JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
You Li,Sai Xu,Qun Zhang,Yuefeng Gao,Xizhen Zhang,Yongze Cao,Hongquan Yu,Xiangping Li,Baojiu Chen
Inorganic lead-free halide perovskites are quite desirable for various applications due to their outstanding optoelectronic performances. However, excitation wavelength-dependent multi-emission in a single luminophore is less reported. In this study, Sb 3+ /Bi 3+ /Er 3+ codoped Cs 2 Ag 0.1 Na 0.9 InCl 6 lead-free double perovskite with upconversion and downshifting luminescence modes has been developed. The double perovskite displays a dual-emission band located at 450 nm and 580 nm under excitation of 355 nm. The blue emission originates from self-trapped excitons (STEs) in [SbCl 6 ] 3- octahedrons, while the yellow emission comes from STEs between states localized in the BiCl 6 and AgCl 6 octahedra. Interestingly, the phosphor’s emission can be dynamically adjusted by excitation wavelength and Sb 3+ doping concentration. Not only that, the phosphor can also generate upconversion green light upon the irradiation of 980 nm lasers. The multi-excitation wavelength characteristics of this perovskite make it very suitable as a material for anti-counterfeiting and encoded information storage, and the excellent temperature stability and moisture resistance of this perovskite also make it more promising.
研究领域:
材料科学
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光电技术
·
光子学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2023
·
IF 9
Xiu-Xian Guo,Jun-Hua Wei,Jian-Bin Luo,Zi-Lin He,Zhi-Zhong Zhang,Jing-Hua Chen,Dai-Bin Kuang
Single-source white-light emitters are highlighted with stable color and excellent color rendering ability, which can largely simplify the white-light-emitting-diode (WLED) structure. All-inorganic and lead-free double perovskites have attracted extensive research interest and provide versatile doping sites to accommodate the extrinsic multi-valent ions. Herein, the synthesis and tunable emission of Sb 3+ –Ln 3+ -codoped Cs 2 NaYCl 6 single crystals (SCs) is reported. Particularly, bright white-light emission with a high photoluminescence quantum yield of 80.5% is yielded in 0.5%Sb 3+ –2%Tb 3+ –2%Sm 3+ -codoped Cs 2 NaYCl 6 SCs. Steady-state photoluminescence (PL) and time-resolved PL spectra are employed to reveal the energy transfer from Sb 3+ -induced self-trapped excitons to Ln 3+ ions. Temperature-dependent PL spectra further demonstrate that the fluorescence intensity ratio of band 657 to band 590 nm is highly dependent on the temperature, and the relative sensitivity reaches a maximum of up to 1.59% K −1 at 260 K. Moreover, the WLED based on 0.5%Sb 3+ -2%Tb 3+ -2%Sm 3+ -codoped Cs 2 NaYCl 6 SCs delivers a higher average color rendering index of 87 than 0.5%Sb 3+ -0.8%Tb 3+ -2.5%Ho 3+ -codoped Cs 2 NaYCl 6 (74.6). The outstanding white-light-emission performance together with the high temperature dependence of the fluorescence spectra confers Sb 3+ –Ln 3+ -codoped Cs 2 NaYCl 6 with huge application potential in solid-state lighting and ratiometric optical thermometry.
研究领域:
材料科学
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光学
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固态照明
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温度传感
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 22
·5960-5968
·
IF 7.779
Qiqiong Ren,Jian Zhang,Maxim S. Molokeev,Guojun Zhou,Xian-Ming Zhang
Low-dimensional metal halides have emerged as promising platforms for the development of new-generation phosphor-converted light emitting diodes (pc-LEDs), in which zero-dimensional (0D) hybrids with lone-pair ns2 states, in particular, show unprecedented competitiveness owing to their fascinating photoluminescence (PL) properties. Herein, we designed a novel 0D indium hybrid, (C20H20P)2InCl5, and proposed a co-doping strategy to incorporate Bi3+ (6s2) and Sb3+ (5s2) ions into this indium hybrid. Widely tunable emissions from blue to red are achieved, which are assigned to the triplet self-trapped excitons (STEs) (3P1 → 1S0) of Bi3+ (476 nm) and Sb3+ (658 nm), respectively. Importantly, an uncommon triplet–triplet energy transfer from Bi3+ to Sb3+ contributes to tunable dual emissions, and enables a single-phase cool white-light emission under ultraviolet (UV) excitation. Moreover, the energy transfer mechanism is discussed clearly by fluorescence photon dynamic analysis and DFT calculations. This work provides a deeper insight into triplet–triplet energy transfer, as well as presents a new model system for tuning the PL behaviours of ns2 configuration dopants.
