【摘要】 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(30nm)/NPBX:25%CzHQZn(xnm)/BCP(10nm)/Alq3(60-x)nm/LiF(0.5nm)/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15,20,25,30nm进行变化,相应改变Alq3的厚度,使得这两者的总厚度为60nm保持不变。当掺杂发光层的厚度是20nm,Alq3的厚度是40nm,其他层厚度保持不变时,器件在4V电压下实现了黄光发射,色坐标为(0.514 6,0.470 5),亮度是1.078cd/m2。在14V的电压下,器件最大发光亮度为449 0cd/m2,最大发光效率为0.98cd/A。更多还原

【Abstract】 The performance of yellow organic light-emitting devices(OLEDs) based on a novel material [(E)-2-(2-(9-ethyl-9H-carbazol-3-yl)vinyl) quinolato-zinc(CzHQZn)] with an emitting/hole-transporting layer as an acceptor was investigated.These devices were fabricated as follows: ITO/2T-NATA(30 nm)/NPBX∶25% CzHQZn(x nm)/BCP(10 nm)/Alq3(60-x) nm/LiF(0.5 nm)/Al(x: the thickness of doping layer).The x is 15,20,25,30 nm,respectively,the thickness of Alq3 is correspondingly changed,the total thickness of doping layer and Alq3 is a constant of 60 nm.When x is 20 nm,the thickness of Alq3 is 40 nm,a yellow OLED can be obtained with the CIE coordinates of(0.514 6,0.470 5),the luminance of 1.078 cd/m2 at 4 V.The maximum luminance is 449 0 cd/m2 at 14 V,and the maximum luminous efficiency is 0.98 cd/A.更多还原