Enhanced up-conversion for photovoltaics via concentrating integrated optics

被引：24
|
作者：
Arnaoutakis, Georgios E. [1 ]
Marques-Hueso, Jose [1 ]
Ivaturi, Aruna [1 ]
Kraemer, Karl W. [2 ]
Fischer, Stefan [3 ]
Goldschmidt, Jan Christoph [3 ]
Richards, Bryce S. [1 ]
机构：
[1] Heriot Watt Univ, Inst Photon & Quantum Sci, Edinburgh EH14 4AS, Midlothian, Scotland
[2] Univ Bern, Dept Chem & Biochem, CH-3012 Bern, Switzerland
[3] Fraunhofer Inst Solar Energy Syst ISE, D-79110 Freiburg, Germany
来源：
OPTICS EXPRESS | 2014年 / 22卷 / 05期
基金：
英国工程与自然科学研究理事会;
关键词：
SOLAR-CELL; SILICON CONCENTRATOR; EFFICIENCY; DEPENDENCE; SUNLIGHT; DEVICES; FIBERS; ER3+; FLUX;
D O I：
10.1364/OE.22.00A452
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Concentrating optics are integrated into up-conversion photovoltaic (UC-PV) devices to independently concentrate sub-band-gap photons on the up-conversion layer, without affecting the full solar concentration on the overlying solar cell. The UC-PV devices consist of silicon solar cells optimized for up-conversion, coupled with tapered and parabolic dielectric concentrators, and hexagonal sodium yttrium fluoride (beta-NaYF4) up-converter doped with 25% trivalent erbium (Er3+). A normalized external quantum efficiency of 1.75x10(-2) cm(2)/W and 3.38x10(-2) cm(2)/W was obtained for the UC-PV device utilizing tapered and parabolic concentrators respectively. Although low to moderate concentration was shown to maximize UC, higher concentration lead to saturation and reduced external quantum efficiency. The presented work highlights some of the implications associated with the development of UC-PV devices and designates a substantial step for integration in concentrating PV. (C)2014 Optical Society of America
引用
收藏
页码：A452 / A464
页数：13
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