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Yan Z, Li P, Gong J, Liu M, Feng X, Zhang T, Li X, Guo D, Suo H, Wang Z. A novel blue emitting phosphor Ca 1-ySr yScBO 4:Bi 3+ with zero-thermal quenching for multi-scenario application. Dalton Trans 2024. [PMID: 38263884 DOI: 10.1039/d3dt03734g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
In recent years, Bi3+ activated phosphors have received a lot of attention from researchers; however, the performance and application areas of phosphors are yet to be developed. In this work, a series of CaScBO4(CSBO):xBi3+ phosphors were successfully prepared using a high-temperature solid-state method. Under UV excitation, blue light emission was achieved at 430 nm with a quantum yield of 91%, and at 423 K, the emission intensity retained 82.8% of the original intensity at 298 K. By crystal field engineering, the substitution of Sr2+ at the Ca2+ site enhances the temperature stability of the material, and at 423 K, 473 K and 573 K, the samples maintain 104%, 103% and 85% of the emission intensity at room temperature, respectively. It indicates that the cation substitution causes the increase in the oxygen vacancy concentration, and the oxygen vacancy defect compensates the energy lost in electrons at high temperature, producing resistance to anti-TQ performance. Finally, a blue-violet LED was fabricated by using the phosphor and an ultraviolet LED chip, and white LEDs (CCT = 4683 K, Ra = 89.7) were obtained by co-packaging this phosphor with commercial phosphors and a UV chip. Importantly, the great potential of this phosphor in the field of plant lighting and biocontrol can be demonstrated.
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Affiliation(s)
- Zekang Yan
- Hebei Key Laboratory of Optic-electronic Information and Materials, China.
- College of Physics Science & Technology, Hebei University, Baoding 071002, China
| | - Panlai Li
- Hebei Key Laboratory of Optic-electronic Information and Materials, China.
- College of Physics Science & Technology, Hebei University, Baoding 071002, China
| | - Jie Gong
- Hebei Key Laboratory of Optic-electronic Information and Materials, China.
- College of Physics Science & Technology, Hebei University, Baoding 071002, China
| | - Mengdi Liu
- Hebei Key Laboratory of Optic-electronic Information and Materials, China.
- College of Physics Science & Technology, Hebei University, Baoding 071002, China
| | - XiuXiu Feng
- Hebei Key Laboratory of Optic-electronic Information and Materials, China.
- College of Physics Science & Technology, Hebei University, Baoding 071002, China
| | - Ting Zhang
- Hebei Key Laboratory of Optic-electronic Information and Materials, China.
- College of Physics Science & Technology, Hebei University, Baoding 071002, China
| | - Xiaojie Li
- Hebei Key Laboratory of Optic-electronic Information and Materials, China.
- College of Physics Science & Technology, Hebei University, Baoding 071002, China
| | - Dongxu Guo
- Hebei Key Laboratory of Optic-electronic Information and Materials, China.
- College of Physics Science & Technology, Hebei University, Baoding 071002, China
| | - Hao Suo
- Hebei Key Laboratory of Optic-electronic Information and Materials, China.
- College of Physics Science & Technology, Hebei University, Baoding 071002, China
| | - Zhijun Wang
- Hebei Key Laboratory of Optic-electronic Information and Materials, China.
- College of Physics Science & Technology, Hebei University, Baoding 071002, China
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Liao Z, Qiu L, Zhang Q, Wei X, Chen Y, Yin M. Investigation of the luminescence properties and energy transfer mechanisms in Gd 3TaO 7:Bi 3+,Eu 3+ phosphors for their potential application in full-spectrum WLEDs. Dalton Trans 2023; 52:12504-12516. [PMID: 37605932 DOI: 10.1039/d3dt02065g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
In recent years, there has been increasing effort devoted to the development of single-phase white phosphors due to drawbacks such as severe reabsorption and color deviation in traditional white light-emitting diodes (WLEDs). A new feasible strategy has emerged for achieving white light emission through the Bi3+-Eu3+ energy transfer in suitable single-phase phosphors. Therefore, a series of Gd3TaO7:xBi3+ and Gd3TaO7:0.01Bi3+,yEu3+ phosphors were synthesized via a high-temperature solid-state method, and their properties were systematically characterized. In Gd3TaO7, Bi3+ occupies two kinds of Gd3+ site, resulting in two broad emission bands peaking at 427 nm and 500 nm respectively under ultraviolet (UV) excitation, which arise from 3P1 → 1S0 transitions. By adjusting the concentration of Eu3+ in Gd3TaO7:0.01Bi3+,yEu3+, effective energy transfer can occur between Bi3+ and Eu3+, thus enabling the regulation of green-white-red luminescence under 332 nm excitation and blue-white-red luminescence under 365 nm UV light irradiation. Upon stimulation with a 365 nm UV chip, Gd3TaO7:0.01Bi3+,0.02Eu3+ emits white light with CIE coordinates of (0.3509, 0.3202), a color temperature of 4629 K, and an impressive color rendering index of 87.96. The above results indicate the potential of Gd3TaO7:0.01Bi3+,yEu3+ phosphor as a viable candidate for WLED applications.
