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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S2 — Mar. 10, 2014
  • pp: A328–A334

Electrochemically synthesized broadband antireflective and hydrophobic GaOOH nanopillars for III-V InGaP/GaAs/Ge triple-junction solar cell applications

Jung Woo Leem, Hee Kwan Lee, Dong-Hwan Jun, Jonggon Heo, Won-Kyu Park, Jin-Hong Park, and Jae Su Yu  »View Author Affiliations


Optics Express, Vol. 22, Issue S2, pp. A328-A334 (2014)
http://dx.doi.org/10.1364/OE.22.00A328


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Abstract

We report the efficiency enhancement of III-V InGaP/GaAs/ Ge triple-junction (TJ) solar cells using a novel structure, i.e., vertically-oriented gallium oxide hydroxide (GaOOH) nanopillars (NPs), as an antireflection coating. The optical reflectance properties of rhombus-shaped GaOOH NPs, which were synthesized by a simple, low-cost, and large-scalable electrochemical deposition method, were investigated, together with a theoretical analysis using the rigorous coupled-wave analysis method. For the GaOOH NPs, the solar weighted reflectance of ~8.5% was obtained over a wide wavelength range of 300-1800 nm and their surfaces exhibited a high water contact angle of ~130° (i.e., hydrophobicity). To simply demonstrate the feasibility of device applications, the GaOOH NPs were incorporated into a test-grown InGaP/GaAs/Ge TJ solar cell structure. For the InGaP/GaAs/Ge TJ solar cell with broadband antireflective GaOOH NPs, the conversion efficiency (η) of ~16.47% was obtained, indicating an increased efficiency by 3.47% compared to the bare solar cell (i.e., η~13%).

© 2014 Optical Society of America

OCIS Codes
(040.5350) Detectors : Photovoltaic
(310.1210) Thin films : Antireflection coatings
(220.4241) Optical design and fabrication : Nanostructure fabrication

ToC Category:
Photovoltaics

History
Original Manuscript: August 14, 2013
Revised Manuscript: November 14, 2013
Manuscript Accepted: February 3, 2014
Published: February 13, 2014

Citation
Jung Woo Leem, Hee Kwan Lee, Dong-Hwan Jun, Jonggon Heo, Won-Kyu Park, Jin-Hong Park, and Jae Su Yu, "Electrochemically synthesized broadband antireflective and hydrophobic GaOOH nanopillars for III-V InGaP/GaAs/Ge triple-junction solar cell applications," Opt. Express 22, A328-A334 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-S2-A328


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