中文摘要：

制备并研究了基于3种小分子荧光材料的白光有机电致发光器件。发光层采用红色发光材料DCJTB掺杂绿光材料Alq3构成混合发光层,与OXD-7构成的蓝色发光层形成异质结的结构,并以NPB为空穴注入层。通过改变结构参数详细研究了发射光谱及其色坐标的电场依赖性。通过分析载流子注入/传输特性,控制激子的复合区域等措施得到了色坐标稳定性好、光谱丰富的高性能白光电致发光器件。经过优化的器件结构可以覆盖更大的可见光区域,当电压从9 V增加到13 V时,色坐标仅从CIE（x,y）=（0.364,0.314）偏移到CIE（x,y）=（0.332,0.291）,具有较好的色稳定性。

英文摘要：

White organic light-emitting diodes based on three small molecular fluorescence materials were designed and prepared. The emitting layers consisted of a red dye, 4- （dicyanomethylene） -2- tert-butyl-6-（1,1,7,7-tctra-methyljulolidin-4-yl-vinyl） -4H-pyran （ DCJTB）, doped in a green layer of 8-hydroxyquinoline aluminum salt （Alqz）, which further formed a heterojunction with a blue layer of 2,2＇- （ 1,3-phenylene ） -bis [ 5-（4-tert-butylphenyl） - 1,3,4-oxadiazole ] （ OXD-7 ）. N, N＇- bis-（naphthalene-l-yl） -N, N＇-bis（phenyl）-benzidine （NPB） was used as a hole transport layer. Voltage dependent emission spectra and their colorimetric characteristics were manipulated using different device structures. After adjusting the carrier injection/transporting properties, the exciton recombination region was confined and the color stability was improved against the driving voltages. An improved white light-emitting device has a wide spectrum in visible range and a good color stabil-ity, its color coordinates change slightly from CIE（x,y） = （0. 364,0. 314） to CIE（x,y） = （0. 332, 0. 291 ） when the driven voltage changes from 9.1 V to 12.9 V.