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Durham University

Department of Engineering

Staff Profile

Publication details for Professor Michael Petty

Giner-Casares, JJ, Martin-Romero, MT, Camacho, L, Martinez, BC, Cadd, D, Pearson, C & Petty, MC (2010). Stable white light emission from an externally modified organic light-emitting device. Displays 31(4-5): 181-185.

Author(s) from Durham


A blue organic light-emitting device, based on an iridium
phosphorescent dopant in a polyvinylcarbazole host, has been modified
by the addition of an external CaS:Eu inorganic phosphor layer. By
incorporating a surfactant in the phosphor mixture, a uniform coating
could be achieved by drop-casting. The resulting hybrid device
exhibited white light emission, with Commission Internationale de
l'Eclairage, CIE (x, y) coordinates of x = 0.32, y = 0.35. No
significant change in these coordinates was observed for current
densities in the range 25-510 A m(-2). The maximum power efficiencies
of the white device was 2.3 lm W-1 at a brightness of 254 cd m(-2). (C)
2010 Elsevier B.V. All rights reserved.