Journal
SYNTHETIC METALS
Volume 160, Issue 7-8, Pages 756-761Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2010.01.016
Keywords
Electroluminescence; SOLED; Monte-Carlo simulation; Gaussian DOS
Funding
- Department of Science and Technology (DST)
- Council of Scientific and Industrial Research (CSIR), New Delhi, India
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Electroluminescent zinc complex [(2-(2-hydroxyphenyl)benzoxazole)(2-methyl-8-hydoxyquinoline)] zinc [Zn(hpb)mq] has been synthesized. It has been used with a blue emitting zinc complex Zn(hpb)(2), to fabricate stacked organic light emitting diode (OLED). Thickness of layers of these materials has been optimized to achieve white light emission. The maximum luminescence of the device was 8390 Cd/m(2) at 14V. Commission Internationale de l'Eclairage coordinates of the device, with 40 nm thickness of Zn(hpb)(2) and 15 nm thickness of Zn(hpb)mq, were (0.29, 0.38) at 7 V and were well within the white region. A model has been presented for simulating the electroluminescence (EL) spectrum of stacked OLED based on Gaussian disorder model using Monte-Carlo technique. From the model the energetic disorders, highest ocuppied molecular orbital and lowest unoccupied molecular orbital positions of different emissive layers and the excimer layer have been estimated. (C) 2010 Elsevier B.V. All rights reserved.
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