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Proceedings Paper

Profiling the optical distribution of a white organic light emitting diode as a lighting source
Author(s): Henglong Yang; Jung-Chieh Su; Li-Chieh Chen; Yu-Chen Lien; Sheng-Yang Peng; Ya-Di Chen
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Paper Abstract

The optical distribution of a white organic light-emitting diode (WOLED) with 10x10mm2 emitting area was experimentally investigated and profiled by using a microscopic goniometer associated with energy analyzer in which the optical power on focusing spot in emitting area can be independently analyzed. Its optical distribution profile can be established by the interrelation between the relative intensity and position around emitting area. WOLED has become a potential planar lighting source due to its unique device structure consisted of multiple organic layers sandwiched by cathode and anode electrodes on glass substrate. The optical distribution of a WOLED planar lighting source is ideally expected to be uniform distribution around emitting area. Our experimental result measured from two independent WOLED samples reveals a unique distribution in which the relative intensity in central area is higher than that near the edge around emitting area. Its optical profile is similar to Gaussian distribution rather than uniform distribution as observed by naked eyes. It is also indicated that the optical profile of a WOLED planar lighting source is analogous to a point lighting source in microscopic point of view.

Paper Details

Date Published: 24 September 2011
PDF: 8 pages
Proc. SPIE 8123, Eleventh International Conference on Solid State Lighting, 81230N (24 September 2011); doi: 10.1117/12.892647
Show Author Affiliations
Henglong Yang, National Taipei Univ. of Technology (Taiwan)
Jung-Chieh Su, National Taiwan Univ. of Science and Technology (Taiwan)
Li-Chieh Chen, National Taipei Univ. of Technology (Taiwan)
Yu-Chen Lien, National Taipei Univ. of Technology (Taiwan)
Sheng-Yang Peng, National Taiwan Univ. of Science and Technology (Taiwan)
Ya-Di Chen, National Taipei Univ. of Technology (Taiwan)


Published in SPIE Proceedings Vol. 8123:
Eleventh International Conference on Solid State Lighting
Matthew H. Kane; Christian Wetzel; Jian-Jang Huang, Editor(s)

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