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Stable color-tunable Ca3Y(GaO)3(BO3)4:Bi3+/Tb3+/Eu3+ phosphors for application in n-UV-pumped wLEDs
Dalton Transactions ( IF 3.5 ) Pub Date : 2024-01-31 , DOI: 10.1039/d3dt04264b
P J Xia 1 , X Z Zheng 1 , L Yue 1 , Y F Lei 2 , M Xu 1 , W B Dai 1, 3
Dalton Transactions ( IF 3.5 ) Pub Date : 2024-01-31 , DOI: 10.1039/d3dt04264b
P J Xia 1 , X Z Zheng 1 , L Yue 1 , Y F Lei 2 , M Xu 1 , W B Dai 1, 3
Affiliation
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For further development of light sources, white light-emitting diodes (wLEDs) have attracted widespread attention as promising next-generation light sources fabricated via the combination of phosphors and LED chips. However, latent defects, such as chemical/thermal instability, low color rendering index (CRI) and high correlated color temperature (CCT), of current mainstream wLEDs seriously hinder their further large-scale implementation. Herein, in order to overcome these limitations, single-phase color-tunable gaudefroyite (Ca3Y(GaO)3(BO3)4 (CYGB)) tridoped with Bi3+/Tb3+/Eu3+ ions was synthesized for the first time and detailed characterisation was performed via high-temperature solid-state reaction and structural/spectral analyses, respectively. Radius difference percentage calculations and Rietveld refinements indicate that dopants occupy both Y3+ and Ca2+ sites but preferably the Y3+ site over the Ca2+ site due to the same valence state. Through subtly regulating the (co)doping contents and skillfully utilizing the energy transfer (ET) strategy from the allowed transition of blue light-emitting Bi to the forbidden transition of green/red light-emitting Tb/Eu, the color hue (including white light) of highly efficient PL can be easily tuned according to the need. Meanwhile, composition/content-optimized white light-emitting CYGB:2%Bi/10%Tb/12%Eu also shows splendid chemical/thermal stability. Finally, as a proof-of-concept experiment, the CYGB:2%Bi/10%Tb/12%Eu phosphor-converted wLED (pc-wLED) was fabricated and encapsulated via the up-to-date remote ‘capping’ method, which imparted attractive performances. Altogether, the stable CYGB:Bi/Tb/Eu phosphor is a promising candidate for application in lighting/display fields.
中文翻译：
用于 n-UV 泵浦 wLED 的稳定颜色可调 Ca3Y(GaO)3(BO3)4:Bi3+/Tb3+/Eu3+ 荧光粉
为了进一步发展光源，白光发光二极管（ w LED）作为通过荧光粉和 LED 芯片组合制造的有前途的下一代光源而引起了广泛的关注。然而，目前主流白光LED的化学/热不稳定、显色指数(CRI)低和相关色温(CCT)高等潜在缺陷严重阻碍了其进一步大规模推广。在此，为了克服这些限制，合成了三掺杂Bi 3+ /Tb 3+ /Eu 3+离子的单相颜色可调的钙铁矿（Ca 3 Y(GaO) 3 (BO 3 ) 4 (CYGB)）分别通过高温固态反应和结构/光谱分析进行了首次详细表征。半径差百分比计算和Rietveld精修表明，掺杂剂占据Y 3+和Ca 2+位点，但由于相同的价态，优选Y 3+位点占据Ca 2+位点。通过巧妙地调控（共）掺杂含量，巧妙利用从蓝光Bi的允许跃迁到绿/红光Tb/Eu的禁戒跃迁的能量转移（ET）策略，颜色色调（包括白色）高效PL的光）可以根据需要轻松调整。 同时，成分/含量优化的白光CYGB:2%Bi/10%Tb/12%Eu也表现出优异的化学/热稳定性。最后，作为概念验证实验，通过最新的远程“封盖”制造并封装了 CYGB:2%Bi/10%Tb/12%Eu 磷光体转换w LED (pc- w LED) ”方法，赋予了有吸引力的性能。总而言之，稳定的 CYGB:Bi/Tb/Eu 荧光粉是照明/显示领域应用的有前景的候选者。
更新日期：2024-01-31
中文翻译：
用于 n-UV 泵浦 wLED 的稳定颜色可调 Ca3Y(GaO)3(BO3)4:Bi3+/Tb3+/Eu3+ 荧光粉
为了进一步发展光源，白光发光二极管（ w LED）作为通过荧光粉和 LED 芯片组合制造的有前途的下一代光源而引起了广泛的关注。然而，目前主流白光LED的化学/热不稳定、显色指数(CRI)低和相关色温(CCT)高等潜在缺陷严重阻碍了其进一步大规模推广。在此，为了克服这些限制，合成了三掺杂Bi 3+ /Tb 3+ /Eu 3+离子的单相颜色可调的钙铁矿（Ca 3 Y(GaO) 3 (BO 3 ) 4 (CYGB)）分别通过高温固态反应和结构/光谱分析进行了首次详细表征。半径差百分比计算和Rietveld精修表明，掺杂剂占据Y 3+和Ca 2+位点，但由于相同的价态，优选Y 3+位点占据Ca 2+位点。通过巧妙地调控（共）掺杂含量，巧妙利用从蓝光Bi的允许跃迁到绿/红光Tb/Eu的禁戒跃迁的能量转移（ET）策略，颜色色调（包括白色）高效PL的光）可以根据需要轻松调整。 同时，成分/含量优化的白光CYGB:2%Bi/10%Tb/12%Eu也表现出优异的化学/热稳定性。最后，作为概念验证实验，通过最新的远程“封盖”制造并封装了 CYGB:2%Bi/10%Tb/12%Eu 磷光体转换w LED (pc- w LED) ”方法，赋予了有吸引力的性能。总而言之，稳定的 CYGB:Bi/Tb/Eu 荧光粉是照明/显示领域应用的有前景的候选者。
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