Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7905900 | Optical Materials | 2018 | 7 Pages |
Abstract
Yb3+/Mn4+ co-doped La2ZnTiO6 (brief as LZT:Yb3+/Mn4+) phosphors with xYb3+ (xâ¯=â¯0-0.12) and yMn4+ (yâ¯=â¯0-0.01) doping concentrations have been synthesized via a sol-gel method. X-ray diffraction (XRD) and photoluminescence spectra were employed to characterize the properties of final products. The LZT:Yb3+/Mn4+ material can efficiently convert the short-wavelength sunlight in wide spectral ranges (250-600â¯nm) into near-infrared emission around 990â¯nm which matches the higher photosensitivity region of Si-based solar cells. A dipole-dipole interaction plays an important role for the energy transfer process from Mn4+ to Yb3+ ions, which has been verified by Dexter's theory. Under the 390â¯nm excitation, the energy transfer efficiency is 38.6% in the La1·9ZnTi0·998O6:0.1Yb3+/0.002Mn4+ co-doped sample. Due to the effective absorption of Mn4+ in the visible region and charge transfer transitions (O2ââYb3+ and O2ââMn4+) in the UV region for LZT and the efficient energy transfer to Yb3+, this material can be developed as spectral convertors to improve silicon solar cell photovoltaic conversion efficiency.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Jinsheng Liao, Liyun Kong, Qi Wang, Jinqiong Li, Guanghuai Peng, Yijian Sun, Herui Wen,