RT Journal Article
T1 Kinetic study of the thermal quenching of the ultraviolet emission in Zn_2GeO_4 microrods
A1 Dolado Fernández, Jaime
A1 Hidalgo Alcalde, Pedro
A1 Méndez Martín, María Bianchi
AB Zn_2GeO_4 microrods obtained by thermal evaporation of a compacted powder mixture of ZnO and Ge exhibit quite intense UV luminescence at low temperatures. Herein, the luminescence properties of Zn_2GeO_4 microrods are studied for 2:1 and 1:1 ZnO:Ge ratio in the precursor mixture. In both cases, Zn2GeO4 microrods of high crystal quality produce a 355 nm emission under aforementioned bandgap excitation conditions at low temperatures. However, this emission vanishes at room temperature (RT) in the 1:1 samples while it is kept in the 2:1 ones. Herein this work, the thermal quenching of the UV luminescence is studied by means of steady and time-resolved photoluminescence techniques from 4 K up to RT for both Zn_2GeO_4 microrods. The analysis of the results leads us to conclude that although the luminescence mechanisms are the same in both cases, a higher decay rate is observed in the 1:1 in both intensity and lifetime, which explain the observed thermal quenching at RT.
PB Wiley-V C H VERLAG GMBH
SN 1862-6254
YR 2022
FD 2022
LK https://hdl.handle.net/20.500.14352/71403
UL https://hdl.handle.net/20.500.14352/71403
LA eng
NO CRUE-CSIC (Acuerdos Transformativos 2022)©2022 WILEY-V C H VERLAG GMBHThis work has been supported by MINECO projects M-ERA.NET PCIN-2017-106 and MICINN project (RTI2018-097195-B-I00). We thank the CAI (UCM) for XRD facilities.
NO Ministerio de Ciencia e Innovación (MICINN)/ FEDER
NO Ministerio de Ciencia e Innovación (MICINN)/M-ERA.Net
DS Docta Complutense
RD 28 sept 2024