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Designing metal hemispheres on silicon ultrathin film solar cells for plasmonic light trapping

Gao, T and Stevens, E and Lee, JK and Leu, PW (2014) Designing metal hemispheres on silicon ultrathin film solar cells for plasmonic light trapping. Optics Letters, 39 (16). 4647 - 4650. ISSN 0146-9592

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Abstract

We systematically investigate the design of two-dimensional silver (Ag) hemisphere arrays on crystalline silicon (c-Si) ultrathin film solar cells for plasmonic light trapping. The absorption in ultrathin films is governed by the excitation of Fabry-Perot TEMm modes.We demonstrate that metal hemispheres can enhance absorption in the films by (1) coupling light to c-Si film waveguide modes and (2) exciting localized surface plasmon resonances (LSPRs). We show that hemisphere arrays allow light to couple to fundamental TEm and TMm waveguide modes in c-Si film as well as higher-order versions of these modes. The near-field light concentration of LSPRs also may increase absorption in the c-Si film, though these resonances are associated with significant parasitic absorption in the metal. We illustrate how Ag plasmonic hemispheres may be utilized for light trapping with 22% enhancement in short-circuit current density compared with that of a bare 100 nm thick c-Si ultrathin film solar cell. © 2014 Optical Society of America.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Gao, T
Stevens, E
Lee, JKjul37@pitt.eduJUL370000-0002-7778-7679
Leu, PWpleu@pitt.eduPLEU0000-0002-1599-7144
Centers: Other Centers, Institutes, Offices, or Units > Petersen Institute of NanoScience and Engineering
Date: 1 January 2014
Date Type: Publication
Journal or Publication Title: Optics Letters
Volume: 39
Number: 16
Page Range: 4647 - 4650
DOI or Unique Handle: 10.1364/ol.39.004647
Schools and Programs: Swanson School of Engineering > Industrial Engineering
Swanson School of Engineering > Mechanical Engineering and Materials Science
Refereed: Yes
ISSN: 0146-9592
PubMed ID: 25121839
Date Deposited: 16 Oct 2014 18:47
Last Modified: 02 Feb 2019 21:55
URI: http://d-scholarship.pitt.edu/id/eprint/23268

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