TiO2 Sub-microsphere Film as Scaffold Layer for Efficient Perovskite Solar Cells
TiO2 Sub-microsphere Film as Scaffold Layer for Efficient Perovskite Solar Cells
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TiO2 亚微球薄膜作为高效钙钛矿太阳能电池的支架层
DOI：
10.1021/acsami.5b08421
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发表时间：
2016-03-30
影响因子：
9.5
通讯作者：
Dai, Songyuan
中科院分区：
文献类型：
--
作者：
Huang, Yang;Zhu, Jun;Dai, Songyuan
采用溶胶-凝胶法合成了平均粒径为250 nm的TiO 2亚微球，并将其作为高效介观钙钛矿太阳能电池的支架层。与由18 nm纳米颗粒组成的介孔TiO 2薄膜相比，亚微球薄膜显示出上级的光捕获特性，显著提高了太阳能电池的光捕获能力。此外，电荷传输性能也显着改善，根据瞬态光电流衰减，尽管没有显着差异的钙钛矿层的表面形貌。结果表明，纳米TiO 2亚微球薄膜太阳能电池的平均功率转换效率为15%，比纳米TiO 2薄膜太阳能电池的平均功率转换效率高12%，且分布均匀。光捕获能力和快速电荷转移的组合使得TiO 2亚微球膜成为高效钙钛矿太阳能电池的支架层的良好候选者。
TiO2 sub-microspheres composed of anatase granular-like nanocrystallines with an average diameter 250 nm are synthesized using sol gel method and employed as the scaffold layer for efficient mesocopic perovskite solar cells. Compared with mesoporous TiO2 films composed of 18 nm nanoparticles, the sub-microsphere films show superior light trapping characteristics and significantly improve the light-harvesting capability of the solar cells. In addition, the charge-transport performance is also dramatically improved according to the transient photocurrent decay despite there being no significant difference in the perovskite layer surface morphology. As a result, an average power conversion efficiency of 15% with a highly uniform distribution is achieved for the solar cells with TiO2 sub-microsphere films, 12% higher than those with TiO2 nanoparticle films. The combination of light-harvesting capability and fast charge transfer make the TiO2 sub-microsphere film a good candidate as the scaffold layer for efficient perovskite solar cells.