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Hou H, Zhang S, Wang H, Lin T, Zou B, Zeng R. Temperature-Dependent Photoluminescence from Well-Resolved Excited State Structures in Rare-Earth-Based Double Perovskites. ACS APPLIED MATERIALS & INTERFACES 2024; 16:31332-31340. [PMID: 38832752 DOI: 10.1021/acsami.4c04972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
Lead-free halide double perovskites (DPs) have become a research hotspot in the field of photoelectrons due to their unique optical properties and flexible compositional tuning. However, the reports on the optical properties of DPs primarily concentrate on the room temperature state and only exhibit single emission band. Here, we synthesized Cs2NaYCl6:Sb3+, Dy3+ DPs by a solvothermal method to realize white light emission with photoluminescence (PL) quantum yield as high as 70.7%. The energy-transfer process from self-trapped excitons (STEs) to Dy3+ ions was revealed by optical characterization and theoretical simulation calculations. Interestingly, we observed the double-emission from low-energy STE emission of Sb3+ ions and Dy3+ emission at low temperatures, and the double-emission is consistent with the asymmetric doublet feature of the 3P1 → 1S0 transition split into two minima. The PL spectra further showed that the fluorescence intensity ratios of Dy3+ ions at 580 and 680 nm were strongly temperature-dependent, and the relative sensitivity is up to 1.79% K-1 at 360 K. Moreover, the near-infrared and radiation luminescence properties indicated that the Cs2NaYCl6:Sb3+, Dy3+ DPs also have good prospects for night vision and radiation detection, as well as the great potential for applications in solid-state illumination and optical temperature measurement.
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Affiliation(s)
- Haowen Hou
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Third Generation Semiconductor Industry Research Institute, Guangxi University, Nanning 530004, China
| | - Shuai Zhang
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Third Generation Semiconductor Industry Research Institute, Guangxi University, Nanning 530004, China
| | - Haiyan Wang
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Third Generation Semiconductor Industry Research Institute, Guangxi University, Nanning 530004, China
| | - Tao Lin
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Third Generation Semiconductor Industry Research Institute, Guangxi University, Nanning 530004, China
| | - Bingsuo Zou
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Third Generation Semiconductor Industry Research Institute, Guangxi University, Nanning 530004, China
| | - Ruosheng Zeng
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Third Generation Semiconductor Industry Research Institute, Guangxi University, Nanning 530004, China
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Jiang X, Ding H, Yang F, Luo F, Gan Z, Fan Z, Gao F, Cheng Z, Luo G, Zhou W. Sb 3+/Sm 3+ Codoped Cs 2NaScCl 6 All-Inorganic Double Perovskite: Blue Emission of Self-Trapped Excitons and Red-Emission via Energy Transfer. Inorg Chem 2024; 63:10756-10766. [PMID: 38812065 DOI: 10.1021/acs.inorgchem.4c01339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
The lead-free halide perovskites possess nontoxicity and excellent chemical stability, whereas relatively weak luminescence intensity limits their potential in practical applications. Therefore, strengthening the luminescence intensity and expanding application fields are urgent tasks for the development of lead-free halide perovskites. In this paper, antimony-doped Cs2NaScCl6 crystals synthesized by a solvothermal method emit bright, deep blue photoluminescence at 447 nm. The photoluminescence (PL), photoluminescence excitation (PLE), and absorption spectra demonstrate that Sb3+ doping effectively activate the intrinsic "dark self-trapped exciton (STE)," leading to an impressive photoluminescence quantum yield (PLQY) value of 78.31% for 1% Sb3+ doping. Furthermore, the luminescence intensity remains above 92% compared with the fresh sample without secondary phases detected even after 90 days under environmental conditions. To expand the emission spectra, rare-earth Sm3+ is further incorporated into Cs2NaScCl6:1% Sb3+ crystals. The results show that Sb ions not only enhance intrinsic STE luminescence but also serve as sensitizers to boost the red-light emission of Sm3+, leading to a significant 500-fold increase in red emission intensity. Finally, the PLQY reaches a stunning 86.78%. These findings provide valuable insights in the design of Sb ion-doped lead-free double perovskites, broadening the application fields in various optoelectronic devices.
