Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 658, Issue -, Pages 848-853Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.11.024
Keywords
Up-conversion; A-Si:H solar cell; beta-NaYF4:Yb3+/Ln(3+) (Ln(3+) = Er3+, Ho3+,Tm3+)
Categories
Funding
- National Basic Research Program of China [2011CBA00706]
- National Natural Science Foundation of China [61305080, 60807001]
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Up-conversion is a promising technique for harvesting sub-band-gap photons in photovoltaic devices. The implementation and characterization of rare-earth doped up-converters on a-Si:H solar cells are investigated. Three up-conversion phosphors, beta-NaYF4:Yb3+ 20%/Er3+ 1%, beta-NaYF4:Yb3+ 25%/Ho3+ 1% and beta-NaYF4:Yb3+ 60%/Tm3+ 0.5%, are developed and employed as low energy convert materials for a-Si: H solar cells. Two different ways of adhering the up-converter to the a-Si:H solar cell have been implemented: by dissolving the powder in the polydimethylsiloxane (PDMS) and by compressing it into solid slice with a tablet pressing machine. The performance of a-Si:H solar cells integrating the up-converters is investigated under both 980 nm infrared laser diode and simulated solar light source (AM1.5G) illumination. The Current-Voltage measurements reveal that the beta-NaYF4:Yb3+ 20%/Er3+ 1% up-conversion phosphor performs both up-conversion and scattering functions in improving the overall performance of a-Si:H solar cell. (C) 2015 Elsevier B.V. All rights reserved.
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