title: Hybrid GaN/organic microstructured light-emitting devices via ink-jet printing.
abstract: We report what we believe to be the first use of organic nanostructures for efficient colour conversion of gallium nitride light emitting diodes (LEDs). The particular nanomaterials, based on star-shaped truxene oligofluorenes, offer an attractive alternative to inorganic colloidal quantum dots in the search for novel and functional 'nanophosphors'. The truxenes have been formed into a composite with photoresist and ink-jet printed onto microstructured gallium nitride LEDs, resulting in a demonstrator hybrid microdisplay technology with pixel size approximately 32 microm. The output power density of the hybrid device was measured to be approximately 8.4 mW/cm(2) per pixel at driving current density of 870.8A/cm(2) and the efficiency of colour conversion at drive current of 7 mA was estimated to be approximately 50%.
authors.affiliation: Institute of Photonics, University of Strathclyde, Glasgow G4 0NW, UK.
authors.forename: M
authors.initials: M
authors.lastname: Wu
authors.forename: Z
authors.initials: Z
authors.lastname: Gong
authors.forename: A J
authors.initials: AJ
authors.lastname: Kuehne
authors.forename: A L
authors.initials: AL
authors.lastname: Kanibolotsky
authors.forename: Y J
authors.initials: YJ
authors.lastname: Chen
authors.forename: I F
authors.initials: IF
authors.lastname: Perepichka
authors.forename: A R
authors.initials: AR
authors.lastname: Mackintosh
authors.forename: E
authors.initials: E
authors.lastname: Gu
authors.forename: P J
authors.initials: PJ
authors.lastname: Skabara
authors.forename: R A
authors.initials: RA
authors.lastname: Pethrick
authors.forename: M D
authors.initials: MD
authors.lastname: Dawson