BLUE ELECTROLUMINESCENT DIODES UTILIZING BLENDS OF POLY(P-PHENYLPHENYLENE VINYLENE) IN POLY(9-VINYLCARBAZOLE)
BLUE ELECTROLUMINESCENT DIODES UTILIZING BLENDS OF POLY(P-PHENYLPHENYLENE VINYLENE) IN POLY(9-VINYLCARBAZOLE)
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DOI：
10.1016/0379-6779(94)90196-1
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发表时间：
1994-01-15
期刊：
影响因子：
4.4
通讯作者：
HEEGER, AJ
中科院分区：
文献类型：
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作者：
ZHANG, C;VONSEGGERN, H;HEEGER, AJ
我们报道了由聚对苯基苯乙撑(PPPV)与空穴传输聚合物聚(9-乙烯基咔唑)(PVK)组成的聚合物共混物制成的二极管的蓝光发射。可溶性的PPPV和PVK允许在室温下从溶液中旋转浇注电致发光聚合物混合物来制造发光二极管(LED)，而不需要后续处理或热处理。最初的器件利用钙作为PPPV/PVK薄膜正面的电子注入(整流)接触，旋转浇铸到部分涂有一层铟/锡氧化物(ITO)的玻璃衬底上作为空穴注入接触。LED在大约30V的电压下开启，蓝色的峰值发射波长为495 nm(室温下)。测量了共混物中PPPV含量对量子效率的影响；当PVK中PPPV的浓度仅为2%时，最大效率约为0.16%光子/电子。
We report blue light emission from diodes made from polymer blends composed of poly(p-phenylphenylene vinylene) (PPPV) in a hole-transporting polymer, poly(9-vinylcarbazole) (PVK). The soluble PPPV and PVK allow fabrication of light-emitting diodes (LEDs) by spin-casting the electroluminescent polymer blend from solution at room temperature with no subsequent processing or heat treatment required. The initial devices utilized calcium as the electron-injecting (rectifying) contact on the front surface of a PPPV/PVK film spin-cast onto a glass substrate partially coated with a layer of indium/tin oxide (ITO) as the hole-injecting contact. The LEDs turn on at approximately 30 V and have a peak emission wavelength in the blue at 495 nm (at room temperature). The quantum efficiency is measured as a function of PPPV content in the blend; the maximum efficiency is approximately 0.16% photons/electron at a concentration of only 2% PPPV in PVK.