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Proceedings Paper

Evaluation of subband energy in TPD/DCM organic multiple quantum wells
Author(s): Takayuki Takayuki; Masaya Murata; Motoki Haishi; Taro Ando; Naoki Ohtani
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Paper Abstract

In this paper, we report fabrication and evaluation of an organic light emitting diode (OLED) with organic multiple quantum wells (OMQWs). We fabricated the OMQWs using organic molecular beam deposition, consisting of TPD (N,N'-bis(3-methilphenyl)-N.N-diphenyl benzidine) and DCM (4-(Dicyanomethilane)-2-methil-6-(p-dimethilamino-styryl)- 4H-pyran). We measured photoluminescence (PL) and electroluminescence (EL) properties to characterize the OMQWs. In both measurements the peaking wavelengths clearly become shorter as the thickness of the QWs becomes narrower. This result obviously indicates that subband states are achieved in the quantum wells. In addition, we did numerical analysis to assign the effective mass of electrons in the OMQWs. Consequently, the effective mass of electrons can be estimated as 0.05 m0.

Paper Details

Date Published: 11 March 2008
PDF: 4 pages
Proc. SPIE 6984, Sixth International Conference on Thin Film Physics and Applications, 698408 (11 March 2008); doi: 10.1117/12.792183
Show Author Affiliations
Takayuki Takayuki, Doshisha Univ. (Japan)
Masaya Murata, Doshisha Univ. (Japan)
Motoki Haishi, Doshisha Univ. (Japan)
Taro Ando, Hamamatsu Photonics (Japan)
Naoki Ohtani, Doshisha Univ. (Japan)

Published in SPIE Proceedings Vol. 6984:
Sixth International Conference on Thin Film Physics and Applications
Wenzhong Shen; Junhao Chu, Editor(s)

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