当前位置：
X-MOL 学术
›
J. Mater. Chem. C
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Highly efficient and thermally stable broadband near-infrared emitting garnet Ca3Sc2Ge3O12:Cr3+,Ce3+ phosphors for multiple pc-LED applications
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-06-02 , DOI: 10.1039/d3tc01610b Yining Wang 1 , Mengmeng Shang 1 , Yixin Sun 1 , Minliang Deng 1 , Xiaole Xing 1 , Peipei Dang 2 , Jun Lin 2
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-06-02 , DOI: 10.1039/d3tc01610b Yining Wang 1 , Mengmeng Shang 1 , Yixin Sun 1 , Minliang Deng 1 , Xiaole Xing 1 , Peipei Dang 2 , Jun Lin 2
Affiliation
|
With the increasing demand for the application of near-infrared (NIR) spectroscopy in security, agriculture, medical and other fields, people have been seeking efficient and intelligent NIR light sources. Herein, Cr3+ doped Ca3Sc2Ge3O12 (CSGG) broadband NIR phosphors are successfully synthesized. Under excitation of 480 nm, the emission peak of CSGG:Cr3+ is located at 785 nm, and the full width at half maximum (FWHM) is 106 nm. Low photoluminescence spectra (7 K and 77 K) support the broadband NIR emission coming from two Cr3+ luminescence centers occupying ScO6 and CaO8 sites, respectively. CSGG:Cr3+ exhibits excellent thermal stability (97% at 100 °C) and low internal quantum efficiency (IQE = 22%). The introduction of Ce3+ leads to the enhancement of IQE from 22% to 61% due to the following two reasons: the energy transfer from Ce3+ to Cr3+ and the lattice distortion which improves the parity forbidden transition of Cr3+. The mechanism of excellent luminescence thermal stability is revealed from the following perspectives: thermal activation energy, the Huang–Rhys factor and the thermal ionization effect. Benefiting from the excellent performance of CSGG:Cr3+,Ce3+ NIR phosphors, the combination with blue light chips demonstrates their potential applications in night vision security, biological imaging, and nondestructive testing.
中文翻译：
适用于多种 PC-LED 应用的高效且热稳定的宽带近红外发射石榴石 Ca3Sc2Ge3O12:Cr3+、Ce3+ 荧光粉
随着近红外（NIR）光谱在安防、农业、医疗等领域的应用需求不断增加，人们一直在寻求高效、智能的近红外光源。在此，成功合成了Cr 3+掺杂的Ca 3 Sc 2 Ge 3 O 12 (CSGG)宽带近红外荧光粉。在480 nm激发下，CSGG:Cr 3+的发射峰位于785 nm，半峰全宽(FWHM)为106 nm。低光致发光光谱（7 K 和 77 K）支持来自分别占据 ScO 6和 CaO 8位点的两个 Cr 3+发光中心的宽带近红外发射。CSGG：铬3+表现出优异的热稳定性（100 °C 时为 97%）和低内量子效率（IQE = 22%）。Ce 3+的引入导致IQE从22%提高到61%，这是由于以下两个原因：从Ce 3+到Cr 3+的能量转移以及改善Cr 3+宇称禁戒跃迁的晶格畸变。。从热活化能、Huang-Rhys因子和热电离效应三个角度揭示了优异的发光热稳定性的机理。受益于CSGG的优异性能：Cr 3+ ,Ce 3+近红外荧光粉与蓝光芯片的结合展示了其在夜视安全、生物成像和无损检测方面的潜在应用。
更新日期：2023-06-02
中文翻译：
适用于多种 PC-LED 应用的高效且热稳定的宽带近红外发射石榴石 Ca3Sc2Ge3O12:Cr3+、Ce3+ 荧光粉
随着近红外（NIR）光谱在安防、农业、医疗等领域的应用需求不断增加，人们一直在寻求高效、智能的近红外光源。在此，成功合成了Cr 3+掺杂的Ca 3 Sc 2 Ge 3 O 12 (CSGG)宽带近红外荧光粉。在480 nm激发下，CSGG:Cr 3+的发射峰位于785 nm，半峰全宽(FWHM)为106 nm。低光致发光光谱（7 K 和 77 K）支持来自分别占据 ScO 6和 CaO 8位点的两个 Cr 3+发光中心的宽带近红外发射。CSGG：铬3+表现出优异的热稳定性（100 °C 时为 97%）和低内量子效率（IQE = 22%）。Ce 3+的引入导致IQE从22%提高到61%，这是由于以下两个原因：从Ce 3+到Cr 3+的能量转移以及改善Cr 3+宇称禁戒跃迁的晶格畸变。。从热活化能、Huang-Rhys因子和热电离效应三个角度揭示了优异的发光热稳定性的机理。受益于CSGG的优异性能：Cr 3+ ,Ce 3+近红外荧光粉与蓝光芯片的结合展示了其在夜视安全、生物成像和无损检测方面的潜在应用。
京公网安备 11010802027423号