Profiling the optical distribution of a white organic light emitting diode as a lighting source

Henglong Yang; Jung-Chieh Su; Li-Chieh Chen; Yu-Chen Lien; Sheng-Yang Peng; Ya-Di Chen

doi:10.1117/12.892647

23 September 2011 Profiling the optical distribution of a white organic light emitting diode as a lighting source

Henglong Yang, Jung-Chieh Su, Li-Chieh Chen, Yu-Chen Lien, Sheng-Yang Peng, Ya-Di Chen

Proceedings Volume 8123, Eleventh International Conference on Solid State Lighting; 81230N (2011) https://doi.org/10.1117/12.892647
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

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.

Citation Download Citation

Henglong Yang, Jung-Chieh Su, Li-Chieh Chen, Yu-Chen Lien, Sheng-Yang Peng, and Ya-Di Chen "Profiling the optical distribution of a white organic light emitting diode as a lighting source", Proc. SPIE 8123, Eleventh International Conference on Solid State Lighting, 81230N (23 September 2011); https://doi.org/10.1117/12.892647

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