Near-infrared quantum cutting platform in thermally stable phosphate phosphors for solar cells

T.-C. Liu, G. Zhang, X. Qiao, J. Wang, H.J. Seo, Din-ping Tsai, R.-S. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

35 Citations (Scopus)

Abstract

This study investigated the photoluminescent properties of Tb 3+-Yb3+-, Ce3+-Tb3+-Yb 3+-, and Eu2+-Yb3+-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+, Tb 3+ 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. © 2013 American Chemical Society.
Original languageEnglish
Pages (from-to)7352-7357
Number of pages6
JournalInorganic Chemistry
Volume52
Issue number13
DOIs
Publication statusPublished - 1 Jul 2013
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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