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Photonic Crystal Waveguides for >90% Light Trapping Efficiency in Luminescent Solar Concentrators

Bauser, Haley C. and Bukowsky, Colton R. and Phelan, Megan and Weigand, William and Needell, David R. and Holman, Zachary C. and Atwater, Harry A. (2020) Photonic Crystal Waveguides for >90% Light Trapping Efficiency in Luminescent Solar Concentrators. ACS Photonics, 7 (8). pp. 2122-2131. ISSN 2330-4022. doi:10.1021/acsphotonics.0c00593.

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Luminescent solar concentrators are currently limited in their potential concentration factor and solar conversion efficiency by the inherent escape cone losses present in conventional planar dielectric waveguides. We demonstrate that photonic crystal slab waveguides tailored for luminescent solar concentrator applications can exhibit >90% light trapping efficiency. This is achieved by use of quantum dot luminophores embedded within the waveguide that absorb light at photon energies corresponding to photonic crystal leaky modes that couple to incoming sunlight. The luminophores then emit at lower photon energies into photonic crystal bound modes that enable highly efficient light trapping in slab waveguides of wavelength-scale thickness. Photonic crystal waveguides thus nearly eliminate escape cone losses, and overcome the performance limitations of previously proposed wavelength-selective dielectric multilayer filters. We describe designs for hole-array and rod-array photonic crystals comprised of hydrogenated amorphous silicon carbide using CdSe/CdS quantum dots. Our analysis suggests that photonic crystal waveguide luminescent solar concentrators using these materials these can achieve light trapping efficiency above 92% and a concentration factor as high as 100.

Item Type:Article
Related URLs:
URLURL TypeDescription
Bukowsky, Colton R.0000-0003-3577-8050
Phelan, Megan0000-0002-4968-7128
Needell, David R.0000-0001-8343-5883
Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2020 American Chemical Society. Received: April 13, 2020; Published: June 19, 2020. This work was supported by the DOE “Photonics at Thermodynamic Limits” Energy Frontier Research Center under Grant DE-SC0019140 (D.R.N. and M.P.) and also by the by the Caltech Space Solar Power project (H.C.B.). Work by C.R.B., W.W., and Z.C.H. were supported in part by the Engineering Research Center Program of the National Science Foundation and the Office of Energy Efficiency and Renewable Energy of the Department of Energy under NSF Cooperative Agreement No. EEC-1041895. Author Contributions: H.C.B. and C.R.B. contributed equally to this work. The manuscript was written through contributions of all authors. The authors declare no competing financial interest.
Group:Space Solar Power Project
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0019140
Space Solar Power ProjectUNSPECIFIED
Subject Keywords:photonic crystals, quantum dots, luminescent solar concentrators, waveguide coupling, photovoltaics
Issue or Number:8
Record Number:CaltechAUTHORS:20200622-104138516
Persistent URL:
Official Citation:Photonic Crystal Waveguides for >90% Light Trapping Efficiency in Luminescent Solar Concentrators. Haley C. Bauser, Colton R. Bukowsky, Megan Phelan, William Weigand, David R. Needell, Zachary C. Holman, and Harry A. Atwater. ACS Photonics 2020 7 (8), 2122-2131; DOI: 10.1021/acsphotonics.0c00593
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103960
Deposited By: George Porter
Deposited On:23 Jun 2020 19:30
Last Modified:16 Nov 2021 18:26

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