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Strong light emission from stress-activated perovskite-related oxides

Published online by Cambridge University Press:  10 May 2013

Sunao Kamimura ,
Hiroshi Yamada  and
Chao-Nan Xu
Sunao Kamimura
Affiliation:
Interdisciplinary Graduate School of Engineering Science, Kyushu University, Fukuoka 816-8580, Japan
Hiroshi Yamada
Affiliation:
Interdisciplinary Graduate School of Engineering Science, Kyushu University, Fukuoka 816-8580, Japan National Institute of Advanced Industrial Science and Technology (AIST), Saga 841-0052, Japan
Chao-Nan Xu*
Affiliation:
Interdisciplinary Graduate School of Engineering Science, Kyushu University, Fukuoka 816-8580, Japan National Institute of Advanced Industrial Science and Technology (AIST), Saga 841-0052, Japan International Institute for Carbon-Neutral Energy Research (WPI-I2CNER) , Kyushu University, Fukuoka 819-0395, Japan
*
*)Author to whom correspondence should be addressed. Electronic mail: [email protected]
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Abstract

We report mechanoluminescence (ML) in Sm3+-doped Sr3Sn2O7 phosphors with perovskite-related structure. The ML from Sr3Sn2O7:Sm3+, emitted strong reddish-orange light upon compression, is clearly observable by naked eyes. Based on the comparison between ML spectrum and photoluminescence spectrum, the ML emission was identified to be due to electron transition from an excited state 4G5/2 to the ground state 6HJ (J = 5/2, 7/2, 9/2) in Sm3+ ions. Although the ML emission was gradually decayed as compressive load was applied repeatedly, it recovered completely upon irradiation with UV light (254 nm). This behavior indicating that ML of Sr3Sn2O7:Sm3+ is intimately related to the charge traps. The charge transfer state (CTS) band in the PL excitation spectra was observed for Sr3Sn2O7:Sm3+, indicating that the efficient energy transfer from the host to the Sm3+ ions. The formation of CTS and the charge traps may be responsible for this ML performance.

Keywords

luminescencephotoemissionenergy storage
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1492: Symposium D/G – Materials for Sustainable Development—Challenges and Opportunities , 2013 , pp. 117 - 122
Copyright
Copyright © Materials Research Society 2013 

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References

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