Paper Title:
Optical and Electrical Properties of Some Organic Thin Films for Optoelectronic Applications
  Abstract

Organic semiconductor thin films of bis-(2-methyl-8-quinolinolato)-4-(phenyl-phenolato) -aluminium-(III) (BAlq), N,N′-bis(naphthalen-1-yl)-N,N′-bis(phenyl)benzidine (NPB), and tris-(8- hydroxyquinoline) aluminum (Alq) were prepared by the vacuum sublimation technique. The optical properties in the UV-visible region of the thin films were investigated by optical transmittance and absorbance spectra. The optical energy gaps were obtained from direct allowed transitions at room temperature by Tauc’s law. The Urbach energy and the slope of Urbach edge were estimated by the Urbach-edges method, respectively. Furthermore, the current-voltage characteristics of organic thin films were analyzed, and the different slopes in the lower and higher voltage regions were observed. From the experimental studies, the effective carrier mobility, free carrier density, and electrical conductivity were also evaluated respectively.

  Info
Periodical
Chapter
Chapter 3: Materials Forming/Machining/Joining
Edited by
Prasad Yarlagadda, Yun-Hae Kim, Zhijiu Ai and Xiaodong Zhang
Pages
426-429
DOI
10.4028/www.scientific.net/AMR.337.426
Citation
S.B. Chen, Z. Y. Zhong, "Optical and Electrical Properties of Some Organic Thin Films for Optoelectronic Applications", Advanced Materials Research, Vol. 337, pp. 426-429, 2011
Online since
September 2011
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Price
$32.00
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