利用一种既具有空穴传输特性又具有发光特性的新型荧光染料N-乙基咔唑-2-乙烯基-8-羟基喹啉锌[(E)-2-(2-(9-ethyl-9H-carbazol-3-yl)vinyl)quinolato-zinc,CzHQZn]掺杂在NPBX中作为空穴传输层,CzHQZn同时还作为发光的主体,制备了结构为ITO/2T-NATA(30 nm)/NPBX:25%CzHQZn(x nm)/BCP(10 nm)/Alq3(60-x)nm/LiF(0.5 nm)/Al的有机发光器件(x为掺杂发光层的厚度),掺杂发光层的厚度按照15,20,25,30 nm进行变化,相应改变Alq3的厚度,使得这两者的总厚度为60 nm保持不变.当掺杂发光层的厚度是20 nm,Alq3的厚度是40 nm,其他层厚度保持不变时,器件在4 V电压下实现了黄光发射,色坐标为(0.514 6,0.470 5),亮度是1.078 cd/m2.在14 V的电压下,器件最大发光亮度为449 0 cd/m2,最大发光效率为0.98 cd/A.
参考文献
| [1] | Tang C W,VanSlyke S A.Organic electroluminescent diodes[J].Appl.Phys.Lett.,1987,51:913-915. |
| [2] | Burroughes J H,Bradley D D C,Brown A R,et al.Light-emitting diodes based on conjugated polymers EJ].Nature,1990,347:539-541. |
| [3] | Xu Y H,Peng J B,Jiang X Y,et al.Efficient white-light-emitting diodes based on polymer codoped with two phosphorescent dyes[J].Appl.Phys.Lett.,2005,87(19):502-505. |
| [4] | 张春玉,陆景彬,秦莉,等.微腔有机电致发光白光器件设计及制作[J].发光学报,2009,30(6):728-733. |
| [5] | Sato Y,Ogata T,Ichinosawa S,et al.Characteristics of organic electroluminescent devices with new dopants[J].Synthetic Metals,1997,91(1-2):103-107. |
| [6] | Huang J S,Yang K X,Liu S Y,et al.High-brightness organic double-quantum-well electroluminescent device[J].Appl.Phys.Lett.,2000,77:1750-1752. |
| [7] | Baldo M A,Thompson M E,Forrest S R High-efficiency fluorescent organic light-emitting devices using a phosphorescent sensitizer[J].Nature,2000,403:750-752. |
| [8] | 周瑞,宋新潮,田杰,等.新型蓝色有机电致磷光配合物二(2-二氟苯基-4-甲基吡啶)[2-(2'-吡啶基)咪唑]合铱的合成及光谱学性能[J].发光学报,2010,31(2):279-284. |
| [9] | 徐阳,王华,宋春丽,等.一种近白光发射聚合物的合成与发光性能[J].发光学报,2010,31(2):274-279. |
| [10] | Yang X H,Neher D.Polymer electrophosphorescence devices with high power conversion efficiencies[J].Appl.Phys.Lett.,2004,84:2476-2478. |
| [11] | 丁桂英,姜文龙,汪津,等.利用C-545T超薄层多层结构的白光器件[J].液晶与显示,2008,23(2):214-218. |
| [12] | Ma C,Wang H,Hao Y Y,et al.A novel yellow organic light-emitting device[J].Spectro Scopy and Spectral Analysis,2008,28(7):1479-1482. |
| [13] | Jiang W L,Zhang G,Ding G Y,et al.Yellow OLEDs with CzHQZn as hole-transporting and emitting layers[J].Semiconductor Optoelectronics,2009,30(4):502-505. |
| [14] | 王广德,丁桂英,姜文龙,等.基于TPAHQZn发光色度稳定的黄色OLED[J].液晶与显示,2009,24(4):497-501. |
| [15] | 丁桂英,汪津,王广德,等.基于ruhrene掺杂剂的高亮度白色有机电致发光器件[J].液晶与显示,2008,23(1):5210-5216. |
| [16] | Ding G Y,Jiang W L,Chang X,et al.Properties of yellow-green organic light-emitting devices based on(E)-2-(2-(9-ethyl-9H-carbazol-3-yl)vinyl)quinolato-zinc[J].Acta.Phys.Chim.Sin.,2009,25(5):958-962. |
| [17] | Jiang W L,Ding G Y,Zhang G,et al.Efficiency of an organic light-emitting devices based on CzHQZn as emitter[J].光电子·激光,2009,20(8):1025-1028. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%