title: Enhanced light out-coupling efficiency of organic light-emitting diodes with an extremely low haze by plasma treated nanoscale corrugation.
abstract: Extremely low-haze light extraction from organic light-emitting diodes (OLEDs) was achieved by utilizing nanoscale corrugation, which was simply fabricated with plasma treatment and sonication. The haze of the nanoscale corrugation for light extraction (NCLE) corresponds to 0.21% for visible wavelengths, which is comparable to that of bare glass. The OLEDs with NCLE showed enhancements of 34.19% in current efficiency and 35.75% in power efficiency. Furthermore, the OLEDs with NCLE exhibited angle-stable electroluminescence (EL) spectra for different viewing angles, with no change in the full width at half maximum (FWHM) and peak wavelength. The flexibility of the polymer used for the NCLE and plasma treatment process indicates that the NCLE can be applied to large and flexible OLED displays.
authors.affiliation: Display and Nanosystem Laboratory, College of Engineering, Korea University, Seoul 136-713, Republic of Korea. bkju@korea.ac.kr.
authors.forename: Ju Hyun
authors.initials: JH
authors.lastname: Hwang
authors.forename: Hyun Jun
authors.initials: HJ
authors.lastname: Lee
authors.forename: Yong Sub
authors.initials: YS
authors.lastname: Shim
authors.forename: Cheol Hwee
authors.initials: CH
authors.lastname: Park
authors.forename: Sun-Gyu
authors.initials: SG
authors.lastname: Jung
authors.forename: Kyu Nyun
authors.initials: KN
authors.lastname: Kim
authors.forename: Young Wook
authors.initials: YW
authors.lastname: Park
authors.forename: Byeong-Kwon
authors.initials: BK
authors.lastname: Ju