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Ba_(3)Bi_(2)(PO_(4))_(4)∶Tb^(3+)荧光粉的制备与性能研究
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作者 崔瑞瑞 陈倩 +1 位作者 张鑫 邓朝勇 《人工晶体学报》 CAS 北大核心 2022年第6期1069-1075,共7页
利用高温固相反应法制备出Ba_(3)Bi_(2-x)(PO_(4))_(4)∶xTb^(3+)(x=0.05,0.1,0.15,0.3,0.4,0.5)绿色荧光粉。通过X射线衍射仪、扫描电子显微镜、积分球式分光光度计和荧光光谱仪等对样品进行了分析。结果表明,所制备的样品均为Ba_(3)Bi... 利用高温固相反应法制备出Ba_(3)Bi_(2-x)(PO_(4))_(4)∶xTb^(3+)(x=0.05,0.1,0.15,0.3,0.4,0.5)绿色荧光粉。通过X射线衍射仪、扫描电子显微镜、积分球式分光光度计和荧光光谱仪等对样品进行了分析。结果表明,所制备的样品均为Ba_(3)Bi_(2)(PO_(4))_(4)纯相,Ba_(3)Bi_(1.7)(PO_(4))_(4)∶0.3Tb^(3+)的带隙估计值为4.21 eV。当激发光的波长为377 nm时,样品的发射光谱的波峰位于543 nm、584 nm和619 nm处,分别对应于Tb^(3+)的^(5)D_(4)→^(7)F_(5)、^(5)D_(4)→^(7)F_(4)和^(5)D_(4)→^(7)F_(3)的能级跃迁。随着Tb^(3+)掺杂浓度的增加,样品的发光强度先增强后减弱,当x=0.3时,发光强度最大。计算表明最近邻离子在Ba_(3)Bi_(2-x)(PO_(4))_(4)∶xTb^(3+)荧光粉的浓度猝灭中起主要作用。随着测试温度的升高,发光强度变化不大,表明样品具有优异的热稳定性能。CIE色坐标图表明所制备的样品可以被紫外光有效激发而发出绿光。 展开更多
关键词 ba_(3)bi_(2-x)(po_(4))_(4)∶xTb^(3+) 绿
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Photoluminescence properties and energy transfer of novel orange–red emitting phosphors:Ba_(3)Bi_(2)(PO_(4))_(4):Sm^(3+),Eu^(3+) for white light-emitting diodes 被引量:3
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作者 Rui-Rui Cui Xiang Guo +1 位作者 Xin-Yong Gong Chao-Yong Deng 《Rare Metals》 SCIE EI CAS CSCD 2021年第10期2882-2891,共10页
Sm^(3+), Eu^(3+)co-coped Ba_(3)Bi_(2)(PO_(4))_(4) phosphors,as potential phosphors for white light-emitting diode applications, were synthesized through the solid-state reaction method for the first time. The crystal ... Sm^(3+), Eu^(3+)co-coped Ba_(3)Bi_(2)(PO_(4))_(4) phosphors,as potential phosphors for white light-emitting diode applications, were synthesized through the solid-state reaction method for the first time. The crystal structure,absorption spectra, photoluminescence properties, decay time, energy transfer mechanism, temperature-dependent properties, and Commission International De L’Eclairage(CIE) chromaticity coordinates were investigated systematically. The pure eulytite-type Ba_(3)Bi_(2)(PO_(4))_(4) phase was obtained after heating at 980 ℃ for 5 h. A notably enhanced absorption efficiency at 393 nm was observed when Sm^(3+), as a sensitizer, was doped into Ba_(3)Bi_(1.82)(PO_(4))_(4): 0.18 Eu^(3+)and the band gap of the Ba_(3)Bi_(2)(PO_(4))_(4) host was estimated to be 4.19 eV. The emission intensity of Ba_(3)Bi_(1.82)(PO_(4))_(4): 0.18 Eu^(3+)was significantly enhanced when Sm^(3+)was co-doped. The existence and mechanism of energy transfer from Sm^(3+) to Eu^(3+)were evaluated by photoluminescence spectra and decay time measurements. The CIE chromaticity coordinate of Ba3 Bi1.75(PO4)4: 0.07 Sm^(3+), 0.18 Eu^(3+) phosphor was calculated to be(0.5746, 0.4197), respectively. 展开更多
关键词 ba_(3)bi_(2)(po_(4))_(4):Sm^(3+) Eu^(3+) PHOSPHORS Photoluminescence Energy transfer
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Preparation of 1-amidoalkyl-2-naphthol derivatives using barium phosphate nano-powders 被引量:1
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作者 Hadi Taghrir Majid Ghashang Mohammad Najafi Biregan 《Chinese Chemical Letters》 SCIE CAS CSCD 2016年第1期119-126,共8页
Barium phosphate(Ba_3(PO_4)_2) nano-powder was successfully synthesized via a simple precipitation route without any surfactant. The prepared nano-powder was applied for the facile synthesis of 1-amidoalkyl-2-naph... Barium phosphate(Ba_3(PO_4)_2) nano-powder was successfully synthesized via a simple precipitation route without any surfactant. The prepared nano-powder was applied for the facile synthesis of 1-amidoalkyl-2-naphthol derivatives using multi-component reaction of aldehydes, 2-naphthol and an amide(or urea) in high yields. 展开更多
关键词 Multi-component reaction 1-Amidoalkyl-2-naphthol barium phosphate(ba_3po_4)_2) 2-Hydroxydibenzofuran
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