发光学报, 2012, 33 (2): 176, 网络出版: 2012-02-20
高效率荧光粉转换型白光有机发光二极管的制备和性能研究
High Efficient Phosphor-converted White Organic Light-emitting Diodes with Red Sr2Si5N8∶Eu2+ Color Conversion Layer
荧光粉转换型白光有机发光二级管 红色荧光粉 色转换层 phosphor-converted white organic light-emitting di red emitting phosphor color conversion layers.
摘要
制备了一种荧光粉转换型白光有机发光二级管(pc-WOLEDs)，器件由发蓝光的荧光装置和发红光的无机荧光粉Sr2Si5N8∶Eu2+颜色转化层(CCL)复合组成，前者通过真空镀膜得到，后者采用旋涂法制备。CCL发射的红光和未被吸收的蓝光复合产生白光，最大发光效率为22.1 cd/A，最大能量效率为11.26 lm/W，外量子效率为10.2%。该pc-WOLEDs的色坐标为(0.32, 0.34)，非常接近标准白光(0.33, 0.33)。稳定性实验结果显示，该器件在不同电流密度下表现出了良好的稳定性。
Abstract
Phosphor-converted white organic light emitting diodes (pc-WOLEDs) are fabricated by combining blue OLED with red Sr2Si5N8∶Eu2+ phosphor spin coated color conversion layer (CCL). The pc-WOLED shows maximum luminous efficiency of 22.1 cd/A, maximum power efficiency of 11.26 lm/W, external quantum efficiency of 10.2% and CIE coordinates of (0.32, 0.34). Moreover, the output spectral and CIE coordinates of the pc-WOLED have a small shift in different driving current density, which demonstrate good color stability.
周智, 王峰超, 刘素琴, 刘又年, 李臻, 横山明聪. 高效率荧光粉转换型白光有机发光二极管的制备和性能研究[J]. 发光学报, 2012, 33(2): 176. ZHOU Zhi, WANG Feng-chao, LIU Su-qin, LIU You-nian, LI Zhen, YOKOYAMA Meiso. High Efficient Phosphor-converted White Organic Light-emitting Diodes with Red Sr2Si5N8∶Eu2+ Color Conversion Layer[J]. Chinese Journal of Luminescence, 2012, 33(2): 176.
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