无机材料学报 ›› 2020, Vol. 35 ›› Issue (8): 847-856.DOI: 10.15541/jim20190554
所属专题: 功能材料论文精选(二):发光材料
• 综述 • 下一篇
姬海鹏1(),张宗涛1,XU Jian2,TANABE Setsuhisa2,陈德良1(
),解荣军3(
)
收稿日期:
2019-10-31
修回日期:
2019-11-20
出版日期:
2020-08-20
网络出版日期:
2020-03-06
作者简介:
姬海鹏(1989-), 男, 讲师. E-mail: <email>jihp@zzu.edu.cn</email><br/>JI Haipeng (1989–), male, lecturer. E-mail: <email>jihp@zzu.edu.cn</email>
基金资助:
JI Haipeng1(),ZHANG Zongtao1,XU Jian2,TANABE Setsuhisa2,CHEN Deliang1(
),XIE Rongjun3(
)
Received:
2019-10-31
Revised:
2019-11-20
Published:
2020-08-20
Online:
2020-03-06
Supported by:
摘要:
稳定可靠的高光子能量发光(620~650 nm)红光荧光粉, 对于构建低色温、高显指荧光粉转换型白光发光二极管(WLED)至关重要。Mn 4+激活红光荧光粉是当前WLED用荧光粉研究热点之一。本文介绍了Mn 4+离子的能级跃迁与光致发光特性, 详细叙述了目前所报道的七种Mn 4+激活含d 0/d 10/s 0离子氧氟化物系列红色荧光粉(如Na2WO2F4:Mn 4+等)的制备方法、晶体结构及其发光特性。目前Mn 4+在氧氟化物结构中得到强R线发光的情况少, 微观配位体仍是[MnF6]或[MnO6], 其化学稳定性和量子效率研究也很缺乏。最后对Mn 4+激活氧氟化物红光荧光粉的研究进行了展望。
中图分类号:
姬海鹏, 张宗涛, XU Jian, TANABE Setsuhisa, 陈德良, 解荣军. Mn4+激活氧氟化物红光荧光粉的研究进展[J]. 无机材料学报, 2020, 35(8): 847-856.
JI Haipeng, ZHANG Zongtao, XU Jian, TANABE Setsuhisa, CHEN Deliang, XIE Rongjun. Advance in Red-emitting Mn4+-activated Oxyfluoride Phosphors[J]. Journal of Inorganic Materials, 2020, 35(8): 847-856.
图1 d3离子的自由离子能级(C = 4.5B) (a), 描述d3离子在八面体晶体场中能级劈裂的Tanabe-Sugano图(C = 4.5B) (b), 八面体晶体场中五种d轨道相对于配体的取向(黑点表示配体离子)(c)和d轨道在八面体晶体场中的晶体场劈裂(d)[16]
Fig. 1 Energy levels arising from a d3 configuration for a free transition metal ion (C=4.5B) (a), Tanabe-Sugano diagram for the d3 electron configuration in an octahedral crystal field (C=4.5B) (b), orientation of the five d-orbitals with respect to the ligands of an octahedral complex (black dots showing the ligands around the transition metal ion) (c), and crystal field splitting for the d-orbitals in an octahedral crystal field (d)[16]
图2 规则八面体配位和畸变八面体配位
Fig. 2 Regular octahedron coordination and distorted octahedra coordination (a) Point symmetry of Oh; (b) Central cation shifting to a vertex, C4v; (c) Central cation shifting to an edge, C2v; (d) Central cation shifting to a face, C3v
Cation | Phosphor host | Peaking wavelength/nm | (R-line/ν6 intensity ratio)/% | T50%/K | Ref. |
---|---|---|---|---|---|
d0 | Na2WO2F4 | 619 | 125 | 340 | [21-22] |
Cs2WO2F4 | 632 | 5 | 350 | [23] | |
Cs2NbOF5 | 632 | 10 | - | [24-25] | |
BaNbOF5 | 629 | 10 | - | [26] | |
Sr2ScO3F | 690 | - | 320 | [27] | |
BaTiOF4 | 632 | 5 | - | [28] | |
d10 | Mg28Ge7.55O32F15.04 | 657 | - | 700 | [29] |
s0 | LiAl4O6F | 662 | 5-10 | - | [30] |
表1 目前所报道的Mn4+激活氧氟化物荧光粉
Table 1 The reported Mn4+ activated oxyfluoride phosphors
Cation | Phosphor host | Peaking wavelength/nm | (R-line/ν6 intensity ratio)/% | T50%/K | Ref. |
