Analysis of the external and internal quantum efficiency of multi-emitter, white organic light emitting diodes

被引：20
作者：
Furno, Mauro [1 ]
Rosenow, Thomas C. [1 ]
Gather, Malte C. [1 ]
Luessem, Bjoern [1 ]
Leo, Karl [1 ]
机构：
[1] Tech Univ Dresden, Inst Angew Photophys, D-01069 Dresden, Germany
来源：
APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 14期
关键词：
EMISSION;
D O I：
10.1063/1.4757610
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on a theoretical framework for the efficiency analysis of complex, multi-emitter organic light emitting diodes (OLEDs). The calculation approach makes use of electromagnetic modeling to quantify the overall OLED photon outcoupling efficiency and a phenomenological description for electrical and excitonic processes. From the comparison of optical modeling results and measurements of the total external quantum efficiency, we obtain reliable estimates of internal quantum yield. As application of the model, we analyze high-efficiency stacked white OLEDs and comment on the various efficiency loss channels present in the devices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4757610]
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页数：4
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