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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Liu, Jie Zheng, Xiao Luo, Hongde Shi, Xiumeng Li, Xiaoqing Liu, Pujun Yao, Zhiling Hou, Binghu Xia, Yusheng Yu, Xibin |
| Copyright Year | 2014 |
| Abstract | Highly efficient Cr3+- and Yb3+/Nd3+-co-activated YAl3(BO3)4 (YAB) phosphors have been developed as spectral convertors for improving silicon solar cell photovoltaic conversion efficiency. In the YAB lattice, Cr3+ ions act as broadband spectral sensitizers by absorbing UV-Vis (370–750 nm) photons, which are not absorbed by the silicon solar cell. After energy transfer, the Yb3+ acceptors then exhibit strong NIR emission centered at around 1000 nm, which is coupled well with the absorption band of the silicon solar cell. Efficient energy transfer is reflected by a sharp decrease in the excited state lifetime and red photoluminescence (PL) from Cr3+ with increasing Yb3+ concentration. Further evidence in favor of energy transfer is that PL-excitation spectra of NIR luminescence from Yb3+ are identical to those of deep red emission from Cr3+. Trivalent ions Gd3+, Bi3+ and La3+ have been introduced into YAl3(BO3)4:Cr3+,Yb3+ in this study for a stronger NIR PL intensity. Additionally, energy transfer from Cr3+ to Nd3+ is also observed. Yb3+,Nd3+-co-activated YAB shows much broader NIR emission. Due to the effective absorption of Cr3+ in the visible region in YAB and the efficient energy transfer to Yb3+/Nd3+, these materials can be developed as spectral convertors to improve silicon solar cell photovoltaic conversion efficiency. |
| Starting Page | 5769 |
| Ending Page | 5777 |
| Page Count | 9 |
| File Format | HTM / HTML PDF |
| ISSN | 20507526 |
| Volume Number | 2 |
| Issue Number | 29 |
| Journal | Journal of Materials Chemistry C |
| DOI | 10.1039/c4tc00482e |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | NIR Convertors Solar cell Crystal structure Electromagnetic spectrum Absorption band Photoluminescence Luminescence Red Bismuth |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Materials Chemistry |
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