ZHANG Chun-yu, LU Jing-bin, GUO Shu-xu, GAO Feng-li, WANG Hong-jie, CAO Jun-sheng. Performance of Resonant Cavity Mirrors of Microcavity Organic Light-emitting Device[J]. 发光学报, 2010,31(4): 493-497
ZHANG Chun-yu, LU Jing-bin, GUO Shu-xu, GAO Feng-li, WANG Hong-jie, CAO Jun-sheng. Performance of Resonant Cavity Mirrors of Microcavity Organic Light-emitting Device[J]. 发光学报, 2010,31(4): 493-497DOI:
Performance of Resonant Cavity Mirrors of Microcavity Organic Light-emitting Device
According to the related calculation formula of microcavity device
we use transfer matrix method to simulate and compare with two mirrors which form the resonant cavity of microcavity organic light-emitting device (MOLED). We observed that
as metal mirror's reflectivity increases
electroluminescence (EL) and full wavelength of half maximum (FWHM) of microcavity device become narrow
peak position moves to the designed resonant peak of 520 nm
peak intensity and EL integral intensity increases gradually. The result shows that the bigger the metal mirror's reflectivity is
the better the result is.As the periodicity of DBR mirror increases in 1~9
peaks of EL are all 520 nm
FWHM narrows gradually
integral intensity decreases gradually
peak intensity increases at first then it decreases
and at 4 periodicities it is the biggest. So
when we design MOLED
the periodicity of DBR is an important parameter. It isn't good for light emitting if the reflectivity of DBR is bigger and the effect of microcavity is smaller if the reflectivity is smaller. We must make a resonable choice according to the purpose and need.
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references
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