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Affiliation(s)
- Xunliang Jiang
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
| | - Haoqing Ding
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
| | - Fengxi Yang
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
| | - Fusheng Luo
- School of Physics and Electronic Information, Gannan Normal University, Ganzhou 341000, China
| | - Zhixing Gan
- Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information, School of Artificial Intelligence, Nanjing Normal University, Nanjing 210023, China
| | - Zhiping Fan
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
| | - Fei Gao
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
| | - Zhenzhi Cheng
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
| | - Guangsheng Luo
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
| | - Weiping Zhou
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
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Naresh V, Cha PR, Lee N. Cs 2NaGdCl 6:Tb 3+─A Highly Luminescent Rare-Earth Double Perovskite Scintillator for Low-Dose X-ray Detection and Imaging. ACS APPLIED MATERIALS & INTERFACES 2024; 16:19068-19080. [PMID: 38587167 DOI: 10.1021/acsami.3c17301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Rare-earth-based double perovskite (DP) X-ray scintillators have gained significant importance with low detection limits in medical imaging and radiation detection owing to their high light yield (LY) and remarkable spatial resolution. Herein, we report the synthesis of 3D double perovskite (DP) crystals, namely, Cs2NaGdCl6 and Tb3+-Cs2NaGdCl6 using hydrothermal reaction. Cs2NaGdCl6 DP single crystals exhibited a blue self-trapped exciton (STE) emission at 470 nm under ultraviolet (265 nm) excitation with a photoluminescence quantum yield (PLQY) of 8.4%. Introducing Tb3+ ions into Cs2NaGdCl6 has resulted in quenching of STE emission and enhancing green emission at 549 nm attributed to the 5D4 → 7F5 transition of Tb3+, suggesting efficient energy transfer (ET) from STE to Tb3+. This ET process is evidenced by the appearance of Tb3+ bands in the excitation spectra of the host, the shortening of the STE lifetimes in the presence of Tb3+ ions, and the enhancement of PLQY (72.6%). Furthermore, Cs2NaGdCl6:5%Tb3+ films of various thicknesses (0.1-0.6 mm) were synthesized and their X-ray scintillating performance has been examined. The Cs2NaGdCl6:5%Tb3+ film with 0.4 mm thickness has exhibited an excellent linear response to the X-ray dose rate with a low detection limit of 41.32 nGyair s-1, an LY of 39,100 photons MeV-1, and excellent radiation stability. Benefiting from the strong X-ray excited luminescence (XEL) of Cs2NaGdCl6:5%Tb3+, we developed a Cs2NaGdCl6:5%Tb3+ X-ray scintillator screen with a least thickness (0.1 mm), exhibiting remarkable imaging ability with a spatial resolution of 10.75 lp mm-1. These results suggest that Cs2NaGdCl6:Tb3+ can be a potential candidate for low-dose and X-ray imaging applications.
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Affiliation(s)
- Varnakavi Naresh
- School of Advanced Material Engineering, Kookmin University, Seoul 02707, Republic of Korea
| | - Pil-Ryung Cha
- School of Advanced Material Engineering, Kookmin University, Seoul 02707, Republic of Korea
| | - Nohyun Lee
- School of Advanced Material Engineering, Kookmin University, Seoul 02707, Republic of Korea
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Wang H, Yao J, Zeng R. The luminescence modulation of rare earth-doped/containing lead-free double perovskites toward multifunctional applications: a review. NANOSCALE 2024; 16:6837-6852. [PMID: 38501176 DOI: 10.1039/d3nr06472g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
Lead-free double perovskites (DPs) with superior environmental stability and high defect tolerance have attracted considerable attention and exhibit great promise in photodetectors, solar cells, lighting devices, etc. However, achieving optical modulation and high photoluminescence quantum yield using this kind of material remains a challenge. Rare earth ions feature abundant energy levels and outstanding photophysical properties. Incorporating rare earth ions into lead-free DPs is an effective strategy to improve their optical performances, which have great effects on night-vision and light emitting diodes. Consequently, in this mini-review, we summarize the synthesis methods, optical properties, issues, and multifunctional applications of lead-free DPs described in recent years. The performances of DPs can be modulated via rare earth doping, which involves the extension of luminescence range, the improvement of PLQY, the realization of multi-mode excitation, and the regulation of luminescence color. We hope that this review will provide some insights into luminescence modulation and applications of lead-free DPs.
