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用于光伏应用的成分可调 ZnO/Zn x Cd1-x Se 纳米线的简便合成

Facile synthesis of composition-tuned ZnO/Zn x Cd1-x Se nanowires for photovoltaic applications.

作者信息

Luo Qiang, Wu Zhiming, He Jialun, Cao Yiyan, Bhutto Waseem Ahmed, Wang Weiping, Zheng Xuanli, Li Shuping, Lin Shengquan, Kong Lijing, Kang Junyong

机构信息

Department of Physics, Fujian Key Laboratory of Semiconductor Materials and Applications, Xiamen University, 422 Siming South Road, Xiamen, 361005 People's Republic of China.

Department of Automation, Xiamen University, 422 Siming South Road, Xiamen, 361005 People's Republic of China.

出版信息

Nanoscale Res Lett. 2015 Apr 15;10:181. doi: 10.1186/s11671-015-0886-3. eCollection 2015.

DOI:10.1186/s11671-015-0886-3
PMID:25977654
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4411331/
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.

摘要

通过将化学气相沉积与一种简便的交替物理沉积方法相结合，成功合成了ZnO/Zn x Cd1-x Se同轴纳米线（NWs）。通过调整ZnSe与CdSe的生长时间比，可以在整个区域（0≤x≤1）精确调节壳层成分x。结果，同轴纳米线的有效带隙从1.85电子伏特方便地调节到2.58电子伏特，几乎覆盖了整个可见光谱。还发现退火处理有利于形成混合晶体并提高晶体质量。根据我们的实验结果，获得了350°C的最佳温度。此外，时间分辨光致发光光谱显示ZnO/CdSe同轴纳米线中载流子寿命最长。结果，ZnO/CdSe纳米线电池获得了2.01%的最大转换效率。这项工作将为光伏应用中三元合金的简便合成铺平道路。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51bc/4411331/a2003257666f/11671_2015_886_Fig7_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51bc/4411331/5c5cf8bd440e/11671_2015_886_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51bc/4411331/a2003257666f/11671_2015_886_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51bc/4411331/2f16e837064b/11671_2015_886_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51bc/4411331/943fa865dbfa/11671_2015_886_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51bc/4411331/212cf1e89097/11671_2015_886_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51bc/4411331/06fd0742779b/11671_2015_886_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51bc/4411331/7ddd6047c1bb/11671_2015_886_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51bc/4411331/5c5cf8bd440e/11671_2015_886_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51bc/4411331/a2003257666f/11671_2015_886_Fig7_HTML.jpg

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