Bubble formation in organic light-emitting diodes Article

Liao, LS, He, J, Zhou, X et al. (2000). Bubble formation in organic light-emitting diodes . JOURNAL OF APPLIED PHYSICS, 88(5), 2386-2390. 10.1063/1.1286009

cited authors

  • Liao, LS; He, J; Zhou, X; Lu, M; Xiong, ZH; Deng, ZB; Hou, XY; Lee, ST

authors

abstract

  • Bubbles in organic light-emitting diodes can be formed from gas release due to Joule heating effect at localized electrical shorts during operation, which could be simulated by a rapid thermal annealing. The gases in the bubbles consist of not only adsorbed moistures but also the decomposed organic species, which are detected in situ in an ultrahigh vacuum chamber. In the device of Al/tris-(8-hydroxyquinoline) aluminum (Alq/N,N′-diphenyl-N,N′-bis-{3-methylphenyl}-{1,1′biphenyl}-4, 4′-diamine/indium tin oxide (ITO), the gases released from ITO surface were mainly of adsorbed moistures, while those released from the organic layers were of both the decomposed products from Alq and the trapped moistures. The decomposition of Alq could not be easily avoided if there were severe localized electrical shorts in the devices. © 2000 American Institute of Physics.

publication date

  • September 1, 2000

published in

Digital Object Identifier (DOI)

start page

  • 2386

end page

  • 2390

volume

  • 88

issue

  • 5