Surface passivation of nano-textured silicon solar cells by atomic layer deposited Al2O3 films

Bingfei Dou, Rui Jia, Yun Sun, Haofeng Li, Chen Chen, Zhi Jin, Xinyu Liu

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

In the work, the surface recombination of silicon nanostructures was investigated. Silicon nanostructures were synthesized using technique of silver catalyzed chemical wet etching, and the passivation layers of SiNx and Al2O3 were deposited on the samples. The thermal atomic layer deposited Al2O3 can conformally cover the rough surface and reduce the defect density of the nanostructures. Moreover, the negative fixed charge in Al2O3 layer introduces the surface field effect passivation. The lifetime measurement result indicates that Al2O3 layers offer much better passivation effect on the silicon nanostructure surface than SiNx layers. The silicon nano-textured solar cells with SiNx and Al2O3 passivation layers were manufactured and measured. The results show that the enhanced solar cell performance was achieved by Al2O3 passivation.

Original languageEnglish (US)
Article number174301
JournalJournal of Applied Physics
Volume114
Issue number17
DOIs
StatePublished - Nov 7 2013

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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