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Proceedings Paper

Enhanced near-infrared response of CdS/CdTe solar cell using Tm3+ and Yb3+ co-doped upconverting glass phosphors
Author(s): Z. Pan; D. Whyte; S. H. Morgan; J. Li; A. Alaswad; J. D. Beach; T. R. Ohno; C. A. Wolden
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Paper Abstract

Tm3+ and Yb3+ co-doped upconverting (UC) glass phosphors were used to converting near-infrared to visible light and input to a CdS/CdTe solar cell, therefore to enhance solar cell’s response in the near-infrared of the sub-bandgap region. Current-voltage measurements were performed on the solar cell with a UC glass phosphor. A short-circuit photocurrent enhancement of 31 μA was obtained using a Tm3+and Yb3+ co-doped glass UC phosphor, illuminated by a 980 nm diode laser at 100 mW. This photocurrent response corresponds to external quantum efficiency (EQE) of 0.04 % at 980 nm. For full collection of the UC light in 4π solid angle, the EQE value is expected to reach 1.6 %. The photo-current observed was proportional to the effective UC light intensity from glass UC phosphor. A non-linear relation between the output photo-current and the incident power of the infrared light was observed, similar to the relation between UC intensity and the incident power. UC efficiency of the glass phosphor was calculated using EQE values at both UC wavelengths and at 980 nm.

Paper Details

Date Published: 17 October 2014
PDF: 8 pages
Proc. SPIE 9178, Next Generation Technologies for Solar Energy Conversion V, 91780Q (17 October 2014); doi: 10.1117/12.2059309
Show Author Affiliations
Z. Pan, Fisk Univ. (United States)
D. Whyte, Fisk Univ. (United States)
S. H. Morgan, Fisk Univ. (United States)
J. Li, Colorado School of Mines (United States)
A. Alaswad, Colorado School of Mines (United States)
J. D. Beach, Colorado School of Mines (United States)
T. R. Ohno, Colorado School of Mines (United States)
C. A. Wolden, Colorado School of Mines (United States)


Published in SPIE Proceedings Vol. 9178:
Next Generation Technologies for Solar Energy Conversion V
Oleg V. Sulima; Gavin Conibeer, Editor(s)

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