Evaluation of true power luminous efficiency from experimental luminance values

被引：32

作者：

Tsutsui, T ^{[1
]}

Yamamato, K ^{[1
]}

机构：

[1] Kyushu Univ, Grad Sch Engn Sci, Dept Appl Sci Elect & Mat, Kasuga, Fukuoka 8168580, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1999年 / 38卷 / 5A期

关键词：

organic light-emitting device; luminance; multilayer device; luminous efficiency; spatial emission pattern; correction factor;

D O I：

10.1143/JJAP.38.2799

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A method for obtaining true external power luminous efficiency from experimentally obtained luminance in organic light-emitting diodes (LEDs) was demonstrated. Conventional two-layer organic LEDs with different electron-transport layer thicknesses were prepared. Spatial distributions of emission intensities were observed. The large deviation in both emission spectra and spatial emission patterns were observed when the electron-transport layer thickness was varied. The deviation of emission patterns from the standard Lambertian pattern was found to cause overestimations of power luminous efficiencies as large as 30%. A method for evaluating correction factors was proposed.

引用

页码：2799 / 2803

页数：5

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