title: An Ambipolar BODIPY Derivative for a White Exciplex OLED and Cholesteric Liquid Crystal Laser toward Multifunctional Devices.
abstract: A new interface engineering method is demonstrated for the preparation of an efficient white organic light-emitting diode (WOLED) by embedding an ultrathin layer of the novel ambipolar red emissive compound 4,4-difluoro-2,6-di(4-hexylthiopen-2-yl)-1,3,5,7,8-pentamethyl-4-bora-3a,4a-diaza-s-indacene (bThBODIPY) in the exciplex formation region. The compound shows a hole and electron mobility of 3.3 × 10-4and 2 × 10-4cm2V-1s-1, respectively, at electric fields higher than 5.3 × 105V cm-1. The resulting WOLED exhibited a maximum luminance of 6579 cd m-2with CIE 1931 color coordinates (0.39; 0.35). The bThBODIPY dye is also demonstrated to be an effective laser dye for a cholesteric liquid crystal (ChLC) laser. New construction of the ChLC laser, by which a flat capillary with an optically isotropic dye solution is sandwiched between two dye-free ChLC cells, provides photonic lasing at a wavelength well matched with that of a dye-doped planar ChLC cell.
authors.affiliation: Department of Molecular Physics, Lodz University of Technology , Zeromskiego 116, 90-924 Lodz, Poland.|Lviv Polytechnic National University, S. Bandera 12, 79013 Lviv, Ukraine.
authors.forename: Marian
authors.initials: M
authors.lastname: Chapran
authors.affiliation: WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , Glasgow G1 1XL, U.K.
authors.forename: Enrico
authors.initials: E
authors.lastname: Angioni
authors.affiliation: WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , Glasgow G1 1XL, U.K.
authors.forename: Neil J
authors.initials: NJ
authors.lastname: Findlay
authors.affiliation: WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , Glasgow G1 1XL, U.K.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Breig
authors.affiliation: Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University , Kent, Ohio 44242, United States.
authors.forename: Vladyslav
authors.initials: V
authors.lastname: Cherpak
authors.affiliation: Lviv Polytechnic National University, S. Bandera 12, 79013 Lviv, Ukraine.
authors.forename: Pavlo
authors.initials: P
authors.lastname: Stakhira
authors.affiliation: WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , Glasgow G1 1XL, U.K.
authors.forename: Tell
authors.initials: T
authors.lastname: Tuttle
authors.affiliation: Department of Polymer Chemistry and Technology, Kaunas University of Technology , Radvilenu Plentas 19, LT-50254 Kaunas, Lithuania.
authors.forename: Dmytro
authors.initials: D
authors.lastname: Volyniuk
authors.affiliation: Department of Polymer Chemistry and Technology, Kaunas University of Technology , Radvilenu Plentas 19, LT-50254 Kaunas, Lithuania.
authors.forename: Juozas V
authors.initials: JV
authors.lastname: Grazulevicius
authors.affiliation: Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University , Kent, Ohio 44242, United States.
authors.forename: Yuriy A
authors.initials: YA
authors.lastname: Nastishin
authors.affiliation: Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University , Kent, Ohio 44242, United States.
authors.forename: Oleg D
authors.initials: OD
authors.lastname: Lavrentovich
authors.affiliation: WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , Glasgow G1 1XL, U.K.
authors.forename: Peter J
authors.identifier: http://orcid.org/0000-0001-7319-0464
authors.initials: PJ
authors.lastname: Skabara
keywords: BODIPY dye; cholesteric liquid crystal (ChLC) laser; exciplex; organic light-emitting diodes (OLEDs); white light