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dc.contributor.authorHe, Junwen
dc.contributor.authorYao, Yuan
dc.contributor.authorLee, Kyu-Tae
dc.contributor.authorHong, Nina
dc.contributor.authorFisher, Brent
dc.contributor.authorBahabry, Rabab R.
dc.contributor.authorLee, Jung Woo
dc.contributor.authorKim, Jeonghyun
dc.contributor.authorHan, Seungyong
dc.contributor.authorKalidindi, Sanjay V.
dc.contributor.authorKim, Jae-Hwan
dc.contributor.authorKim, Sung Bong
dc.contributor.authorChoi, Jaewon
dc.contributor.authorJang, Hongwoo
dc.contributor.authorNamkoong, Myeong
dc.contributor.authorBurroughs, Scott
dc.contributor.authorHussain, Muhammad Mustafa
dc.contributor.authorNuzzo, Ralph G.
dc.contributor.authorRogers, John A.
dc.date.accessioned2018-10-09T13:11:32Z
dc.date.available2018-10-09T13:11:32Z
dc.date.issued2018-10-08
dc.identifier.citationHe J, Yao Y, Lee K-T, Hong N, Fisher B, et al. (2018) Solution processes for ultrabroadband and omnidirectional graded-index glass lenses with near-zero reflectivity in high concentration photovoltaics. Scientific Reports 8. Available: http://dx.doi.org/10.1038/s41598-018-33200-9.
dc.identifier.issn2045-2322
dc.identifier.doi10.1038/s41598-018-33200-9
dc.identifier.urihttp://hdl.handle.net/10754/628912
dc.description.abstractConcentrator photovoltaic (CPV) systems, where incident direct solar radiation is tightly concentrated onto high-efficiency multi-junction solar cells by geometric optical elements, exhibit the highest efficiencies in converting the sun’s energy into electric power. Their energy conversion efficiencies are greatly limited, however, due to Fresnel reflection losses occurring at three air/optics interfaces in the most sophisticated dual-stage CPV platforms. This paper describes a facile one-step wet-etching process to create a nanoporous surface with a graded-index profile on both flat and curved glasses, with capabilities of achieving ~99% average transmission efficiency in a wide wavelength range from 380 nm to 1.3 µm and for a wide range of incident angles up to ±40° regardless of the polarization state of incident sunlight. The simplicity of the etching process remarkably increases their versatility in various optical elements that require unconventional form factors such as Fresnel lenses and microlens arrays, and/or demanding curvatures along with much reduced dimensions such as ball lenses. Etched glass surfaces on two-stage optical concentrating systems yield enhancements in total optical transmission efficiencies by 13.8% and in the photocurrent by 14.3%, as experimentally determined by measurements on microscale triple-junction solar cells. The presented strategy can be widely adapted in a variety of applications such as image sensors, display systems, and other optoelectronic devices.
dc.description.sponsorshipThis work is part of the ‘Light-Material Interactions in Energy Conversion’ Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001293. This work was also supported in part by the Ministry of Trade, Industry and Energy (MOTIE, No. 10051565) and Korea Display Research Corporation (KDRC) support program for the development of future devices technology for display industry. This work was also supported by Pusan National University Research Grant, 2017. J.K. gratefully acknowledges the support from the Research Grant of Kwangwoon University in 2018. S.H. was supported by the new faculty research fund of Ajou University and the Ajou university research fund. The authors thank K. Walsh, R. Haasch and H. Zhou in UIUC for their assistance with materials characterization and J. VanDerslice at J. A. Woollam Co. for helpful discussions on the EEP results.
dc.publisherSpringer Nature
dc.relation.urlhttps://www.nature.com/articles/s41598-018-33200-9
dc.rightsThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleSolution processes for ultrabroadband and omnidirectional graded-index glass lenses with near-zero reflectivity in high concentration photovoltaics
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentIntegrated Nanotechnology Lab
dc.identifier.journalScientific Reports
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionDepartment of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
dc.contributor.institutionDepartment of Physics, Inha University, Incheon, 22212, Republic of Korea
dc.contributor.institutionJ. A. Woollam Co., Inc, Lincoln, NE, 68508, USA
dc.contributor.institutionSemprius, Durham, NC, 27713, USA
dc.contributor.institutionDepartment of Physics, Faculty of Science-Al Faisaliah Campus, University of Jeddah, Jeddah, 21589-80200, Saudi Arabia
dc.contributor.institutionDepartment of Materials Science and Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
dc.contributor.institutionDepartment of Electronics Convergence Engineering, Kwangwoon University, Nowon-gu, Seoul, 01897, Republic of Korea
dc.contributor.institutionDepartment of Mechanical Engineering, Ajou University, San 5, Woncheon-Dong, Yeongtong-Gu, Suwon, 16499, Republic of Korea
dc.contributor.institutionDepartment of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
dc.contributor.institutionDepartment of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
kaust.personHussain, Muhammad Mustafa
refterms.dateFOA2018-10-09T13:35:22Z
dc.date.published-online2018-10-08
dc.date.published-print2018-12


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This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Except where otherwise noted, this item's license is described as This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.