Surface Vibration‐Mediated and Multiphonon Relaxation‐Assisted Antithermal‐Quenching Shortwave Infrared Emission in Ho‐Based Double Perovskite With Long Lifetime,Laser & Photonics Reviews

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Surface Vibration‐Mediated and Multiphonon Relaxation‐Assisted Antithermal‐Quenching Shortwave Infrared Emission in Ho‐Based Double Perovskite With Long Lifetime
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2024-09-09 , DOI: 10.1002/lpor.202401034
Qiudong Duan _{1,

2,

3} , Yu Zha _{1,

2,

3} , Yusheng Xu _{1,

2,

3} , Yougui Yang _{1,

2,

3} , Tianyu Guo _{1,

2,

3} , Fanju Meng _{1,

2,

3} , Yuting Wu _{1,

2,

3} , Dongfeng Hong _{1,

2,

3} , Jin Han _{1,

2,

3} , Yong Yang _{1,

2,

3} , Qi Wang _{1,

2,

3} , Dacheng Zhou _{1,

2,

3} , Ming Wen ₄ , Yugeng Wen _{1,

2,

3} , Jianbei Qiu _{1,

2,

3}

Affiliation

Thermal quenching generally predominates in Er3+ 1540 nm luminescence quenching at elevated temperatures, due to intensified lattice vibration and efficient overtone vibrational relaxation by O─H stretch. This issue impedes practical device applications of shortwave infrared Er‐doped phosphors. Herein, with the mediation of surface vibrational phonons, anti‐thermal quenching of Er3+ 1540 nm emission is reported in (220)‐dominated Er3+‐doped Cs2NaHoCl6 double perovskite. The downshifting emissions can be boosted with rising temperatures from 303 to 543 K, reaching 225%@483 K of the initial intensity at 303 K, accompanied with a long lifetime of 33.02 ms at 483 K. By combining temperature‐dependent in situ Raman and Fourier transform infrared spectroscopies with the excited‐state dynamics results, the coordination role of water molecules is verified, serving as promoters instead of quenchers on the (220) facet at high temperatures. Furthermore, efficient energy transfer from Ho3+ to Er3+ enables intense 1540 nm emission with a photoluminescence quantum yield of 78.1% under 450 nm excitation. Finally, a compact thermally stable phosphor‐converted light‐emitting diode (LED) is designed as a narrowband shortwave infrared light source with a blue LED chip. This work pushes the improved understanding of achieving thermal‐enhanced Er3+ luminescence for potential broad applications.

中文翻译：

长寿命Ho基双钙钛矿的表面振动介导和多声子弛豫辅助抗热淬火短波红外发射

高温下 Er3+ 1540 nm 发光猝灭通常以热猝灭为主，这是由于 O─H 拉伸导致的晶格振动增强和有效的泛音振动弛豫。这个问题阻碍了短波红外掺铒荧光粉的实际应用。在此，在表面振动声子的介导下，在(220)为主的Er3+掺杂Cs2NaHoCl6双钙钛矿中报道了Er3+ 1540 nm发射的反热猝灭。随着温度从 303 K 上升到 543 K，降档发射可以增强，在 303 K 时达到初始强度的 225%@483 K，同时在 483 K 时具有 33.02 ms 的长寿命。傅里叶变换红外光谱与激发态动力学结果验证了水分子的配位作用，在高温下在（220）面上充当促进剂而不是猝灭剂。此外，从Ho3+到Er3+的有效能量转移可实现强烈的1540 nm发射，在450 nm激发下光致发光量子产率为78.1%。最后，设计了一种紧凑型热稳定磷光体转换发光二极管（LED）作为带有蓝色 LED 芯片的窄带短波红外光源。这项工作推动了人们对实现热增强 Er3+ 发光的理解，以实现潜在的广泛应用。

更新日期：2024-09-09

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