Title

Lithography-Free Fabrication of Crystalline Silicon Nanowires Using Amorphous Silicon Substrate for Wide-Angle Energy Absorption Applications

Author's Department

Nanotechnology Program

Second Author's Department

Physics Department

Third Author's Department

Nanotechnology Program

Find in your Library

https://pubs.acs.org/doi/10.1021/acsanm.8b00598

All Authors

Sara Magdi; Joumana El-Rifai; Mohamed A. Swillam

Document Type

Research Article

Publication Title

ACS Applied Nano Materials

Publication Date

12-31-2018

doi

https://doi.org/10.1021/acsanm.8b00598

Abstract

We report a one-step fabrication technique of silicon nanowires using KrF excimer laser. Nanowires (NWs) are fabricated by redistributing the silicon mass within the sample without etching any of the deposited amorphous silicon (a-Si). Melting and resolidification of a-Si after multiple pulses laser irradiation induced the formation of NWs with lengths more than triple the thickness of the deposited film achieving a longer light path length. This resulted in a broadband absorption enhancement with reflection less than 5% for angle of incidences up to 60°. The effect of changing each laser parameter such as energy density, exposure time, and frequency on the morphology and optical properties of the NWs are systemically analyzed and compared.

First Page

2990

Last Page

2996

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