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Affiliation(s)
- Haiyan Wang
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China.
| | - Jiandong Yao
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China.
| | - Ruosheng Zeng
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China.
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You W, Zhang X, Yu R, Chen C, Li M, Pan G, Mao Y. Highly efficient upconversion luminescence in narrow-bandgap Y 2Mo 4O 15. OPTICS LETTERS 2024; 49:1824-1827. [PMID: 38560874 DOI: 10.1364/ol.519702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 02/28/2024] [Indexed: 04/04/2024]
Abstract
Lanthanide-doped upconversion (UC) materials have been extensively investigated for their unique capability to convert low-energy excitation into high-energy emission. Contrary to previous reports suggesting that efficient UC luminescence (UCL) is exclusively observed in materials with a wide bandgap, we have discovered in this study that Y2Mo4O15:Yb3+/Tm3+ microcrystals, a narrowband material, exhibit highly efficient UC emission. Remarkably, these microcrystals do not display any four- or five-photon UC emission bands. This particular optical phenomenon is independent of the variation in doping ion concentration, temperature, phonon energy, and excitation power density. Combining theoretical calculations and experimental results, we attribute the vanishing emission bands to the strong interaction between the bandgap of the Y2Mo4O15 host matrix (3.37 eV) and the high-energy levels (1I6 and 1D2) of Tm3+ ions. This interaction can effectively catalyze the UC emission process of Tm3+ ions, which leads to Y2Mo4O15:Yb3+/Tm3+ microcrystals possessing very strong UCL intensity. The brightness of these microcrystals outshines commercial UC NaYF4:Yb3+,Er3+ green phosphors by a factor of 10 and is 1.4 times greater than that of UC NaYF4:Yb3+,Tm3+ blue phosphors. Ultimately, Y2Mo4O15:Yb3+/Tm3+ microcrystals, with their distinctive optical characteristics, are being tailored for sophisticated anti-counterfeiting and information encryption applications.
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Zhang W, Chen G, Lu X, Wang Y, Zhang N, Zhang Q, Liu X, Tang X. Unveiling Sb 3+ Doping and Tricolor Luminescence from Intrinsic Self-Trapped Excitons in Cs 2ZnCl 4 Crystals. J Phys Chem Lett 2024; 15:2616-2623. [PMID: 38420941 DOI: 10.1021/acs.jpclett.4c00090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Zero-dimensional (0D) lead-free halide perovskites have lately received significant interest owing to their captivating broadband emissions. An in-depth understanding of the luminescence mechanism of self-trapped excitons (STEs) and realization of effective regulation of luminescence properties have become a major challenge in the research of lead-free metal halides. Herein, we have synthesized the Cs2ZnCl4 and Sb3+-doped Cs2ZnCl4 crystals and conducted a comprehensive investigation into their distinct electronic structures and optical characteristics. The findings from both experimental and theoretical investigations indicate that the tricolor luminescence in Cs2ZnCl4 and blue emission in Sb3+-doped Cs2ZnCl4 stem from intrinsic STEs, and the near-infrared emission originates from extrinsic STEs associated with the Sb3+ ion in Sb3+-doped Cs2ZnCl4. Sb3+ doping increases the quantum yield of Cs2ZnCl4 to a large extent. In addition, intersystem crossing, exciton self-trapping, and lattice relaxation are the main reasons for the large Stokes shift. The present study is expected to provide a novel perspective for researchers in comprehending the luminescent mechanism of STEs and advancing the utilization of 0D lead-free metal halides in optoelectronic applications.
