Broadband solar distributed Bragg reflector design using numerical optimization

Hansol Kim; Mine Kaya; Shima Hajimirza

doi:10.1016/j.solener.2021.04.045

Broadband solar distributed Bragg reflector design using numerical optimization

Hansol Kim
, Mine Kaya
, Shima Hajimirza

Department of Mechanical Engineering

Texas A&M University

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

In this paper, we optimize the structure of the multi-paired SiO₂/TiO₂ Bragg reflector to obtain broad-band and broad-angled high solar reflectivity in visible to near-infrared frequencies. To control the refractive index contrast in the BR pairs, the porosity of SiO₂ (same across all layers) is also allowed to change. We study the trade-off between the number of pairs and porosity and the overall performance of the structure. As a result of the optimization, we demonstrate that a 15-pair structure can yield an average reflectivity twice that of a quarter-wavelength stack rule design for extraterrestrial irradiance.

Original language	English
Pages (from-to)	384-392
Number of pages	9
Journal	Solar Energy
Volume	221
DOIs	https://doi.org/10.1016/j.solener.2021.04.045
State	Published - Jun 2021

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Broad-band Distributed Bragg Reflector
Material design
Numerical optimization
Optical properties
Solar energy

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10.1016/j.solener.2021.04.045

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@article{9bbf097bce5d4a14b1dddebbde7a598b,

title = "Broadband solar distributed Bragg reflector design using numerical optimization",

abstract = "In this paper, we optimize the structure of the multi-paired SiO2/TiO2 Bragg reflector to obtain broad-band and broad-angled high solar reflectivity in visible to near-infrared frequencies. To control the refractive index contrast in the BR pairs, the porosity of SiO2 (same across all layers) is also allowed to change. We study the trade-off between the number of pairs and porosity and the overall performance of the structure. As a result of the optimization, we demonstrate that a 15-pair structure can yield an average reflectivity twice that of a quarter-wavelength stack rule design for extraterrestrial irradiance.",

keywords = "Broad-band Distributed Bragg Reflector, Material design, Numerical optimization, Optical properties, Solar energy",

author = "Hansol Kim and Mine Kaya and Shima Hajimirza",

note = "Publisher Copyright: {\textcopyright} 2021 International Solar Energy Society",

year = "2021",

month = jun,

doi = "10.1016/j.solener.2021.04.045",

language = "English",

volume = "221",

pages = "384--392",

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TY - JOUR

T1 - Broadband solar distributed Bragg reflector design using numerical optimization

AU - Kim, Hansol

AU - Kaya, Mine

AU - Hajimirza, Shima

PY - 2021/6

Y1 - 2021/6

N2 - In this paper, we optimize the structure of the multi-paired SiO2/TiO2 Bragg reflector to obtain broad-band and broad-angled high solar reflectivity in visible to near-infrared frequencies. To control the refractive index contrast in the BR pairs, the porosity of SiO2 (same across all layers) is also allowed to change. We study the trade-off between the number of pairs and porosity and the overall performance of the structure. As a result of the optimization, we demonstrate that a 15-pair structure can yield an average reflectivity twice that of a quarter-wavelength stack rule design for extraterrestrial irradiance.

AB - In this paper, we optimize the structure of the multi-paired SiO2/TiO2 Bragg reflector to obtain broad-band and broad-angled high solar reflectivity in visible to near-infrared frequencies. To control the refractive index contrast in the BR pairs, the porosity of SiO2 (same across all layers) is also allowed to change. We study the trade-off between the number of pairs and porosity and the overall performance of the structure. As a result of the optimization, we demonstrate that a 15-pair structure can yield an average reflectivity twice that of a quarter-wavelength stack rule design for extraterrestrial irradiance.

KW - Broad-band Distributed Bragg Reflector

KW - Material design

KW - Numerical optimization

KW - Optical properties

KW - Solar energy

UR - https://www.scopus.com/pages/publications/85107817515

UR - https://www.scopus.com/pages/publications/85107817515#tab=citedBy

U2 - 10.1016/j.solener.2021.04.045

DO - 10.1016/j.solener.2021.04.045

M3 - Article

AN - SCOPUS:85107817515

SN - 0038-092X

VL - 221

SP - 384

EP - 392

JO - Solar Energy

JF - Solar Energy

ER -

Broadband solar distributed Bragg reflector design using numerical optimization

Abstract

UN SDGs

Keywords

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