钙钛矿(结构)
带隙
材料科学
能量转换效率
光电子学
纳米棒
光伏系统
太阳能电池
氧化物
脉冲激光沉积
载流子
钙钛矿太阳能电池
纳米技术
化学工程
薄膜
冶金
工程类
生物
生态学
作者
Limin Yu,Junhong Jia,Gewen Yi
标识
DOI:10.1002/pssa.201600540
摘要
An electrode with [KNbO3]0.9[BaCo1/2Nb1/2O3–δ]0.1 (KBCNO) perovskite oxide as sensitizer and well-aligned TiO2 nanorod arrays is prepared via conventional standard solid-state synthesis method, followed by pulsed laser deposition technique for the first time. Enhanced absorption in visible light region is observed for KBCNO@TiO2 NRs photoelectrode, which is mainly because the inserted Co 3d electronic states can hybridize with O 2p states in the gap of KBCNO, reducing the band gap to 1.90 eV. Additionally, the oxygen vacancies existing in KBCNO can not only serve as photoinduced charge traps and adsorption sites but also prevent recombination of photoinduced electron–hole, giving rise to enhanced separation of photogenerated electron–hole pair and leading to an improved performance in solar energy conversion. The KBCNO@TiO2 NRs photoelectrode exhibits an energy conversion efficiency of 0.183% under one sun illumination. This work provide further insight for improving the efficiency of utilization of solar energy by using a new composite perovskite oxides material, which may be promising rational categories of material for solar conversion and storage devices.
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