Near-Infrared Quantum Cutting Platform in Thermally Stable Phosphate Phosphors for Solar Cells

详细信息    查看全文

• 作者：Tzu-Chen Liu ; Gongguo Zhang ; Xuebin Qiao ; Jing Wang ; Hyo Jin Seo ; Din-Ping Tsai ; Ru-Shi Liu
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：July 1, 2013
• 年：2013
• 卷：52
• 期：13
• 页码：7352-7357
• 全文大小：430K
• 年卷期：v.52,no.13(July 1, 2013)
• ISSN：1520-510X

文摘

This study investigated the photoluminescent properties of Tb³⁺鈥揧b³⁺-, Ce³⁺鈥揟b³⁺鈥揧b³⁺-, and Eu²⁺鈥揧b³⁺-doped KSrPO₄. The samples were prepared by a solid-state reaction with various doping concentrations. Emission at near-infrared range was focused on the application of luminescent solar concentrator for solar cells. Quantum cutting (QC) energy transfer was confirmed by the lifetimes of the donor. Near-infrared QC involved emission of Yb³⁺ ions was achieved by excitation of Ce³⁺, Tb³⁺, and Eu²⁺ ions, where the energy transfer processes occurred from Ce³⁺ to Tb³⁺ to Yb³⁺, Tb³⁺ to Yb³⁺, and Eu²⁺ to Yb³⁺, respectively. In addition, the concentration quenching effect of Yb³⁺ ions was avoided by low doping concentrations. The overall quantum efficiencies were calculated, and the maximum efficiency reaches 139%. The energy diagrams for divalent and trivalent rare-earth ions in KSrPO₄ host lattice were analyzed. Results of this study demonstrate that heat-stable phosphate phosphors are promising candidates for increasing the efficiency of silicon-based solar cells.