Multiple Core鈥揝hell Silicon Nanowire-Based Heterojunction Solar Cells

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• 作者：Guobin Jia ; Bj枚rn Eisenhawer ; Jan Dellith ; Fritz Falk ; Annett Th酶gersen ; Alexander Ulyashin
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：January 17, 2013
• 年：2013
• 卷：117
• 期：2
• 页码：1091-1096
• 全文大小：327K
• 年卷期：v.117,no.2(January 17, 2013)
• ISSN：1932-7455

文摘

Silicon nanowire-based solar cells received increasing attention due to their enhanced light harvesting properties and the potential to use low-cost materials to produce solar cells comparable with those on costly monocrystalline counterparts. It is essential to improve the performance of nanowire solar cells by suppressing surface recombination. A multiple core (crystalline silicon nanowires)鈥搒hell silicon nanowire-based heterojunction solar cell has been fabricated to deal with this problem. To this end, an ultrathin passivating Al₂O₃ tunnel layer was deposited on the highly doped p-type a-Si:H emitter prior to a transparent conducting oxide by atomic layer deposition (ALD). Both open circuit voltage and current density increase significantly due to the insertion of the ultrathin Al₂O₃ layer. An efficiency of 10.0% has been reached by using this multiple core鈥搒hell structure.