Substrate placement angle-dependent growth of dandelion-like TiO2 nanorods for solid-state semiconductor-sensitized solar cells
Substrate placement angle-dependent growth of dandelion-like TiO2 nanorods for solid-state semiconductor-sensitized solar cells
复制标题
用于固态半导体敏化太阳能电池的蒲公英状二氧化钛纳米棒的基底放置角度依赖生长
DOI：
10.1039/c4ra10611c
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发表时间：
2014-01-01
期刊：
影响因子：
3.9
通讯作者：
Star, Alexander
中科院分区：
文献类型：
--
作者：
Peng, Guiming;Xu, Xueqing;Star, Alexander
直接生长在透明导电氧化物上的分级纳米结构有望克服目前基于纳米颗粒随机网络的半导体敏化太阳能电池的局限性。在这里，我们开发了一个简单的基板放置角度依赖的水热过程中生长蒲公英状的二氧化钛纳米结构直接在透明导电氧化物。发现在合成过程中在溶液中生长的TiO2纳米晶体促进了蒲公英状结构。通过使用这些二氧化钛纳米结构作为光阳极，Sb2S3作为敏化剂，和P3HT作为空穴传输材料，我们展示了全固态的半导体敏化太阳能电池的制造，产生的太阳能转换效率高达4.71%。电化学阻抗谱表明，适度棒融合在基地有利于减少电子重组的设备。这项工作提供了一种创新的方法，用于生长可用于能量收集和存储的分支，一维TiO 2纳米结构。
Hierarchical nanostructures grown directly on transparent conducting oxides hold the promise of overcoming the limitations of current semiconductor-sensitized solar cells based on random networks of nanoparticles. Here, we develop a facile substrate placement angle-dependent hydrothermal process to grow dandelion-like TiO2 nanostructures directly on transparent conductive oxides. TiO2 nanocrystals grown in solution during the synthesis process are found to promote the dandelion-like structure. By using these TiO2 nanostructures as photoanodes, Sb2S3 as the sensitizer, and P3HT as the hole-transporting material, we demonstrate fabrication of all-solid-state semiconductor-sensitized solar cells, which yield solar power conversion efficiency up to 4.71%. Electrochemical impedance spectroscopy indicates that moderate rod fusion at the base beneficially reduces electron recombination in the device. This work provides an innovative method for growing branched, one-dimensional TiO2 nanostructures that can be used for energy harvesting and storage.