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A Nanoindentation study of the Reduced Elastic Modulus of Alq3 and NPB Thin-film used in OLED Devices

Lookup NU author(s): Professor Steve BullORCiD


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Two of the commonly-used Organic Light Emitting Diode (OLED) materials tris-(8-hydroxyquinoline) aluminum (Alq3) and N,N′-bis(naphthalen-1-yl)-N,N′-bis(phenyl)benzidine (NPB) are thermally evaporated as thin-films on two kinds of substrates with different hardness. By using nano-indentation techniques, the reduced elastic modulus of each of the coatings is measured. The data are carefully analysed through the standard Oliver and Pharr method, and the recently developed critical indentation depth method which takes the effect of the substrate more into account.

Publication metadata

Author(s): Chiang CJ, Bull S, Winscom C, Monkman A

Publication type: Article

Publication status: Published

Journal: Organic Electronics

Year: 2010

Volume: 11

Issue: 3

Pages: 450-455

ISSN (print): 1566-1199

Publisher: Elsevier BV


DOI: 10.1016/j.orgel.2009.11.026


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