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Affiliation(s)
- Zhicheng Liao
- CAS Key Laboratory of Microscale Magnetic Resonance, and School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
| | - Liting Qiu
- Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences, School of Physical Sciences, University of Science and Technology of China, Hefei 230026, PR China.
| | - Qian Zhang
- Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences, School of Physical Sciences, University of Science and Technology of China, Hefei 230026, PR China.
| | - Xiantao Wei
- Physics Experiment Teaching Center, School of Physical Sciences, University of Science and Technology of China, Hefei 230026, PR China
| | - Yonghu Chen
- Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences, School of Physical Sciences, University of Science and Technology of China, Hefei 230026, PR China.
| | - Min Yin
- Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences, School of Physical Sciences, University of Science and Technology of China, Hefei 230026, PR China.
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Qin J, Jiang P, Cong R, Yang T. Exclusive confinement of Bi 3+-activators in the triangular prism enabling efficient and thermally stable green emission in the tridymite-type phosphor CaBaGa 4O 8:Bi 3. Dalton Trans 2023; 52:11638-11648. [PMID: 37552027 DOI: 10.1039/d3dt01928d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
Recently, Bi3+-activated phosphors have been extensively studied for potential applications in phosphor-converted white light-emitting diodes (pc-WLEDs). However, Bi3+ activators usually exhibit low quantum efficiency and poor thermal stability due to the outermost 6s6p-orbitals of Bi3+ being strongly coupled with the host lattice, inhibiting potential applications. Herein, we rationally design a novel phosphor CaBaGa4O8:Bi3+, which adopts a tridymite-type structure and crystallizes in the space group of Imm2. CaBaGa4O8:Bi3+ presents a bright green light emission peaking at 530 nm with a FWHM narrower than 90 nm. Comprehensive structural and spectroscopic analyses unravelled that Bi3+ emitters were site-selectively incorporated into the triangular prism (Ca2+-site) in CaBaGa4O8:Bi3+ since there exist two distinct crystallographic sites that can accommodate the Bi3+ ions. An excellent luminescence thermal stability of 73% of the ambient temperature photoluminescence intensity can be maintained at 423 K for CaBaGa4O8:0.007Bi3+. Impressively, the quantum efficiency (QE) of CaBaGa4O8:0.007Bi3+ was remarkably improved to 47.2% for CaBaGa4O8:0.007Bi3+,0.03Zn2+via incorporating the Zn2+ compensators without sacrificing the luminescence thermal stability. The high thermal stability and QE of CaBaGa4O8:0.007Bi3+,0.03Zn2+ are superior to most of the Bi3+-activated green-emitting oxide phosphors. The perspective applications in pc-WLEDs for CaBaGa4O8:0.007Bi3+,0.03Zn2+ were also studied by fabricating LED devices.
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Affiliation(s)
- Jie Qin
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China.
| | - Pengfei Jiang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China.
| | - Rihong Cong
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China.
| | - Tao Yang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China.
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Yang C, Liu W, You Q, Zhao X, Liu S, Xue L, Sun J, Jiang X. Recent Advances in Light-Conversion Phosphors for Plant Growth and Strategies for the Modulation of Photoluminescence Properties. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13111715. [PMID: 37299618 DOI: 10.3390/nano13111715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 05/20/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023]
Abstract
The advent of greenhouses greatly promoted the development of modern agriculture, which freed plants from regional and seasonal constraints. In plant growth, light plays a key role in plant photosynthesis. The photosynthesis of plants can selectively absorb light, and different light wavelengths result in different plant growth reactions. Currently, light-conversion films and plant-growth LEDs have become two effective ways to improve the efficiency of plant photosynthesis, among which phosphors are the most critical materials. This review begins with a brief introduction of the effects of light on plant growth and the various techniques for promoting plant growth. Next, we review the up-to-date development of phosphors for plant growth and discussed the luminescence centers commonly used in blue, red and far-red phosphors, as well as their photophysical properties. Then, we summarize the advantages of red and blue composite phosphors and their designing strategies. Finally, we describe several strategies for regulating the spectral position of phosphors, broadening the emission spectrum, and improving quantum efficiency and thermal stability. This review may offer a good reference for researchers improving phosphors to become more suitable for plant growth.
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Affiliation(s)
- Chengxiang Yang
- Institute for Smart Materials & Engineering, School of Materials Science and Engineering, University of Jinan, No. 336 Nanxinzhuang West Road, Jinan 250022, China
| | - Wei Liu
- Institute for Smart Materials & Engineering, School of Materials Science and Engineering, University of Jinan, No. 336 Nanxinzhuang West Road, Jinan 250022, China
| | - Qi You
- Institute for Smart Materials & Engineering, School of Materials Science and Engineering, University of Jinan, No. 336 Nanxinzhuang West Road, Jinan 250022, China
| | - Xiuxian Zhao
- Institute for Smart Materials & Engineering, School of Materials Science and Engineering, University of Jinan, No. 336 Nanxinzhuang West Road, Jinan 250022, China
| | - Shanshan Liu
- Institute for Smart Materials & Engineering, School of Materials Science and Engineering, University of Jinan, No. 336 Nanxinzhuang West Road, Jinan 250022, China
| | - Liang Xue
- Institute for Smart Materials & Engineering, School of Materials Science and Engineering, University of Jinan, No. 336 Nanxinzhuang West Road, Jinan 250022, China
| | - Junhua Sun
- School of Chemistry and Chemical Engineering, University of Jinan, No. 336 Nanxinzhuang West Road, Jinan 250022, China
| | - Xuchuan Jiang
- Institute for Smart Materials & Engineering, School of Materials Science and Engineering, University of Jinan, No. 336 Nanxinzhuang West Road, Jinan 250022, China
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