White organic light‐emitting diodes based on C545T doped emitting system
White organic light‐emitting diodes based on C545T doped emitting system
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DOI：
10.1002/pssa.201127520
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发表时间：
2012-02
期刊：
影响因子：
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通讯作者：
Hua-ping Lin;F. Zhou;Jun Li;Xiaowen Zhang;Liang Zhang;Xueyin Jiang;Zhilin Zhang;Jianhua Zhang
中科院分区：
文献类型：
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作者：
Hua-ping Lin;F. Zhou;Jun Li;Xiaowen Zhang;Liang Zhang;Xueyin Jiang;Zhilin Zhang;Jianhua Zhang
以2，3，6，7-四氢-1，1，7，7-四甲基-1H，5 H，11 H-10（2-苯并噻唑基）喹嗪-[9，9a，1gh]香豆素（C545 T）为发光体系，制备了单发光层（EML）和双发光层（EML）结构的白色荧光有机发光二极管（WOLED）。通过引入双EML结构，获得了白色发射，其具有国际照明委员会（CIE）色坐标（0.331，0.335）和8.04 cd/A的发光效率。此外，具有单EML结构的WOLED显示出上级的电致发光性能，例如更低的电压、更高的亮度和增强的功率效率。这些改进归因于其通过C545 T中介的高能量转移能力。给出了Forster半径，以阐明实际的能量传递过程。
Fluorescent white organic light‐emitting diodes (WOLEDs) with single‐emitting layer (EML) and double‐EML structures were demonstrated using a 2,3,6,7‐tetrahydro‐1,1,7,7,‐tetramethyl‐1H,5H,11H‐10(2‐benzothiazolyl)quinolizine‐[9,9a,1gh]coumarin (C545T) doped emitting system. With the incorporation of double‐EML structure, white emission with Commission Internationale de L'Eclairage (CIE) color coordinates of (0.331, 0.335) and luminous efficiency of 8.04 cd/A was obtained. Moreover, WOLED with a single‐EML structure shows superior electroluminescence performances such as lower voltage, higher luminance, and enhanced power efficiency. These improvements are attributed to its high energy transfer ability via the intermediation of C545T. The Forster's radius was given to clarify the actual energy transfer process.