利用BCP空穴阻挡层改善白光OLED色度的研究  

Study on Chromaticity Improvement of White OLED with BCP Hole-blocking Layer

作　　者：吴晓明[1] 华玉林[2] 王肇圻[1] 印寿根[2] 邓家春[2] 刘嵩[2] 朱飞剑[2] 吴空物[2] 牛霞[2] 

机构地区：[1]南开大学现代光学研究所,天津300071 [2]天津理工大学材料物理研究所,天津300191

出　　处：《光电子．激光》2006年第10期1177-1180,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60276027;60576038);天津市自然科学重点基金资助项目(033800311);天津市自然科学面上基金资助项目(033601211);国家自然科学基金;英国皇家学会中英合作资助项目;天津市"材料物理与化学"重点学科;天津市光电显示材料与器件重点实验室资助项目

摘　　要：分别将具有空穴传输特性的蓝光材料-βNPB和具有电子传输特性的蓝绿光材料Zn(BTZ)2作为2层发光层,将荧光染料rubrene掺入-βNPB中,在发光层间引入5 nm具有空穴阻挡作用的BCP层,制备了一种ITO/PVK:-βNPB:rubrene/BCP/Zn(BTZ)2/Mg:Ag/Ag结构白色有机电致发光器件(OLED)。该器件在5 V电压下起亮;18 V电压下亮度和色坐标分别为1 600 cd/m2和(0.31,0.33),最大外量子效率为0.21%。其色度比不含或含较厚BCP层(>5 nm)的器件均有了很大的改善,并从能带结构和空穴阻挡层厚度2方面探讨了色度改善的原因。We reported a type of pure white organic light emitting device（OLED） with a double-layered structure which consists of a blue emitting layer β-NPB with hole-transport characteristics that is doped with an orange-red dye rubrene and a greenish-blue emitting layer Zn（BTZ）2 with electron-transport characteristics. Between these two emitting layers, a BOP hole-block layer （5 nm） was introduced to improve the chromaticity of the white OLED whose configurations was ITO/PVK ： β-NPB ： rubrene/BOP/Zn （BTZ）2/Mg： Ag/Ag. With a lower turn-on voltage of about 5 V,the white OLED showed a maximum quantum efficiency of 0.21% ,a brightness of 1 600 cd/m^2 and the CIE coordinates of （0.31,0.33） at 18 V. Compared with the device without BOP and the device with the BOP thickness more than 5 nm,the chromaticity of the device with the optimum BOP thickness was greatly improved, Meanwhile, we also discussed the reason of the results mentioned above about the device＇s energy level and the thickness of the hole-block layer.

关 键 词：有机电致发光 空穴阻挡层 白光 

分 类 号：TN383.1[电子电信—物理电子学]