title: Three-dimensional TiO2/ZnO hybrid array as a heterostructured anode for efficient quantum-dot-sensitized solar cells.
abstract: 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.
authors: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , Guangzhou 510275, P. R. China.
authors: Hao-Lin
authors: HL
authors: Feng
authors: Wu-Qiang
authors: WQ
authors: Wu
authors: Hua-Shang
authors: HS
authors: Rao
authors: Quan
authors: Q
authors: Wan
authors: Long-Bin
authors: LB
authors: Li
authors: Dai-Bin
authors: DB
authors: Kuang
authors: Cheng-Yong
authors: CY
authors: Su
keywords: heterostructure; light harvesting; nanowire arrays; photovoltaic; quantum dots