JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Yinhua Wang,Songchao Bai,Hao Liang,Chao Li,Tianya Tan,Gang Yang,Jiwei Wang
Lead-free double perovskites have become the research hotspot in the optoelectronic fields. Then, it is a challenge to utilize the lattice doping by different rare earth ions with rich energy level and unique luminescence for emerging photonic applications. Here, we successfully prepared Sb 3+ and Ln 3+ ions doped Cs 2 NaYCl 6 single crystals (SCs), bringing tunable bright luminescent emissions of blue, red, and white light, the highest photoluminescence quantum yield (PLQY) is up to 58.33%. Based on excellent and tunable luminescent properties, the multicolor light-emitting diodes (LEDs) applications for the rare earth-based double perovskite SCs were designed. These findings indicate that rare earth-based double perovskite will provide a broader application space for lighting.
研究领域:
光电
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材料科学
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光子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2024
·
IF 3.3
Dengbang Zhao,Ying Liu,Yanbing Han,Xu Chen,Mochen Jia,Jibin Zhang,Linyuan Lian,Di Wu,Xinjian Li,Zhifeng Shi
Design of stable white-light emitting materials based on the emerging lead-free metal halide colloidal nanocrystals is in urgent demand for lighting technology innovation. Herein, we developed a facile hot-injection method and optimize the synthesis conditions to prepare Sb 3+ doped Cs 2 ZrCl 6 nanocrystals with good uniformity and crystallinity. Sb 3+ ions were doped into the Cs 2 ZrCl 6 lattice and proved to occupy the sites of Zr 4+ ions, generating additional absorption bands at lower energy and new emission band centered at 620 nm apart from the absorption and emission from the host. The emission at 620 nm from Sb 3+ ions could be prompted by an energy transfer process between the host STEs and Sb 3+ ions. Moreover, benefiting from two broad emission bands from singlet and triplet states of Sb 3+ ions in Cs 2 ZrCl 6 nanocrystals, we obtained tunable white-light-emitting nanocrystals by adjusting the dopant concentration. Our study provides a reliable method to design efficient single-emitter-based white-light emitting metal halide nanocrystals and promote their development in the field of lighting and displays.
研究领域:
材料科学
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纳米技术
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光电子学
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照明技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Xiaowei Deng,Shanshan Cheng,Xu Chen,Meng Wang,Xu Li,Gaoqiang Li,Dongyang Zhu,Mochen Jia,Xinjian Li,Zhifeng Shi
Lead-free perovskite is a non-toxic and environmentally friendly material, which plays an increasingly significant role in photodetection, luminescence, photovoltaics and so on. In this paper, a single-component white light emission is successfully achieved through the co-doping of Sb 3+ , Mn 2+ and Tb 3+ in Cs 2 NaInCl 6 . The photoluminescent mechanism is proved through the spectra measurements and decay dynamics. The addition of Sb 3+ could activate the self-trapped exciton (STE) emission of the matrix (blue light at 450 nm). The efficient energy transfer from STE emission could realize red light emission of Mn 2+ , and green light emission of Tb 3+ . The single-component white light emission is obtained with the Commission Internationale de L'Eclairage of (0.31, 0.35), high color rendering index of 88.1 and correlated color temperature of 6394 K. Finally, the prepared white light emitting diodes demonstrate high performance and excellent stability. This provides a new idea for development of lead-free perovskite white luminescent materials in display and lighting applications.
研究领域:
材料科学
·
光子学
·
光电
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Dedan Mu,Tianchi Wang,Junheng Yuan,Lulu Han,Hao Song,Shuyi Yao,Bin Meng,Ting Wang,Xuhui Xu
X-ray detection is vital in various fields such as medical imaging, security screening, and materials analysis. However, to meet the diverse detection requirements across different scenarios, current scintillators used for X-ray detection encounter challenges in both immediate and delayed radiation detections. In this work, flexibly controlling trap distribution through extra ions doping into Cs 2 NaTbCl 6 lead-free perovskites presents a promising avenue for addressing these challenges and advancing X-ray dose detection capabilities across diverse scientific domains. By doping Sb 3+ ions into the Cs 2 NaTbCl 6 host, the traps are significantly passivated through improved crystallinity, resulting in the suppression of afterglow behaviors and endowing the high-resolution real-time dynamic X-ray detection. Additionally, the incorporation of Mn 2+ into the Cs 2 NaTbCl 6 matrix causes significant lattice distortion, leading to increased concentrations of both shallow and deep traps, effectively boosting delayed X-ray detection efficiency. This work may provide an effective strategy for constructing efficient scintillators for the realization of multi-environmental X-ray imaging.
研究领域:
材料科学
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放射学
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医学成像
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安全检查
·
材料分析
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）