基于Zn(Q-Ph)_2与DCJTB非掺杂型OLED的制备及其电致发光性能研究

Preparation and Electroluminescence Property of a Non-doping OLED Based on Zn(Q-Ph)_2 and DCJTB

合成了有机发光材料2-苯基-8-羟基喹啉锌Zn（Q—Ph）2，通过^1H NMR，UV—Vis及MS等手段对配合物进行了结构表征．利用该材料与高效的红光染料DCJTB复合制备出全新结构的非掺杂型OLED器件，其结构为ITO／NPB／DCJTB／Zn（Q—Ph）2／AlQ3／Al．将DCJTB超薄层的厚度调节到0～2．0nm范围内，OLED器件的发光色调经历了黄光、红光和橙光的转变，并且探讨了DCJTB厚度对OLED发光机理以及发光复合区域的影响．当DCJTB的厚度为0．5nm时，获得了稳定的红光发射，该器件在5．5V电压下启亮，在25V外加电压下发光亮度达到420cd／m^2，对应的电流密度为250mA／cm^2。

As electroluminescent material zinc his （2-phenyl-8-hydroxyquinolato） [ Zn （Q-Ph） 2 ] was synthesized and characterized by ^1H NMR, UV-Vis and MS measurements. DCJTB [ 4-（dicyanomethylene）-24- butyl-6 （1,1,7,7-tetramethyljulolldyl-9-enyl） 4H-pyran ], a highly efficient fluorescent dye, and Zn （Q-Ph） 2 were used to fabricate a kind of novel non-doping organic light-emitting diode with a structure of ITO/NPB { N, N＇-Di [ （ 1 -naphthalenyl ） -N, N＇-diphenyl ] - （ 1, 1 ＇-biphenyl ） -4, 4＇-diamine }/DCJTB/Zn （ Q-Ph ） 2/AlQ3 （8-hydroxyquinoline aluminum）/Al. By changing the thickness of ultra-thin layer DCJTB, yellow-light, redlight and orange-light emission from OLEDs were studied. Their luminescent color, electroluminescent mechanism and recombination zone were optimized in this paper, when a 0. 5 nm ,thick DCJTB was used, a stable red emission was obtained. With a lower turn-on voltage at about 5.5 V, the non-doping OLED showed a maximum brightness of 420 cd/m^2 and current density of 250 mA/cm^2 at 25 V.