Son Dong Ick, You Chan Ho, Kim Won Tae, Kim Tae Whan
Department of Information Display Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea.
Nanotechnology. 2009 Sep 9;20(36):365206. doi: 10.1088/0957-4484/20/36/365206. Epub 2009 Aug 18.
White light-emitting diodes (WLEDs) with a hybrid poly N-vinylcarbazole (PVK) and poly(methyl methacrylate) (PMMA) polymer and ZnO quantum dots (QDs) were fabricated by a spin-coating technique. Transmission electron microscopy images showed that the ZnO QDs were predominantly distributed at the circumference of the surface of the PVK polymer. Electroluminescence spectra for hybrid polymer-QD WLEDs showed a broad peak around 600 nm. The Commission Internationale de I'Eclairage chromaticity coordinates of the WLEDs fabricated utilizing hybrid polymer-QD WLEDs at 10 V were (0.39, 0.41), indicative of a white emission. The luminescence mechanisms of the WLEDs are described.
采用旋涂技术制备了具有混合聚N-乙烯基咔唑（PVK）和聚甲基丙烯酸甲酯（PMMA）聚合物以及ZnO量子点（QDs）的白色发光二极管（WLED）。透射电子显微镜图像显示，ZnO量子点主要分布在PVK聚合物表面的圆周处。混合聚合物-量子点WLED的电致发光光谱在600nm左右呈现出一个宽峰。在10V电压下利用混合聚合物-量子点WLED制备的WLED的国际照明委员会色度坐标为（0.39,0.41），表明发出白色光。描述了WLED的发光机制。
