstrate the combined effects of a microcavity structure and light-recycling filters (LRFs) on the forward electrical efficiency of phosphor-converted white organic light-emitting diodes (pc-WOLEDs). The introduction of a single pair of low- and high-index layers (SiO(2)/TiO(2)) improves the blue emission from blue OLED and the insertion of blue-passing and yellow-reflecting LRFs enhances the forward yellow emission from the YAG:Ce(3+) phosphors layers. The enhancement of the luminous efficacy of the forward white emission is 1.92 times that of a conventional pc-WOLED with color coordinates of (0.34, 0.34) and a correlated color temperature of about 4800 K.
authors.affiliation: Department of Physics, KAIST, Daejeon, Korea.
authors.forename: Sang-Hwan
authors.initials: SH
authors.lastname: Cho
authors.forename: Jeong Rok
authors.initials: JR
authors.lastname: Oh
authors.forename: Hoo Keun
authors.initials: HK
authors.lastname: Park
authors.forename: Hyoung Kun
authors.initials: HK
authors.lastname: Kim
authors.forename: Yong-Hee
authors.initials: YH
authors.lastname: Lee
authors.forename: Jae-Gab
authors.initials: JG
authors.lastname: Lee
authors.forename: Young Rag
authors.initials: YR
authors.lastname: Do
mesh_terms: D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D008029:Lighting / Q000295:instrumentation*; D008904:Miniaturization; D009930:Organic Chemicals / Q000737:chemistry*; D012666:Semiconductors; D014159:Transducers
chemical_list: D009930:Organic Chemicals