Highly absorbing and high lifetime tapered silicon microwire arrays as an alternative for thin film crystalline silicon solar cells

Sisir Yalamanchili, Hal S. Emmer, Nathan S Lewis, Harry A. Atwater

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We report cryogenic inductively coupled plasma reactive ion etching (ICPRIE) etched tapered silicon microwires are ideal light trapping structures with extremely low (1.08% between 400 nm-1100 nm under normal incidence) reflectivity. We show that these tapered microwire arrays absorb 90.12% of incident light under normal incidence in an effectively 20 μm thick silicon when embedded in a polymer and peeled off the substrate, making them an attractive alternative for achieving high efficiency in thin film crystalline silicon solar cells. We show that microwave photoconductivity decay measurements as a simple quick way to measure carrier lifetimes in etched microwires under various liquid surface passivation techniques to estimate surface recombination velocities. The etched structures demonstrate >1 μs lifetimes.

Original languageEnglish
Title of host publication2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2999-3003
Number of pages5
Volume2016-November
ISBN (Electronic)9781509027248
DOIs
Publication statusPublished - Nov 18 2016
Event43rd IEEE Photovoltaic Specialists Conference, PVSC 2016 - Portland, United States
Duration: Jun 5 2016Jun 10 2016

Other

Other43rd IEEE Photovoltaic Specialists Conference, PVSC 2016
CountryUnited States
CityPortland
Period6/5/166/10/16

Fingerprint

Silicon solar cells
Crystalline materials
Thin films
Silicon
Carrier lifetime
Plasma etching
Reactive ion etching
Photoconductivity
Inductively coupled plasma
Passivation
Cryogenics
Microwaves
Liquids
Polymers
Substrates

Keywords

  • absortion
  • carrier lifetime
  • microwires
  • reflection
  • silicon
  • surface passivation

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

Cite this

Yalamanchili, S., Emmer, H. S., Lewis, N. S., & Atwater, H. A. (2016). Highly absorbing and high lifetime tapered silicon microwire arrays as an alternative for thin film crystalline silicon solar cells. In 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016 (Vol. 2016-November, pp. 2999-3003). [7750213] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2016.7750213

Highly absorbing and high lifetime tapered silicon microwire arrays as an alternative for thin film crystalline silicon solar cells. / Yalamanchili, Sisir; Emmer, Hal S.; Lewis, Nathan S; Atwater, Harry A.

2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Vol. 2016-November Institute of Electrical and Electronics Engineers Inc., 2016. p. 2999-3003 7750213.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Yalamanchili, S, Emmer, HS, Lewis, NS & Atwater, HA 2016, Highly absorbing and high lifetime tapered silicon microwire arrays as an alternative for thin film crystalline silicon solar cells. in 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. vol. 2016-November, 7750213, Institute of Electrical and Electronics Engineers Inc., pp. 2999-3003, 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016, Portland, United States, 6/5/16. https://doi.org/10.1109/PVSC.2016.7750213
Yalamanchili S, Emmer HS, Lewis NS, Atwater HA. Highly absorbing and high lifetime tapered silicon microwire arrays as an alternative for thin film crystalline silicon solar cells. In 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Vol. 2016-November. Institute of Electrical and Electronics Engineers Inc. 2016. p. 2999-3003. 7750213 https://doi.org/10.1109/PVSC.2016.7750213
Yalamanchili, Sisir ; Emmer, Hal S. ; Lewis, Nathan S ; Atwater, Harry A. / Highly absorbing and high lifetime tapered silicon microwire arrays as an alternative for thin film crystalline silicon solar cells. 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Vol. 2016-November Institute of Electrical and Electronics Engineers Inc., 2016. pp. 2999-3003
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