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Title: Solution processes for ultrabroadband and omnidirectional graded-index glass lenses with near-zero reflectivity in high concentration photovoltaics

Concentrator 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. Here, the presented strategy can be widely adapted in amore » variety of applications such as image sensors, display systems, and other optoelectronic devices.« less
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [4] ; ORCiD logo [9] ;  [1] ;  [1]
  1. Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
  2. Inha Univ., Incheon (Republic of Korea)
  3. J. A. Woollam Co., Inc., Lincoln, NE (United States)
  4. Semprius, Durham, NC (United States)
  5. Univ. of Jeddah, Jeddah (Saudi Arabia)
  6. Pusan National Univ., Busan (Republic of Korea)
  7. Kwangwoon Univ., Seoul (Republic of Korea)
  8. Ajou Univ., Suwon (Republic of Korea)
  9. King Abdullah Univ. of Science and Technology (KAUST), Thuwal (Saudi Arabia)
Publication Date:
Grant/Contract Number:
SC0001293
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
California Inst. of Technology., Pasadena, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1483634

He, Junwen, Yao, Yuan, Lee, Kyu -Tae, Hong, Nina, Fisher, Brent, Bahabry, Rabab R., Lee, Jung Woo, Kim, Jeonghyun, Han, Seungyong, Kalidindi, Sanjay V., Kim, Jae -Hwan, Kim, Sung Bong, Choi, Jaewon, Jang, Hongwoo, Namkoong, Myeong, Burroughs, Scott, Hussain, Muhammad, Nuzzo, Ralph G., and Rogers, John A.. Solution processes for ultrabroadband and omnidirectional graded-index glass lenses with near-zero reflectivity in high concentration photovoltaics. United States: N. p., Web. doi:10.1038/s41598-018-33200-9.
He, Junwen, Yao, Yuan, Lee, Kyu -Tae, Hong, Nina, Fisher, Brent, Bahabry, Rabab R., Lee, Jung Woo, Kim, Jeonghyun, Han, Seungyong, Kalidindi, Sanjay V., Kim, Jae -Hwan, Kim, Sung Bong, Choi, Jaewon, Jang, Hongwoo, Namkoong, Myeong, Burroughs, Scott, Hussain, Muhammad, Nuzzo, Ralph G., & Rogers, John A.. Solution processes for ultrabroadband and omnidirectional graded-index glass lenses with near-zero reflectivity in high concentration photovoltaics. United States. doi:10.1038/s41598-018-33200-9.
He, Junwen, Yao, Yuan, Lee, Kyu -Tae, Hong, Nina, Fisher, Brent, Bahabry, Rabab R., Lee, Jung Woo, Kim, Jeonghyun, Han, Seungyong, Kalidindi, Sanjay V., Kim, Jae -Hwan, Kim, Sung Bong, Choi, Jaewon, Jang, Hongwoo, Namkoong, Myeong, Burroughs, Scott, Hussain, Muhammad, Nuzzo, Ralph G., and Rogers, John A.. 2018. "Solution processes for ultrabroadband and omnidirectional graded-index glass lenses with near-zero reflectivity in high concentration photovoltaics". United States. doi:10.1038/s41598-018-33200-9. https://www.osti.gov/servlets/purl/1483634.
@article{osti_1483634,
title = {Solution processes for ultrabroadband and omnidirectional graded-index glass lenses with near-zero reflectivity in high concentration photovoltaics},
author = {He, Junwen and Yao, Yuan and Lee, Kyu -Tae and Hong, Nina and Fisher, Brent and Bahabry, Rabab R. and Lee, Jung Woo and Kim, Jeonghyun and Han, Seungyong and Kalidindi, Sanjay V. and Kim, Jae -Hwan and Kim, Sung Bong and Choi, Jaewon and Jang, Hongwoo and Namkoong, Myeong and Burroughs, Scott and Hussain, Muhammad and Nuzzo, Ralph G. and Rogers, John A.},
abstractNote = {Concentrator 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. Here, the presented strategy can be widely adapted in a variety of applications such as image sensors, display systems, and other optoelectronic devices.},
doi = {10.1038/s41598-018-33200-9},
journal = {Scientific Reports},
number = 1,
volume = 8,
place = {United States},
year = {2018},
month = {10}
}

Works referenced in this record:

Improved broadband and quasi-omnidirectional anti-reflection properties with biomimetic silicon nanostructures
journal, December 2007
  • Huang, Yi-Fan; Chattopadhyay, Surojit; Jen, Yi-Jun
  • Nature Nanotechnology, Vol. 2, Issue 12, p. 770-774
  • DOI: 10.1038/nnano.2007.389