A Highly Efficient Eu2+ Excited Phosphor with Luminescence Tunable in Visible Range and Its Applications for Plant Growth

• DOI: 10.1002/adom.202101173
• Publication Date: 2021-09-12T18:28:37Z
• Authors: Ziyong Kang; Shichuan Wang; Takatoshi Seto; Yuhua Wang
• Keywords: Cyan; Stokes shift

Abstract A series of Rb x K 2− CaPO 4 F:Eu 2+ phosphors are synthesized using a high‐temperature solid‐phase method. An increase in the + concentration leads to Eu ‐excited phosphor emission spectra being shifted from red cyan. Interestingly, excitation spectrum does not exhibit any variations, which indicates possibility mixing (Rb 0.2 1.8 ) and cyan 2 for plant growth. This luminescence tuning is attributed substitution with , produces an inferior crystal‐field splitting that increases energy at lowest 5d level, enhances rigidity crystal structure, results gradual decrease Stokes shift consequent blue spectrum. Time‐resolved photoluminescence spectroscopy further confirms occurrence broadband owing occupation multiple sites by . Light‐emitting devices appropriate growth fabricated two 380‐nm UV chip, light‐conversion film prepared PDMS glue. The Chlorella‐based experiment reveals rate Chlorella 12.2% higher than blank group, indicating favorable effect on