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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gu S., Xia M., Zhou C., Kong Z., Molokeev M. S., Liu L., Wong W. -Y., Zhou Z.
Заглавие : Red shift properties, crystal field theory and nephelauxetic effect on Mn4+-doped SrMgAl10-yGayO17 red phosphor for plant growth LED light
Место публикации : Chem. Eng. J. - 2020. - Vol. 396. - Ст.125208. - ISSN 13858947 (ISSN), DOI 10.1016/j.cej.2020.125208
Примечания : Cited References: 54. - The authors would like to gratefully acknowledge funds from the National Natural Science Foundation of China (Grant No. 21706060 , 51703061 , 51974123 ), the Hunan Graduate Research and Innovation Project (Grant No. CX2018B396 ), the Hunan provincial Engineering Technology Research Center for Optical Agriculture (Grant No. 2018TP2003 ), the Scientific Research Fund of Hunan Provincial Education Department (15K058, 19C0903 ), the Natural Sciences Foundation of Hunan agricultural university, China (Grant No. 19QN11 ), Science and Technology project of Changsha ( KH1801219 ), Huxiang high level talent gathering project ( 2019RS1077 ), Double first-class construction project of Hunan Agricultural University (SYL201802002&SYL201802002). L. Liu thanks the National Natural Science Foundation of China ( 21671061 ) and application foundation frontier special project by Wuhan Science and Technology Bureau ( 2019010701011414 ) for the support of this work. W.-Y. Wong acknowledges the financial support from the Hong Kong Research Grants Council (C4006-17G and PolyU 153058/19P), the Hong Kong Polytechnic University ( 1-ZE1C ) and Ms Clarea Au for the Endowed Professorship in Energy (847S)
Аннотация: The discovery of novel Mn4+-doped oxide red phosphor with suitable spectrum for plant growth is a hot issue in the recent years due to the characteristic red photoluminescence of 2Eg → 4A2 transition in Mn4+ ions. Generally, the emission position of Mn4+ is hard to tune because of specific crystal field in most phosphors. In this work, tunable luminescence property with obvious red shift in the spectra is observed in the Mn4+-doped SrMgAl10-yGayO17 red phosphor via simple substitution of Ga3+ for Al3+, and crystal field theory and nephelauxetic effect are employed to explain this phenomenon. Meanwhile, the Ga3+ dopant changes the shape of the spectra because Ga3+ dopant guides the replacement site of Mn4+ and changes the luminescence center. Improved emission intensity is obtained because appropriate Ga3+ doping leads to larger band gap and reduces non-radiative transitions. Phosphor-converted LED (pc-LED) devices fabricated with blue chip (470 nm) and the as-obtained SrMgAl10-yGayO17:1.0%Mn4+ phosphors emit bright blue and red light, which fit the absorption regions of plant pigments well, thus SrMgAl10-yGayO17:Mn4+ phosphor can be a candidate for plant growth LED light.
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