基于单晶TiO_2纳米颗粒光阳极的高效染料敏化太阳能电池  

High-efficiency dye-sensitized solar cells based on single crystal TiO_2 nanoparticle photoanodes

作　　者：兰章[1] 吴晚霞[1] 阙兰芳[1] 吴季怀[1] 

机构地区：[1]环境友好功能材料教育部工程中心,福建省高校功能材料重点实验室,华侨大学材料物理化学研究所,厦门361021

出　　处：《中国科学：化学》2016年第4期382-388,共7页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金海峡联合基金重点项目(编号:U1205112)、国家自然科学基金(编号:51002053,51472094,61474047);教育部科技重点项目(编号:212206);福建省杰出青年科学基金(编号:2015J06011);福建省高校新世纪优秀人才和杰出青年研究人才及华侨大学优秀科技创新人才(编号:ZQN-YX102)资助项目

摘　　要：以阳极氧化法制备的TiO_2纳米管阵列为原料,在含氟化铵的密闭环境中通过热处理直接将TiO_2纳米管阵列转化为单晶TiO_2纳米颗粒膜.不同热处理时间样品的扫描电子显微镜(SEM)图表明,单晶TiO_2纳米颗粒是由TiO_2纳米管坍塌后重新生长成的.X射线衍射(XRD)及高倍率透射电子显微镜(HR-TEM)图显示出TiO_2纳米颗粒为锐钛矿单晶.将这种单晶TiO_2纳米颗粒膜转移到导电玻璃上制备染料敏化太阳能电池光阳极,获得良好的光电性能.对单晶TiO_2纳米颗粒膜厚度进行优化后,染料敏化太阳能电池最高光电转换效率达到8.66%,单色光光电转换效率最高值为86.70%.该方法是一种非水热制备法,克服了水热法对产量的限制,从而为大量制备高质量单晶TiO_2纳米颗粒提供了一种简单可行的方法.Single crystal TiO_2 nanoparticles were synthesized by high temperature thermal treatment of TiO_2 nanotube arrays, which were prepared with potentiostatic anodization of Ti foils, in a closed environment. SEM images of samples with different time of thermal treatment revealed that the single crystal TiO_2 nanoparticles were regrown from TiO_2 nanotube arrays along with collapsing and disappearing of nanotube structure gradually. XRD pattern and high magnification TEM images showed that the synthesized TiO_2 nanoparticles were anatase single crystal. Photoanodes were fabricated by transferring the single crystal TiO_2 nanoparticle films from Ti foils to FTO glasses. Through optimizing thickness of the single crystal TiO_2 nanoparticle films, the highest power conversion efficiency of the DSSCs can attain to 8.66%, with the maximum monochromatic incident photon-to-electron conversion efficiency of 86.70%. Meanwhile, the presented preparation method is a kind of non-hydrothermal method, so it can overcome the output limitation of the hydrothermal method and give a facile way for large scale synthesis of high quality single crystal TiO_2 nanoparticles.

关 键 词：染料敏化太阳能电池 单晶TiO_2 光阳极 光电转换 

分 类 号：TM914.4[电气工程—电力电子与电力传动]