---|---|---|---|---|---|
d0 | Na2WO2F4 | 619 | 125 | 340 | [21-22] |
Cs2WO2F4 | 632 | 5 | 350 | [23] | |
Cs2NbOF5 | 632 | 10 | - | [24-25] | |
BaNbOF5 | 629 | 10 | - | [26] | |
Sr2ScO3F | 690 | - | 320 | [27] | |
BaTiOF4 | 632 | 5 | - | [28] | |
d10 | Mg28Ge7.55O32F15.04 | 657 | - | 700 | [29] |
s0 | LiAl4O6F | 662 | 5-10 | - | [30] |
图3 Na2WO2F4的晶胞(a), 具有较大畸变的[WO2F4]八面体(b)和Na2WO2F4:Mn4+的发光光谱(c)(插图为其在460 nm激发下照片)[21]
Fig. 3 Unit cell of Na2WO2F4 (a), highly-distorted [WO2F4] octahedra (b), and emission spectrum of Na2WO2F4:Mn4+ (c) [21] with inset showing phosphor image under 460 nm light Na: yellow; W: blue; O: red; F: gray
图4 (a) Cs2WO2F4的晶体结构, 其含有具有较小畸变的W(O,F)6配位八面体, 右下所示为Mn4+在K2MnF6中的微观配位八面体; (b) Cs2WO2F4:Mn4+的激发与发射光谱(插图为其在365 nm激发下照片)[23]
Fig. 4 (a) Unit cell of Cs2WO2F4 which contains slightly- distorted [W(O,F)6] octahedra, with the bottom-right showing the local coordination of Mn4+ in K2MnF6; (b) Excitation and emission spectra of Cs2WO2F4:Mn4+ with inset showing the phosphor image under 365 nm light[23]
图5 Cs2NbOF5:Mn4+的激发光谱(PLE)与漫反射光谱(DRS) (a)和Cs2NbOF5:Mn4+的变温发光光谱(b)[24]
Fig. 5 PLE and DRS spectra of the Cs2NbOF5:Mn4+ phosphor (a) and temperature-dependent emission spectra of Cs2NbOF5:Mn4+ (b)[24] with the inset showing the intensity evolution of the integrated emission (Ie), the stokes emission (Is) and the anti-stokes emmission (Ia)
图6 T=78和298 K时BaNbOF5:Mn4+的激发光谱(a)与发光光谱(b) (插图为该荧光粉在自然光和紫外光照射下照片)[26]
Fig. 6 The PLE (a) and PL (b) spectra of the BaNbOF5:Mn4+ phosphor at temperature of 78 and 298 K with insets showing the phosphor images under natural or UV light[26]
图7 Sr2ScO3F的晶胞(a)和Sr2ScO3F:Mn4+的变温发光光谱(b)[27]
Fig. 7 Unit cell of Sr2ScO3F (a) and temperature-dependent emission spectra of Sr2ScO3F:Mn4+ (b)[27]Sr: yellow; Sc: blue; O: red; F: gray
图8 BaTiOF4:Mn4+的室温激发与发射光谱(a), BaTiOF4:Mn4+的室温和低温发光光谱(b), BaTiOF4的晶胞(c)和[Ti2OF4]畸变八面体(d)[28]
Fig. 8 Excitation and emission spectra of BaTiOF4:Mn4+ at room temperature (a), emission spectra of BaTiOF4:Mn4+ at 77 K and 293 K (b), unit cell of BaTiOF4 (c), and distorted octahedron coordination of [Ti2OF4] (d)[28]Ba: yellow; Ti: blue; O: red; F: gray
图9 Mn4+占据Mg28Ge7.55O32F15.04结构中八面体配位Ge/Mg格位时计算所得4T2g和4T1g能级位置与实测光谱的比较[29]
Fig. 9 Comparison of the calculated Mn4+ energy levels in Mg28Ge7.55O32F15.04 for all possible Mn4+ positions in Ge/Mg sites with the measured spectrum[29]
图10 LiAl4O6F的晶胞及Al3+/Li+的配位多面体(a)和LiAl4O6F:Mn4+的变温发光光谱(b)[30]
Fig. 10 Unit cell of LiAl4O6F and coordination of Al3+/Li+ (a) and emission spectra of LiAl4O6F:Mn4+ at temperature of 298-523 K (b) [30]
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