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Affiliation(s)
- Wenxia Zhang
- School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, People's Republic of China
| | - Guanghao Chen
- School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, People's Republic of China
| | - Xianghua Lu
- BOE HC SemiTek Corporation, Yiwu, Zhejiang 322009, People's Republic of China
| | - Yuchan Wang
- Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Integrated Circuit Science and Engineering, Tianjin University of Technology, Tianjin 300384, People's Republic of China
| | - Nan Zhang
- School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, People's Republic of China
| | - Qian Zhang
- School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, People's Republic of China
| | - Xiaoyu Liu
- Innovation Laboratory of Terahertz Biophysics, National Innovation Institute of Defense Technology, Beijing 100071, People's Republic of China
| | - Xiaosheng Tang
- School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, People's Republic of China
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Qin Q, Liu Y, Gao G, Chen Z, Gao Z, Chen L, Zhong X, Zou B. Tunable dual-emission of Sb 3+, Ho 3+Co-doped Cs 2NaScCl 6single crystals for light-emitting diodes. NANOTECHNOLOGY 2023; 35:115203. [PMID: 38086072 DOI: 10.1088/1361-6528/ad14b2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 12/11/2023] [Indexed: 12/30/2023]
Abstract
Lead-free halide double perovskites are considered as one of the most promising materials in optoelectronic devices, such as solar cells, photodetectors, and light-emitting diodes (LEDs), due to their environmental friendliness and chemical stability. However, the extremely low photoluminescence quantum yield (PLQY) of self-trapped excitons (STEs) emission from lead-free halide double perovskites impedes their applications. Herein, Sb3+ions were doped into rare-earth-based double perovskite Cs2NaScCl6single crystals (SCs), resulting in a large enhancement of PLQY from 12.57% to 87.37%. Moreover, by co-doping Sb3+and Ho3+into Cs2NaScCl6SCs, the emission color can be tuned from blue to red, due to an efficient energy transfer from STEs to Ho3+ions. Finally, the synthesized sample was used in multicolor LED, which exhibited excellent stability and optical properties. This work not only provides a new strategy for improving the optical properties of Cs2NaScCl6SCs, but also suggests its potential application in multicolor LEDs.
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Affiliation(s)
- Qingyong Qin
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
| | - Yu Liu
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
| | - Ge Gao
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
| | - Zhaoqiong Chen
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
| | - Zejiang Gao
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
| | - Li Chen
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
| | - Xianci Zhong
- School of Civil Engineering and Architecture, Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning 530004, People's Republic of China
| | - Bingsuo Zou
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
- School of Resources, Environments and Materials, Guangxi University, Nanning 530004, People's Republic of China
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Yang G, Bai S, Li X, Liang H, Li C, Sun J, Wang Y, Huang J, Pan G, Zhu Y. Tunable and Efficient Photoluminescence of Lanthanide-Doped Cs 2NaScCl 6 Double Perovskite Single Crystals toward Multifunctional Light-Emitting Diode Applications. ACS APPLIED MATERIALS & INTERFACES 2023; 15:24629-24637. [PMID: 37162456 DOI: 10.1021/acsami.3c03510] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Lead-free halide double perovskite, as one of the promising candidates for lead halide perovskite materials, shows great potential in light-emitting diodes (LEDs), benefiting from its environmental friendliness and high chemical stability. However, the poor regulation of the emission spectra severely limits its application range. Herein, various lanthanide ions were successfully doped in Cs2NaScCl6 double perovskite single crystals (DPSCs) to yield effective and stable emissions spanning from visible to near-infrared (NIR) regions. Notably, efficient energy transfer from the host to the dopants enables tunable emissions with good chromaticity, which is rarely reported in the field of lead-free double perovskite. Moreover, density functional theory calculations reveal that the high local electron density around the [LnCl6]3- octahedron in DPSCs plays a key role in the improvement of photoluminescence quantum yields (PLQYs). The optimal PLQYs are up to 84%, which increases around 3 times over that of the undoped sample. Finally, multicolor and NIR LEDs based on Ln3+-doped Cs2NaScCl6 DPSCs were fabricated and had different application functions. Specifically, the single-composite white LED shows adjustable coordinates and correlated color temperatures, while the NIR LED shows good night vision imaging. This work provides new inspiration for the application of efficient multifunctional LEDs based on lead-free double perovskite materials.
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Affiliation(s)
- Gang Yang
- College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China
| | - Songchao Bai
- College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China
| | - Xueguo Li
- College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China
| | - Hao Liang
- College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China
| | - Chao Li
- College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China
| | - Jie Sun
- College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China
| | - Yinhua Wang
- College of Physics, Liaoning University, Shenyang 110036, China
| | - Jinshu Huang
- College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China
| | - Gencai Pan
- School of Physics and Electronics, Henan University, Kaifeng 475004, China
| | - Yongsheng Zhu
- College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China
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