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以苯乙烯衍生物 (amino substituteddistyrylarylenederivative,BCzVB)掺杂的 4 ,4′ 双 (9 咔唑基 ) 1,1′ 联苯(4 ,4′ N ,N′ dicarbazole biphyenyl,CBP)为发光层 ,制备了结构为ITO (indiumtinoxide) /TPD (N ,N′ diphenyl N ,N′ bis(3 methylphenyl) 1,1′biphenyl 4 ,4′diamine) /CBP :BCzVB/Alq3 [tris (8 hydroxy quinolinato)aluminum ) /Liq(8 hydroxy quinolinato) lithium]/Al的电致发光器件。这里TPD、Alq3 分别为空穴传输层和电子传输层 ,CBP :BCzVB为发光层 ,Liq为电子注入层。器件最高亮度为 85 0 0cd/m2 ,效率为 3.5cd/A (量子效率为 2 .6 % ) ,器件色坐标 [CommissionInternationaledel′Eclairage (CIE)co ordinates]为x =0 .15 ,y =0 .16 ,与纯BCzVB作发光层的器件相比 ,器件的发光色纯度和效率得到大幅提高。光致发光与电致发光对比分析表明器件的发光主要来自能量传递和陷阱俘获机制 ,但陷阱俘获机制起了主导作用。
The 4,4’-bis (9carbazolyl) 1,1’-biphenyl (4, 4’N, N’-dicarbazole biphyenyl) doped with amino substituted distylarylarylenederivative (BCzVB) The structure is ITO (indiumtinoxide) / TPD (N, N ’diphenyl N, N’bis (3 methylphenyl) 1,1’biphenyl 4, 4’diamine) / CBP: BCzVB / Alq3 [tris (8 hydroxy quinolinato) / Liq (8-hydroxy quinolinato) lithium] / Al electroluminescent device. Here, TPD and Alq3 are a hole transporting layer and an electron transporting layer respectively, CBP: BCzVB is a light emitting layer, and Liq is an electron injection layer. The device has a maximum brightness of 85 0 cd / m2 and an efficiency of 3.5 cd / A (quantum efficiency 2.6%). The device Commission Coordinate et al. (CIE) co ordinates has x = 0.15 and y = 0. 16, compared with pure BCzVB as the light emitting layer device, the luminescent color purity and efficiency of the device is greatly improved. Comparative analysis of photoluminescence and electroluminescence shows that the luminescence of the device mainly comes from the energy transfer and trap trapping mechanism, but the trap trapping mechanism plays a leading role.