title: Facile synthesis of composition-tuned ZnO/Zn x Cd1-x Se nanowires for photovoltaic applications.
abstract: ZnO/Zn x Cd1-x Se coaxial nanowires (NWs) have been successfully synthesized by combining chemical vapor deposition with a facile alternant physical deposition method. The shell composition x can be precisely tuned in the whole region (0 ≤ x ≤ 1) by adjusting growth time ratio of ZnSe to CdSe. As a result, the effective bandgaps of coaxial nanowires were conveniently modified from 1.85 eV to 2.58 eV, almost covering the entire visible spectrum. It was also found that annealing treatment was in favor of forming the mixed crystal and improving crystal quality. An optimal temperature of 350°C was obtained according to our experimental results. Additionally, time resolved photo-luminescence spectra revealed the longest carrier lifetime in ZnO/CdSe coaxial nanowires. As a result, the ZnO/CdSe nanowire cell acquired the maximal conversion efficiency of 2.01%. This work shall pave a way towards facile synthesis of ternary alloys for photovoltaic applications.
authors.affiliation: Department of Physics, Fujian Key Laboratory of Semiconductor Materials and Applications, Xiamen University, 422 Siming South Road, Xiamen, 361005 People's Republic of China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Luo
authors.affiliation: Department of Physics, Fujian Key Laboratory of Semiconductor Materials and Applications, Xiamen University, 422 Siming South Road, Xiamen, 361005 People's Republic of China.
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Wu
authors.affiliation: Department of Physics, Fujian Key Laboratory of Semiconductor Materials and Applications, Xiamen University, 422 Siming South Road, Xiamen, 361005 People's Republic of China.
authors.forename: Jialun
authors.initials: J
authors.lastname: He
authors.affiliation: Department of Physics, Fujian Key Laboratory of Semiconductor Materials and Applications, Xiamen University, 422 Siming South Road, Xiamen, 361005 People's Republic of China.
authors.forename: Yiyan
authors.initials: Y
authors.lastname: Cao
authors.affiliation: Department of Physics, Fujian Key Laboratory of Semiconductor Materials and Applications, Xiamen University, 422 Siming South Road, Xiamen, 361005 People's Republic of China.
authors.forename: Waseem Ahmed
authors.initials: WA
authors.lastname: Bhutto
authors.affiliation: Department of Physics, Fujian Key Laboratory of Semiconductor Materials and Applications, Xiamen University, 422 Siming South Road, Xiamen, 361005 People's Republic of China.
authors.forename: Weiping
authors.initials: W
authors.lastname: Wang
authors.affiliation: Department of Physics, Fujian Key Laboratory of Semiconductor Materials and Applications, Xiamen University, 422 Siming South Road, Xiamen, 361005 People's Republic of China.
authors.forename: Xuanli
authors.initials: X
authors.lastname: Zheng
authors.affiliation: Department of Physics, Fujian Key Laboratory of Semiconductor Materials and Applications, Xiamen University, 422 Siming South Road, Xiamen, 361005 People's Republic of China.
authors.forename: Shuping
authors.initials: S
authors.lastname: Li
authors.affiliation: Department of Automation, Xiamen University, 422 Siming South Road, Xiamen, 361005 People's Republic of China.
authors.forename: Shengquan
authors.initials: S
authors.lastname: Lin
authors.affiliation: Department of Physics, Fujian Key Laboratory of Semiconductor Materials and Applications, Xiamen University, 422 Siming South Road, Xiamen, 361005 People's Republic of China.
authors.forename: Lijing
authors.initials: L
authors.lastname: Kong
authors.affiliation: Department of Physics, Fujian Key Laboratory of Semiconductor Materials and Applications, Xiamen University, 422 Siming South Road, Xiamen, 361005 People's Republic of China.
authors.forename: Junyong
authors.initials: J
authors.lastname: Kang
keywords: Alternant physical deposition; Composition tuning; Solar cell; ZnO/ZnCdSe coaxial nanowires