Revisiting Cr3+-doped Bi2Ga4O9 spectroscopy: crystal field effect and optical thermometric behavior of near-infrared-emitting singly-activated phosphors

Michele Back , Jumpei Ueda , Mikhail G. Brik , Tadeusz Leśniewski , Marek Grinberg , Setsuhisa Tanabe


The increasing interest in the development of ratiometric optical thermal sensors has led to a wide variety of new systems with promising properties. Among them, singly-doped ratiometric thermometers were recently demonstrated to be particularly reliable. With the aim to discuss the development of an ideal optical thermal sensor, a combined experimental and theoretical insight into the spectroscopy of the Bi2Ga4O9:Cr3+ system is reported showing the importance of an insightful analysis in a wide temperature range. Low-temperature photoluminescence analysis (from 10 K) and the temperature dependence of the lifetime investigation, together with the crystal field analysis and the modeling of the thermal quenching process, allow the estimation of key parameters such as the Debye temperature (cutoff frequency), the Huang–Rhys parameter, and the energy barrier between 2Eg and 4T2g. Additionally, by considering the reliable class of singly-doped ratiometric thermometers based on a couple of excited states obeying the Boltzmann law, the important role played by the absolute sensitivity was discussed and the great potential of Cr3+ singly-activated systems was demonstrated. The results may provide new guidelines for the design of reliable optical thermometers with outstanding and robust performances.
Author Michele Back
Michele Back,,
, Jumpei Ueda
Jumpei Ueda,,
, Mikhail G. Brik
Mikhail G. Brik,,
, Tadeusz Leśniewski (FMPI/IEP)
Tadeusz Leśniewski ,,
- Institute of Experimental Physics
, Marek Grinberg (FMPI/IEP)
Marek Grinberg,,
- Institute of Experimental Physics
, Setsuhisa Tanabe
Setsuhisa Tanabe,,
Journal seriesACS Applied Materials & Interfaces, ISSN 1944-8244, (A 40 pkt)
Issue year2018
Publication size in sheets0.60
ASJC Classification2500 General Materials Science
Languageen angielski
Score (nominal)40
Score sourcejournalList
ScoreMinisterial score = 40.0, 28-01-2020, ArticleFromJournal
Publication indicators WoS Citations = 8.000; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.539; WoS Impact Factor: 2018 = 8.456 (2) - 2018=8.694 (5)
Citation count*25 (2020-07-28)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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