Methodology for optimizing viewing characteristics of top-emitting organic light-emitting devices

Chung-Chih Wu; Chun-Liang Lin; Ping-Yuan Hsieh; Huo-Hsien Chiang
May 2004
Applied Physics Letters;5/17/2004, Vol. 84 Issue 20, p3966
Academic Journal
Top-emitting organic light-emitting devices (OLEDs) have a few technical merits for active-matrix OLED displays. Generally stronger microcavity effects inherent in top-emitting OLEDs, however, complicate optimization of device efficiency and other viewing characteristics. In this letter, using the rigorous classical electromagnetic model, we analyze emission characteristics of top-emitting OLEDs as a function of device structures. From the comprehensive analysis, trends in the dependence of emission characteristics on device structures are extracted, and accordingly, a general methodology for optimizing viewing characteristics of top-emitting OLEDs for display applications is suggested. The effectiveness of the analysis and the methodology is confirmed by experimental results.


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