作　　者： ; ; ; ; ;

机构地区： 浙江大学高分子科学与工程学系硅材料国家重点实验室

出　　处： 《高等学校化学学报》 2003年第6期1110-1113,共4页

摘　　要： 采用溶剂球磨分散法制备了四苯基卟啉 (H2 TPP) /二苯并咪唑 (Im-PTC)复合光生材料 ,用浸涂法将其制成功能分离型双层光导体 .采用光致释电法对其光电导性能进行测试 ,发现在 5 0 0 nm下 ,由质量分数 5 % H2 TPP/4 0 % Im-PTC复合光生材料制备的光导体的光敏性比单纯 4 0 %的 Im-PTC制备的光导体提高了 3.5倍 ,说明 H2 TPP对 Im-PTC有明显的敏化作用 .进一步研究了该复合材料的电子结构 ,结果表明 ,H2 TPP与 Im -PTC存在分子间的光致电荷转移 ,从而提高了电荷的光生和分离效率 ,增强了光导体的光敏性 . The xerographic properties of dual-layer photoreceptors containing 5,10,15,20-tetraphenylporphyrin(H 2TPP) and bisbenzimidazole perylene(Im-PTC) composite were described. H 2TPP/Im-PTC composite was dispersed by ball-milling in polymers and dual-layer photoreceptors were prepared by coating. Photoreceptors containing H 2TPP/Im-PTC composites exhibited a better photosensitivity than that containing Im-PTC. When irradiatied with 500 nm monochromatic light of 12.5 μW/cm 2, photosensitivity(E -1 1/2) of 5%/40%Im-PTC composite was increased from 0.163 3 μJ -1·cm 2 to 0.571 4 μJ -1·cm 2. In addition, the initial potential of photoreceptors increased and the residual potential decreased drastically. Photovoltaic response of H 2TPP/Im-PTC composite was stronger than that of Im-PTC and showed H 2TPP/Im-PTC composite had higher charge photogeneration and separation ef ficiency. The photoinduced electron-transfer process between H 2TPP and Im-PTC contributes to the enhancement of photosensitivity of composite photogeneration materials.

关 键 词： 四苯基卟啉 光电导性能 二苯并咪唑苝 敏化 溶剂球磨分散法 制备 双层光导体 光敏性 复合光生材料 光致电荷转移

领　　域： [理学] [理学] [理学] [理学]