Affiliation:
1. Basic Teaching Department Guangzhou Maritime University Hongshan Three Road, No. 101 Guangzhou 510725 China
2. School of Optoelectronic Engineering Guangdong Polytechnic Normal University Zhongshan Avenue No. 293 West, Tianhe District Guangzhou 510665 China
3. Shandong Key Laboratory of Biophysics Institute of Biophysics Dezhou University University Rd. No. 566 West, Decheng District Dezhou 253023 China
Abstract
AbstractNIR luminescent materials are widely available for biological applications, and the NIR emitting of Ho3+ ions has received widespread attention in the second biological window. In this work, Ca14Zn6Ga10O35 : Mn4+,Ho3+ luminescent materials were synthesized using a high temperature solid state method. Optical properties and energy transfer mechanisms have studied in detail. Upon UV‐vis light excitation, the Mn single doped Ca14Zn6Ga10O35 phosphors exhibit deep red and NIR emission centered at 712 and 1151 nm assigned to Mn4+ and Mn5+, respectively. Another stronger NIR emitting peaked at 1195 nm occurs when the Ho3+ ion is co‐doped into Ca14Zn6Ga10O35 : Mn4+. The energy transfer from Mn4+ to Ho3+ ion is performed through a resonant type by a dipole‐dipole interaction mechanism. In addition, the thermal stability of Ca14Zn6Ga10O35 : Mn4+,Ho3+ phosphor has been investigated, and the NIR emission of Ho3+ ion maintains more than half the strength at 423 K. The findings indicate that the as‐prepared Ca14Zn6Ga10O35 : Mn4+,Ho3+ luminescent materials hold promise for potential applications in the second biological window.
Funder
Basic and Applied Basic Research Foundation of Guangdong Province
National Natural Science Foundation of China
Natural Science Foundation of Shandong Province
China Postdoctoral Science Foundation