Examining Effects of Resonant Wavelengths on Performances of Microcavity Organic Light-Emitting Devices
Date Issued
2006
Date
2006
Author(s)
Chang, Han-Chieh
DOI
en-US
Abstract
This thesis is devoted to developing device structures and processing of microcavity organic light-emitting devices, and investigated the electro-optical characteristics of such devices.
We have analyzed the emission characteristics of microcavity OLEDs as a function of the microcavity resonant wavelengths with placing emitters around the antinode of the two mirrors using the rigorous classical electromagnetic model. From the comprehensive analyses, we find out the emission characteristics are strongly dependent on the microcavity resonant wavelengths. If the resonant wavelength is set larger than the peak wavelength of the intrinsic emission (PL) spectrum of the emitter, EL spectra of the microcavity OLED will exhibit a large blue shift with the variation of viewing angles and the device will give the higher external quantum efficiency. If the resonant wavelength is set near the peak wavelength of the intrinsic spectrum of the emitter, the device will give the highest forward luminescence efficiency. Finally, if the resonant wavelength is set smaller than the peak wavelength of the intrinsic spectrum of the emitter, EL spectra of the microcavity OLEDs will exhibit very small color shift, even hardly to detect with the variation of viewing angles.
We have also made a series of devices to corroborate the results of optical modeling. Experimental results confirm our calculated results and confirm the effectiveness of the optical modeling.
Subjects
共振波長
微共振腔型有機發光元件
Resonant Wavelengths
Microcavity Organic Light-Emitting Devices
Type
thesis
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