Near-infrared spectral downshifting in Sr(3−x)(VO4)2: x Nd3+ phosphor
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- 作者：N S Sawala ; K A Koparkar ; N S Bajaj ; S K Omanwar
- 关键词：Downshifting ; energy transfer ; photoluminescence ; Sr(3−x)(VO4)2 ; xNd3+.
- 刊名：Bulletin of Materials Science
- 出版年：2016
- 出版时间：December 2016
- 年：2016
- 卷：39
- 期：7
- 页码：1625-1629
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Materials Science, general; Engineering, general;
- 出版者：Indian Academy of Sciences
- ISSN：0973-7669
- 卷排序：39
文摘
In this study, the spectral downshifting (DS) from ultraviolet (UV) light to near-infrared (NIR) radiation in Sr3(VO4)2:Nd3+ phosphor is reported. The prepared materials were characterized by X-ray powder diffraction (XRD) and photoluminescence (PL) properties along with steady state luminescence time decay curves were studied, which confirmed the energy transfer (ET) from VO\(_{\mathbf {4}}^{{\kern 4pt}\mathbf {3}\boldsymbol {-}}\) ions to Nd3+ ions. The DS phenomenon by phosphor was observed, which involved emission of NIR photons (1075 and 1064 nm) and visible photons (506 nm) from absorbed UV photons at 349 nm. The theoretical energy transfer efficiency (ETE) was calculated with the help of steady state luminescence time decay curves and the maximum ET efficiency approached up to 41.33%. The crystalline silicon (c-Si) cell has maximum efficiency in NIR region of solar spectrum due to an energy band gap of 1.12 eV. Sr3(VO4)2:Nd3+ can be potentially used as a NIR DC phosphor for c-Si solar cells.