Greatly enhanced deep-red luminescence performance of Ca2InSbO6:Mn4+ phosphor via multiple optimization strategies. (December 2022)

• Record Type: Journal Article
• Authors: Geng, X.; Xie, Y.; Hu, X.; Ouyang, X.; Chen, S.; Yao, X.; Kong, J.; Chen, J.; Guo, J.; Wang, H.; Zhou, W.; Yu, R.
• Is Part Of: Materials today chemistry. Volume 26(2022)
• Publication Date: 2022-12
• Subjects: Mn4+ -- Indoor plant cultivation -- Optimization -- Deep-red -- phosphors; Chemistry -- Periodicals; Materials -- Research -- Periodicals; Materials science -- Periodicals; Chemistry; Materials -- Research; Electronic journals; Periodicals; 660.282
• DOI: 10.1016/j.mtchem.2022.101006
• Languages: English
• ISSNs: 2468-5194

Abstract

Abstract: Phosphors with high luminescence intensity, thermal stability, and spectral matching are important for indoor plant cultivation (IPC) light-emitting diodes (LEDs). Mn 4+ ion-doped phosphors are considered potential deep-red emitters for plant growth LEDs. Herein, Ca2 InSbO6 :Mn 4+ (CISO:Mn 4+ ) phosphors were first synthesized via high-temperature solid-phase method. Their luminescence performance was greatly enhanced by using three kinds of strategies (charge compensator, solid solution, and rare earth ion co-doping). Furthermore, the optimization mechanisms were studied in depth on the basis of the principle of charge compensation and reduced quenching centers. Surprisingly, the internal quantum efficiency of the Ca1·9 Y0·1 InSb0·6 Ta0·4 O6 :0.006Mn 4+ phosphor was greatly enhanced to 71.4%, which was 42.75 times that of the CISO:0.006Mn 4+ phosphor. Under 373 nm excitation, the Ca1·9 Y0·1 InSb0·6 Ta0·4 O6 :0.006Mn 4+ phosphor showed intense deep-red emission at 695 nm attributed to the 2 Eg → 4 A2g transition of Mn 4+ ions, which indicated a good match with far red phytochrome (Pfr, 84%). Finally, the fabricated IPC-LED displayed superior spectral matching, color purity (99.9%), and CIE chromaticity coordinates (0.692, 0.308). Thus, it has great potential as deep-red substitutes in the field of IPC. This work adopted a series of comprehensive strategies to optimize the luminescence performance of Mn 4+ -doped oxide phosphors and discussed the optimization mechanisms in depth, aiming to provide new ideas for the future optimization of phosphors. Highlights: The luminescence performance of CISO:0.006Mn 4+ phosphor was greatly enhanced using three kinds of strategies. The optimization mechanisms were studied in depth on the basis of the principle of charge compensation and reduced quenching centers. The internal quantum efficiency (IQE) of the Ca1·9 Y0·1 InSb0·6 Ta0·4 O6 :0.006Mn 4+ phosphor was42.75 times that of the CISO:0.006Mn 4+ phosphor. The fabricated IPC-LED displayed superior spectral matching, color purity (99.9%), and CIE chromaticity coordinates (0.692, 0.308).