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华侨大学 信息科学与工程学院,福建 厦门,361021
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陈星明, 胡胜坤, 金玉, 等. 不同发光染料的顶发射有机电致发光器件的研制[J]. 发光学报, 2016,37(4):446-451.
CHEN Xing-ming, HU Sheng-kun, JIN Yu, et al. Top-emitting Organic Light-emitting Devices with Different Luminescent Dyes[J]. Chinese Journal of Luminescence, 2016,37(4):446-451.
陈星明, 胡胜坤, 金玉, 等. 不同发光染料的顶发射有机电致发光器件的研制[J]. 发光学报, 2016,37(4):446-451. DOI: 10.3788/fgxb20163704.0446.
CHEN Xing-ming, HU Sheng-kun, JIN Yu, et al. Top-emitting Organic Light-emitting Devices with Different Luminescent Dyes[J]. Chinese Journal of Luminescence, 2016,37(4):446-451. DOI: 10.3788/fgxb20163704.0446.
通过设计合理的微腔结构
制备了基于绿光染料C545t、黄光染料Rubrene、红光染料DCJTB的3种顶发射有机电致发光器件。研究了不同发光染料对顶发射器件的光谱的影响。研究表明
微腔结构对光谱具有窄化作用。绿光、黄光器件的发光峰波长并未随视角增大而明显变化
体现出良好的光谱角度性
而红光器件却出现了明显的光谱蓝移现象。绿光器件的最大功率效率为8.7 lm/W
当电流密度为45 mA/cm
2
时
亮度能达到7 205 cd/m
2
;黄光器件的电流效率最大值为11.5 cd/A
当电流密度为48 mA/cm
2
时
亮度可达到3 770 cd/m
2
;红光器件的电流效率最大能达到3.54 cd/A
当电流密度为50 mA/cm
2
时
可获得1 358 cd/m
2
的亮度。采用合适的发光材料以及合适的器件结构
不仅可以提高顶发射器件的色纯度及发光效率
还可以改善器件发光光谱的角度依赖性。
Three kinds of top-OLEDs with fluorescent dyes-green C545t
yellow Rubrene and red DCJTB were fabricated by reasonable design of microcavity structure
and the corresponding optical properties were also studied. The results show that the spectrum of OLEDs can be narrowed by micro-cavity effect. With the increasing of the viewing angle
the spectral peak of green C545t and yellow Rubrene devices don't change significantly and exhibit independence of the viewing angle
however
an obvious blue shift of red DCJTB device can be observed. The maximum power efficiency of green device is 8.7 lm/W
and the brightness is 7 205 cd/m
2
with the current density of 45 mA/cm
2
. The maximum current efficiency of yellow device is 11.5 cd/A
and the brightness is 3 770 cd/m
2
with the current density of 48 mA/cm
2
. The maximum current efficiency of red device is 3.54 cd/A
and the brightness is 1 358 cd/m
2
with the current density of 50 mA/cm
2
. Not only the chroma and luminous efficiency but also the angle-independence of the top-OLED can be improved by the use of appropriate luminescent material and suitable device structure.
顶发射有机电致发光器件发光染料微腔光谱
top-emitting organic light-emitting devicesluminescent dyesmicrocavityspectra
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胡胜坤,金玉,吴志军,等. 低电压有机薄膜晶体管驱动顶发射有机发光二极管的集成像素的研制 [J]. 发光学报, 2014, 35(11):1370-1375. HU S K, JIN Y, WU Z J, et al.. Top-emitting organic light-emitting device integrated pixel driven by low voltage organic thin film transistor [J]. Chin. J. Lumin., 2014, 35(11):1370-1375. (in Chinese)
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李源浩,武聪伶,杨君礼,等. 基于MoO3/Ag/MoO3透明阳极的顶发射OLED的模拟计算与制备 [J]. 发光学报, 2015, 36(4):459-465. LI Y H, WU C L, YANG J L, et al.. Simulation calculation and preparation of top emitting OLEDs with transparent anode of MoO3/Ag/MoO3[J]. Chin. J. Lumin., 2015, 36(4):459-465. (in Chinese)
XIE W F, CHEN S F, ZHANG L T, et al.. Top-emitting organic light-emitting devices with different-thickness top silver cathodes [J]. J. Phys. D: Appl. Phys., 2007, 40(19):5888-5891.
CHEN S F, XIE W F, HUANG W, et al.. Improvement of viewing angle and pixel contrast ratio in green top-emitting organic light-emitting devices [J]. Opt. Express, 2008, 16(12):8868-8875.
张春玉,王庆凯,秦莉,等. 微腔有机电致发光器件角度依赖性的模拟与实验验证 [J]. 发光学报, 2015, 36(4):454-458. ZHANG C Y, WANG Q K, QIN L, et al.. Simulation and experimental verification for the angle dependence of the microcavity organic light emitting device[J]. Chin. J. Lumin., 2015, 36(4):454-458. (in Chinese)
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HOFMANN S, THOMSCHKE M, FREITAG P, et al.. Top-emitting organic light-emitting diodes: influence of cavity design [J]. Appl. Phys. Lett., 2010, 97(25):253308-1-3.
PENG H J, SUN J X, ZHU X L, et al.. High-efficiency microcavity top-emitting organic light-emitting diodes using silver anode [J]. Appl. Phys. Lett., 2006, 88(7):073517-1-3.
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