TiO_2纳米棒-ZnO纳米片分级结构的制备及光电性能  

Preparation and photoelectrical property of the TiO_2-ZnO nanorod-nanosheet hierarchical structure

作　　者：孙宝[1] 张赛 苏子亭 郝彦忠[1] 杜静文 裴娟[1] 李英品[1] SUN Bao;ZHANG Sai;SU Ziting;HAO Yanzhong;DU Jingwen;PEI Juan;LI Yingpin(College of Sciences,Hebei University of Science and Technology,Shijiazhuang 050018,China;School of Chemical and Pharmaceutical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China)

机构地区：[1]河北科技大学理学院,石家庄050018 [2]河北科技大学化学与制药工程学院,石家庄050018

出　　处：《功能材料》2018年第9期9020-9026,共7页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21173065;21603053);河北省自然科学基金资助项目(B2014208062;B2014208066);河北科技大学博士启动基金资助项目(QD201050;010087)

摘　　要：采用两步水热法在无种子层的基础上制备了新颖的TiO_2纳米棒-ZnO纳米片分级结构。采用旋涂辅助连续离子反应方法分别在TiO_2纳米棒阵列和TiO_2纳米棒-ZnO纳米片分级结构中沉积窄禁带半导体光敏剂CdS纳米晶,形成CdS/TiO_2纳米棒复合膜和CdS/TiO_2-ZnO分级纳米结构复合膜。利用SEM、TEM、XRD、紫外-可见吸收光谱、瞬态光电流图谱等分析手段对样品的形貌结构以及电极的光吸收和光电性能进行了表征和测试。结果表明,沉积光敏层CdS后,TiO2纳米棒-ZnO纳米片分级纳米结构膜的瞬态光电流明显高于TiO_2纳米棒阵列膜,尤其是在500nm处光电响应出现明显增强;以P3HT为p型聚合物材料组装杂化太阳电池,光伏性能测试结果表明,以P3HT/CdS/TiO_2-ZnO分级结构复合膜制备的杂化太阳电池能量转换效率可达0.65%,与P3HT/CdS/TiO2复合膜制备的杂化太阳电池的能量转换效率相比提高了58%。A new hierarchical structure of TiO 2-ZnO nanorod-nanosheet was prepared by two-step hydrothermal method without any seed layers.A spin-coating assisted successive ionic layer reaction method(SC-SILR)was used to deposit the CdS nanocrystals into the TiO 2 nanorod array and the TiO 2-ZnO hierarchical nanostructure to form the CdS/TiO 2 and CdS/TiO 2-ZnO nanocomposite films.Different analysis methods,such as SEM,TEM,XRD,UV-Vis and transient photocurrent,were utilized to characterize the morphologies,structures of the samples and investigate the light absorption properties,the photoelectric conversion performance of the electrodes.The results indicated that the transient photocurrent of the TiO 2-ZnO hierarchical nanostructure film was apparently superior to the TiO 2 nanorod array film after depositing the photosensitive layer of CdS and showed an evident enhancement at wavelength of 500 nm.Hybrid solar cells were assembled using P3HT as p-type polymer materials.Photovoltaic measurement results indicated that the energy conversion efficiency of the hybrid solar cell based on the hierarchical structure of P3HT/CdS/TiO 2-ZnO composite film could reach 0.65%,which revealed an increasing of 58%compared with that of the hybrid solar cell based on the P3HT/CdS/TiO 2 composite film.

关 键 词：水热法 TiO2纳米棒-ZnO纳米片分级结构 旋涂辅助连续离子反应法 CDS纳米晶 光电性能 

分 类 号：O64[理学—物理化学]