TY - JOUR
T1 - Broadband solar distributed Bragg reflector design using numerical optimization
AU - Kim, Hansol
AU - Kaya, Mine
AU - Hajimirza, Shima
N1 - Publisher Copyright:
© 2021 International Solar Energy Society
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 - http://www.scopus.com/inward/record.url?scp=85107817515&partnerID=8YFLogxK
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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 -