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Near-infrared (NIR) luminescence phosphor have great potential in food analysis and bio-imaging; therefore, a development of efficient NIR phosphor is in a high demand. In this work, the Bi3+ sensitized NIR luminescence nanophosphors Gd2MoO6:Yb were successfully synthesized with a solvothermal reaction technique. The luminescence property was evaluated with not only photoluminescence (PL) and PL excitation (PLE) spectra and also the time-resolved PL spectra with different temperature. To understand the PL mechanism, furthermore, an electronic structure was investigated with DFT calculation. The GMO:Bi,Yb showed NIR luminescence due to the 4f-4f transition of Yb3+ under the UV light excitation, and the luminescence was sensitized by Bi3+ ions doping. From the PL spectra in visible region, the intensity was also enhanced by Bi3+ doping; however, the additional peak was not observed, which means that the enhancing mechanism was not explained by general enhancing mechanism. The time-resolved PL spectra, wavelength-dependent PLE spectra and theoretical calculation of GMO:Bi confirmed that the MMCT transition between Mo6+ and Bi3+ ions contributed to its enhancement. The perspective in this study about enhancing mechanism using MMCT transition between Bi3+ and Mo6+ was useful to develop an efficient Yb3+-doped NIR luminescence phosphor.

権利情報:

• In Copyright
  This document is the Accepted Manuscript version of a Published Work that appeared in final form in Key Role of Metal-to-Metal Charge Transfer Transition between Mo6+ and Bi3+ for Enhancement in NIR Luminescence of Gd2MoO6:Bi,Yb Nanophosphor, copyright © 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.3c07501

キーワード: NIR

刊行年月日: 2024-02-29

出版者: American Chemical Society (ACS)

掲載誌:

• The Journal of Physical Chemistry C (ISSN: 19327447) p. 3351-3360

研究助成金:

• Ministry of Education, Culture, Sports, Science and Technology JP22H05146
• Ministry of Education, Culture, Sports, Science and Technology JP21K03400
• Ministry of Education, Culture, Sports, Science and Technology JP19H04692
• Ministry of Education, Culture, Sports, Science and Technology JPMJFS2102
• Murata Science Foundation
• Air Force Office of Scientific Research AFOSR-AOARD/FA2386-17-1-4049
• Air Force Office of Scientific Research FA2386-19-1-4015
• Japan Society for the Promotion of Science 22K05264
• Japan Society for the Promotion of Science 20K15106
• National Institute for Materials Science
• Japan Science and Technology Corporation
• Japan Society for the Promotion of Science 20H00297

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4557

公開URL: https://doi.org/10.1021/acs.jpcc.3c07501

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更新時刻: 2025-03-01 12:30:27 +0900

MDRでの公開時刻: 2025-03-01 12:30:28 +0900