Photocurrent Mapping in High-Efficiency Radial p鈥搉 Junction Silicon Nanowire Solar Cells Using Atomic Force Microscopy

详细信息    查看全文

• 作者：Jih-Shang Hwang ; Ming-Chun Kao ; Jian-Min Shiu ; Chieh-Ning Fan ; Shien-Chau Ye ; Wen-Shen Yu ; Hsiu-Mei Lin ; Tai-Yuan Lin ; Surojit Chattopadhyay ; Li-Chyong Chen ; Kuei-Hsien Chen
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：November 10, 2011
• 年：2011
• 卷：115
• 期：44
• 页码：21981-21986
• 全文大小：943K
• 年卷期：v.115,no.44(November 10, 2011)
• ISSN：1932-7455

文摘

Rapid formation of radial p鈥搉 junctions on electroless-etched silicon nanowires (SiNWs) was successfully demonstrated. With a low-cost objective, a homemade nonhazardous diffusion source of high phosphor concentration annealed at a small thermal budget was used. The SiNW solar cell, with Au electrodes, has shown a power conversion efficiency of 8.41%, which is higher by 30% compared with its planar counterpart. The SiNW solar cell incorporates an inherent antireflection property, reduced diffusion length requirement, and broad-band spectral quantum efficiency. The evidence of a successful radial p鈥搉 junction formation in the NWs has been revealed through the help of a conducting atomic force microscope (AFM) scanning for the photogenerated currents on the fractured surfaces of the NWs. The demonstrated radial junction fabrication technique is believed to reduce the cost of production and promote widespread use of them.