Ningning Feng , Rui Huang , Guoqing Zhang , Lin Yuan , Hua Jiao , Jiangshan Han , Dezhong Cao , Boyu Wang , Kang Zhao
{"title":"Energy transfer and tunable photoluminescence of novel white-emitting Sr8MgY(PO4)7: Ce3+/Eu2+/Sm3+ phosphors","authors":"Ningning Feng , Rui Huang , Guoqing Zhang , Lin Yuan , Hua Jiao , Jiangshan Han , Dezhong Cao , Boyu Wang , Kang Zhao","doi":"10.1016/j.jlumin.2024.120967","DOIUrl":null,"url":null,"abstract":"<div><div>To develop a novel type of white-light-emitting phosphor, we successfully prepared a series of Ce<sup>3+</sup>/Eu<sup>2+</sup>/Sm<sup>3+</sup> activated color-tunable phosphor Sr<sub>8</sub>MgY(PO<sub>4</sub>)<sub>7</sub> (SMYP) through a classical solid-state reaction and crystal structure, luminescent characteristic, energy transfer and systematically investigated thermal stability of as-synthesized samples. The results manifest that the phase purity of Ce<sup>3+</sup>/Eu<sup>2+</sup>/Sm<sup>3+</sup> co-doped SMYP phosphors was verified by the Rietveld structure refinements. Under 315 nm ultraviolet (UV) excitation, the Ce<sup>3+</sup> single-doped SMYP phosphor reveals a broad and strong bluish-violet emission band in the range of 325–480 nm. The outstanding enhancement of Eu<sup>2+</sup> emission intensity is realized by Ce<sup>3+</sup> induced resonance energy transfer (ET). The ET mechanism of Ce<sup>3+</sup>→Eu<sup>2+</sup> is governed by an electronic quadrupole-quadrupole interaction with a high ET efficiency of 89.8 %. In addition, the luminescent color of SMYP: Ce<sup>3+</sup>/Eu<sup>2+</sup> samples can be changed from light green to white by introducing activators Sm<sup>3+</sup> ions. The optimal chromaticity coordinate could be adjusted to (0.311, 0.343), which is the closest to the ideal white light coordinate (0.330, 0.330). To achieve white light, a white LED device fabricated by combining a 310 nm chip with the SMYP: Ce<sup>3+</sup>/Eu<sup>2+</sup>/Sm<sup>3+</sup> phosphor shows a high color rendering index (CRI = 87.2) along with a low correlated color temperature (CCT≈4056.7 K) under the stimulation of 5 V voltage and 100 mA current. The above results show that SMYP: Ce<sup>3+</sup>/Eu<sup>2+</sup>/Sm<sup>3+</sup> as a single component phosphor has potential application prospects in UV-pumped full-spectrum white LEDs.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120967"},"PeriodicalIF":3.3000,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Luminescence","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022231324005313","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
To develop a novel type of white-light-emitting phosphor, we successfully prepared a series of Ce3+/Eu2+/Sm3+ activated color-tunable phosphor Sr8MgY(PO4)7 (SMYP) through a classical solid-state reaction and crystal structure, luminescent characteristic, energy transfer and systematically investigated thermal stability of as-synthesized samples. The results manifest that the phase purity of Ce3+/Eu2+/Sm3+ co-doped SMYP phosphors was verified by the Rietveld structure refinements. Under 315 nm ultraviolet (UV) excitation, the Ce3+ single-doped SMYP phosphor reveals a broad and strong bluish-violet emission band in the range of 325–480 nm. The outstanding enhancement of Eu2+ emission intensity is realized by Ce3+ induced resonance energy transfer (ET). The ET mechanism of Ce3+→Eu2+ is governed by an electronic quadrupole-quadrupole interaction with a high ET efficiency of 89.8 %. In addition, the luminescent color of SMYP: Ce3+/Eu2+ samples can be changed from light green to white by introducing activators Sm3+ ions. The optimal chromaticity coordinate could be adjusted to (0.311, 0.343), which is the closest to the ideal white light coordinate (0.330, 0.330). To achieve white light, a white LED device fabricated by combining a 310 nm chip with the SMYP: Ce3+/Eu2+/Sm3+ phosphor shows a high color rendering index (CRI = 87.2) along with a low correlated color temperature (CCT≈4056.7 K) under the stimulation of 5 V voltage and 100 mA current. The above results show that SMYP: Ce3+/Eu2+/Sm3+ as a single component phosphor has potential application prospects in UV-pumped full-spectrum white LEDs.
期刊介绍:
The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid.
We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.