Enhanced near-infrared response of a-Si:H solar cells with β-NaYF4:Yb3+ (18%), Er3+ (2%) upconversion phosphors

被引：209

作者：

de Wild, J. ^{[1
]}

Rath, J. K. ^{[1
]}

Meijerink, A. ^{[1
]}

van Sark, W. G. J. H. M. ^{[1
]}

Schropp, R. E. I. ^{[1
]}

机构：

[1] Univ Utrecht, Fac Sci, Debye Inst Nanomat Sci, NL-3508 TA Utrecht, Netherlands

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2010年 / 94卷 / 12期

关键词：

Upconversion; a-Si:H solar cells; Thin film; LUMINESCENCE; EFFICIENCY;

D O I：

10.1016/j.solmat.2010.08.024

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A near-infrared to visible upconversion phosphor (beta-NaYF4:Yb3+ (18%), Er3+ (2%)) has been applied at the back of a thin film hydrogenated amorphous silicon (a-Si:H) solar cell in combination with a white back reflector to investigate its response to sub-bandgap infrared irradiation. Current-voltage measurements were performed on the solar cells. A maximum current enhancement of 6.2 mu A was measured on illumination with a 980 nm diode laser at 28 mW. This corresponds to an external quantum efficiency (EQE) of 0.03% of the solar cell. A small part, 0.01%, was due to the direct absorption of sub-bandgap radiation but the larger part originates from upconversion. These experiments constitute a proof-of-principle for the utilization of photon upconversion in thin film solar cells. A close match between the non-linear behavior of the upconversion material and the EQE was found by varying the intensity of the laser light. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2395 / 2398

页数：4

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