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Dy3+-doped LaInO3: a host-sensitized white luminescence phosphor with exciton-mediated energy transfer
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2021-08-17 , DOI: 10.1039/d1tc01317c Tao Hu 1 , Lei Xia 1 , Wen Liu 1 , Jiyang Xie 1 , Zuimin Jiang 2 , Fei Xiong 1, 2 , Wanbiao Hu 1
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2021-08-17 , DOI: 10.1039/d1tc01317c Tao Hu 1 , Lei Xia 1 , Wen Liu 1 , Jiyang Xie 1 , Zuimin Jiang 2 , Fei Xiong 1, 2 , Wanbiao Hu 1
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Host-sensitized rare-earth-ion lighting has emerged as a promising route to realize single-phase white-light emission due to effectively overcoming the self-absorption problems within multiple phosphors. However, the involved energy transfer mechanism that refers to the kinetic processes of host-sensitized excitation and the complex interactions between excitons and activators are far beyond understood. Here, a single-phase white-light-emitting phosphor, Dy3+ doped LaInO3 (Dy-LIO), is explored through tuning the exciton behaviors and host-sensitized emission. As phosphors are excited through the interband transiton, the LIO host presents a broadband blue emission due to the recombination of self-trapped excitons (STEs), and Dy3+ ions acquire the excitation energy by grabbing STEs for lighting. Dy3+ doping reduces the InO6 octahedron distortion and meanwhile releases excitons, which in turn are captured by Dy3+ activators for energy transfer. Thus, dopant Dy3+ emits effective blue and yellow luminescence. In addition, the combined action of the undermined STE emission and the promoted Dy3+ luminescence generates a warm-white-light, which exihibits excellent thermal stability. The results reveal the exciton-mediated energy transfer processes from host (LIO) to activators (Dy3+) in Dy-LIO, with the energy transfer efficiency obtained as high as 77.2%. These findings build up a clear energy transfer mechanism between excitons and activators and further suggests a promising way to explore single-phase white-light-emitting phosphors.
中文翻译：
Dy3+ 掺杂的 LaInO3：一种具有激子介导的能量转移的主体敏化白色发光磷光体
由于有效地克服了多种荧光粉中的自吸收问题，宿主敏化稀土离子照明已成为实现单相白光发射的有希望的途径。然而，涉及宿主敏化激发动力学过程的能量转移机制以及激子和激活剂之间复杂的相互作用远远超出了人们的理解。在这里，通过调节激子行为和主体敏化发射，探索了一种单相白光发射荧光粉，Dy 3+掺杂的 LaInO 3 (Dy-LIO)。当磷光体通过带间跃迁激发时，由于自陷激子 (STE) 和 Dy 3+的复合，LIO 主体呈现宽带蓝色发射离子通过抓住 STE 来获得激发能量以进行照明。Dy 3+掺杂降低了 InO 6八面体畸变，同时释放了激子，激子又被 Dy 3+活化剂捕获以进行能量转移。因此，掺杂剂 Dy 3+发出有效的蓝色和黄色发光。此外，受破坏的 STE 发射和促进的 Dy 3+发光的共同作用产生暖白光，其表现出优异的热稳定性。结果揭示了激子介导的能量从宿主 (LIO) 到活化剂 (Dy 3+) 在 Dy-LIO 中，获得的能量传输效率高达 77.2%。这些发现在激子和活化剂之间建立了清晰的能量转移机制，并进一步提出了一种探索单相白光荧光粉的有前途的方法。
更新日期：2021-09-07
中文翻译：
Dy3+ 掺杂的 LaInO3：一种具有激子介导的能量转移的主体敏化白色发光磷光体
由于有效地克服了多种荧光粉中的自吸收问题，宿主敏化稀土离子照明已成为实现单相白光发射的有希望的途径。然而，涉及宿主敏化激发动力学过程的能量转移机制以及激子和激活剂之间复杂的相互作用远远超出了人们的理解。在这里，通过调节激子行为和主体敏化发射，探索了一种单相白光发射荧光粉，Dy 3+掺杂的 LaInO 3 (Dy-LIO)。当磷光体通过带间跃迁激发时，由于自陷激子 (STE) 和 Dy 3+的复合，LIO 主体呈现宽带蓝色发射离子通过抓住 STE 来获得激发能量以进行照明。Dy 3+掺杂降低了 InO 6八面体畸变，同时释放了激子，激子又被 Dy 3+活化剂捕获以进行能量转移。因此，掺杂剂 Dy 3+发出有效的蓝色和黄色发光。此外，受破坏的 STE 发射和促进的 Dy 3+发光的共同作用产生暖白光，其表现出优异的热稳定性。结果揭示了激子介导的能量从宿主 (LIO) 到活化剂 (Dy 3+) 在 Dy-LIO 中，获得的能量传输效率高达 77.2%。这些发现在激子和活化剂之间建立了清晰的能量转移机制，并进一步提出了一种探索单相白光荧光粉的有前途的方法。
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