Semiconductor hierarchically structured flower-like clusters for dye-sensitized solar cells with nearly 100% charge collection efficiency.
Semiconductor hierarchically structured flower-like clusters for dye-sensitized solar cells with nearly 100% charge collection efficiency.
复制标题
DOI：
10.1039/c3nr04370c
复制
发表时间：
2013-10
期刊：
影响因子：
6.7
通讯作者：
Xukai Xin;Hsiang-Yu Liu;M. Ye;Zhiqun Lin
中科院分区：
文献类型：
--
作者：
Xukai Xin;Hsiang-Yu Liu;M. Ye;Zhiqun Lin
通过将生产ZnO纳米花的容易性与TiO 2有利的化学稳定性结合起来，通过化学浴沉积（CBD）ZnO纳米花，然后在TiO 2的存在下将其转化为TiO 2花状簇，产生了分层结构的中空TiO 2花状簇。2前体。研究了前驱体浓度、前驱体用量、反应时间对ZnO纳米花形成的影响。利用这些具有层次结构的ZnO和TiO 2花簇制备的染料敏化太阳能电池在100 mW cm（-2）光照下的功率转换效率分别为1.16%和2.73%。强度调制光电流/光电压谱（IMPS/IMVS）研究表明，花状结构具有快速的电子渡越时间，其电荷收集效率接近100%。
By combining the ease of producing ZnO nanoflowers with the advantageous chemical stability of TiO2, hierarchically structured hollow TiO2 flower-like clusters were yielded via chemical bath deposition (CBD) of ZnO nanoflowers, followed by their conversion into TiO2 flower-like clusters in the presence of TiO2 precursors. The effects of ZnO precursor concentration, precursor amount, and reaction time on the formation of ZnO nanoflowers were systematically explored. Dye-sensitized solar cells fabricated by utilizing these hierarchically structured ZnO and TiO2 flower clusters exhibited a power conversion efficiency of 1.16% and 2.73%, respectively, under 100 mW cm(-2) illumination. The intensity modulated photocurrent/photovoltage spectroscopy (IMPS/IMVS) studies suggested that flower-like structures had a fast electron transit time and their charge collection efficiency was nearly 100%.