Bi3+ sensitizer induced efficient deep-red luminescence in Mn4+-doped 4SrO‧7Al2O3 toward the applications of plant growth lamp

Ye Zhang; Zouguo Zeng; Guoqing Li; Peixin Gao; Yanan Li; Mao Xia; Zhi Zhou

doi:10.1016/j.saa.2023.123122

Bi³⁺ sensitizer induced efficient deep-red luminescence in Mn⁴⁺-doped 4SrO‧7Al₂O₃ toward the applications of plant growth lamp

Spectrochim Acta A Mol Biomol Spectrosc. 2023 Dec 5:302:123122. doi: 10.1016/j.saa.2023.123122. Epub 2023 Jul 8.

Authors

Ye Zhang¹, Zouguo Zeng¹, Guoqing Li¹, Peixin Gao¹, Yanan Li², Mao Xia¹, Zhi Zhou³

Affiliations

¹ School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China; Hunan Optical Agriculture Engineering Technology Research Center, Changsha 410128, PR China.
² Hunan Optical Agriculture Engineering Technology Research Center, Changsha 410128, PR China; College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, PR China.
³ School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China; Hunan Optical Agriculture Engineering Technology Research Center, Changsha 410128, PR China. Electronic address: zhouzhi@hunau.edu.cn.

PMID: 37478756
DOI: 10.1016/j.saa.2023.123122

Abstract

In the natural environment, light is an indispensable factor affecting plant growth, and plant growth phosphor-converted light emitting diodes (pc-LED) for an artificial light source can play a role in accelerating photosynthesis and development of indoor plants. In this work, we obtained a series of red-emitting phosphors Bi³⁺, Mn⁴⁺ co-doped 4SrO‧7Al₂O₃, which were synthesized by sol-gel method, and red-light emission enhancement through doping of sensitizer Bi³⁺. The energy transfer process and mechanism were analyzed by photoluminescence spectra and fluorescence lifetime. And it thermal stability was 58.50% at 423 K, which show that the phosphor has good photostability. The red and blue dual emission of the packaged LED device can better match the absorption spectra required by chlorophyll a, b and phytochrome P_R of plants. Therefore, the as-prepared phosphor has a certain development prospect in the application of plant growth LEDs.

Keywords: Energy transfer; Red emission phosphor; pc-LED, plant growth lamp.