期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 9, 页码 5199-5205出版社
AMER CHEMICAL SOC
DOI: 10.1021/am507983y
关键词
quantum dots; photovoltaic; nanowire arrays; heterostructure; light harvesting
资金
- National Natural Science Foundation of China [91222201, 51472274]
- NSF of Guangdong Province [S2013030013474]
- Program of Guangzhou Science and Technology [2014J4100016]
The development of a novel nanoarray photoanode with a heterostructure on a transparent conducting oxide substrate provides a promising scheme to fabricate efficient energy conversion devices. Herein, we successfully synthesize the vertically aligned hierarchical TiO2 nanowire/ZnO nanorod or TiO2 nanowire/ZnO nanosheet hybrid arrays, which are proven to be excellent anode candidates for superior light utilization. Consequently, the quantum-dot-sensitized solar cells based on such hybrid arrays exhibit an impressive power conversion efficiency (PCE) under AM 1.5G one sun illumination with improved short-circuit current density (JSC) and fill factor compared to pristine TiO2 nanowire arrays. Combined with the chemical-bath-deposited Cu2S counter electrode, the eventual PCE can be further optimized to as high as 4.57% for CdS/CdSe co-sensitized quantum dot solar cells.
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