Cathode diffusion and degradation mechanism of polymeric light emitting devices

Min Chul Suh; Ho Kyoon Chung; Sang Yeol Kim; Jang Hyuk Kwon; Byung Doo Chin

doi:10.1016/j.cplett.2005.07.082

Cathode diffusion and degradation mechanism of polymeric light emitting devices

Min Chul Suh, Ho Kyoon Chung, Sang Yeol Kim, Jang Hyuk Kwon, Byung Doo Chin

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13 Citations (Scopus)

Abstract

Rutherford backscattering spectroscopy was applied to investigate the diffusion of metals into polymeric light emitting layer by a continuous device operation. The change of substrate (indium/tin) signal as well as calcium penetration after device operation was conspicuous using pristine light emitting polymer, whereas annealed device above polymer's glass transition temperature indicated almost no migration of calcium. This can be a direct evidence of the molecular conformation and rigidity change of light emitting polymer, which affects the degradation behavior by the metal diffusion into organic thin film.

Original language	English
Pages (from-to)	205-209
Number of pages	5
Journal	Chemical Physics Letters
Volume	413
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2005.07.082
Publication status	Published - 15 Sept 2005

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10.1016/j.cplett.2005.07.082

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AU - Chung, Ho Kyoon

AU - Kim, Sang Yeol

AU - Kwon, Jang Hyuk

AU - Chin, Byung Doo

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AB - Rutherford backscattering spectroscopy was applied to investigate the diffusion of metals into polymeric light emitting layer by a continuous device operation. The change of substrate (indium/tin) signal as well as calcium penetration after device operation was conspicuous using pristine light emitting polymer, whereas annealed device above polymer's glass transition temperature indicated almost no migration of calcium. This can be a direct evidence of the molecular conformation and rigidity change of light emitting polymer, which affects the degradation behavior by the metal diffusion into organic thin film.

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Cathode diffusion and degradation mechanism of polymeric light emitting devices

Abstract

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