Design and demonstration of ultra-compact microcell concentrating photovoltaics for space

被引:10
|
作者
Ruud, Christian J. [1 ]
Grede, Alex J. [2 ]
Chang, Jan-Kai [3 ]
Lumb, Matthew P. [4 ]
Schmieder, Kenneth J. [5 ]
Fisher, Brent [6 ]
Rogers, John A. [3 ,7 ]
Gordon, Jeffrey M. [8 ]
Giebink, Noel C. [2 ]
机构
[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
[2] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA
[3] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA
[4] George Washington Univ, Washington, DC 20037 USA
[5] US Naval Res Lab, Washington, DC 20375 USA
[6] H NU Syst LLC, Bethesda, MD 20817 USA
[7] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA
[8] Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Dept Solar Energy & Environm Phys, Sede Boqer Campus, IL-8499000 Beer Sheva, Israel
关键词
SOLAR; PERFORMANCE; COATINGS;
D O I
10.1364/OE.27.0A1467
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Optical concentration can improve the efficiency and reduce the cost of photovoltaic power but has traditionally been too bulky, massive, and unreliable for use in space. Here, we explore a new ultra-compact and low-mass microcell concentrating photovoltaic (mu CPV) paradigm for space based on the monolithic integration of transfer-printed microscale solar cells and molded microconcentrator optics. We derive basic bounds on the compactness as a function of geometric concentration ratio and angular acceptance, and show that a simple reflective parabolic concentrator provides the best combination of specific power, angular acceptance, and overall fabrication simplicity. This architecture is simulated in detail and validated experimentally with a mu CPV prototype that is less than 1.7 mm thick and operates with six, 650 mu m square triple-junction microcells at a geometric concentration ratio of 18.4x. In outdoor testing, the system achieves a terrestrial power conversion efficiency of 25.8 +/- 0.2% over a +/- 9.50 degrees angular range, resulting in a specific power of approximately 111 W/kg. These results lay the groundwork for future space mu CPV systems and establish a realistic path to exceed 350 W/kg specific power at >33% power conversion efficiency by scaling down to even smaller microcells. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码:A1467 / A1480
页数:14
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