研究领域:
材料科学
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光电技术
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光子学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Huangyao Chen,Chonghui Qi,Xiang Guo,Jun Zhang,Chaoyong Deng,Ruirui Cui
In lead-free halide double perovskites, doping and alloying are key strategies for optical performance enhancement. However, achieving stable full-spectrum white emission in single-component phosphors remains challenging. Herein, high-quality single-phase white emission is realized in Cs2NaGdCl6 via Sb3+/Tb3+/Mn2+ codoping. Pristine Cs2NaGdCl6 shows a weak sky-blue emission, while Sb3+ doping significantly enhances the self-trapped exciton (STE) intensity. Density functional theory calculations show that Sb3+ doping creates new sensitizing states, boosting the STE emission. Under Sb3+ sensitization, STE energy transfers to Tb3+ and Mn2+. The incorporation of Tb3+ elevates the photoluminescence quantum yield from 0.66% (pristine) to 68.38% (CNGC: Sb3+, Tb3+), while the broadband red emission from Mn2+ plays a critical role in achieving full-spectrum coverage. Tunable white-light emission is achieved via a dopant ratio optimization. Combining the phosphor with a 340 nm commercial light-emitting diode chip produces a white light-emitting diode with a correlated color temperature of 4658 K and a color rendering index of 91.9. Temperature-dependent photoluminescence spectra confirm ratiometric sensing capability, yielding maximum relative sensitivities (Sr) of 1.06%/K (I463 nm/I608 nm) and 1.12%/K (I548 nm/I608 nm) at 298 K. These results demonstrate that this material exhibits multifunctional application potential in the fields of white-light illumination, optical thermometry, and fluorescent anticounterfeiting.
研究领域:
材料科学
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光学材料
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固态照明
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光学传感
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光子学
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测温技术
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防伪技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xi Chen,Yingnuo Chen,Yuexiao Pan,Wenxia Zhang
The development of efficient and environmentally benign luminescent materials is of paramount importance for sustainable lighting and display technologies. This study presents a novel zero-dimensional (0D) organic-inorganic hybrid metal halides (OIHMHs), (Cyt) 2 InCl 5 ·H 2 O:Sb 3+ , with tunable white-light emission through synergistic organic-inorganic interactions and Sb 3+ doping. The incorporation of Sb 3+ ions through doping establishes energy transfer pathways from singlet exciton recombination (S 1 ) and triplet exciton recombination (T 1 ) energy levels to self-trapped excitons (STEs), thereby enabling precise control over fluorescence emission and phosphorescence characteristics. This strategic modification concurrently enhances the photoluminescence quantum yields (PLQYs) and thermal stability the material. Density functional theory (DFT) calculations further provide insights into the electronic structure and defect-related properties of the crystals. The Sb 3+ -doped (Cyt) 2 InCl 5 ·H 2 O materials demonstrate excellent performance in solid state lightings, achieving high color rendering index (CRI) and adjustable correlated color temperature (CCT). Additionally, the long-persistent luminescence and X-ray scintillation properties are explored for anti-counterfeiting and radiation detection applications.
研究领域:
材料科学
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光学材料
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固态照明
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发光材料
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无机化学
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物理化学
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显示技术
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辐射探测
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防伪技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Yongrun Dong,Wen Li,Tao Huang,Shuaigang Ge,Linghang Kong,Chuang Ning,Zequan Li,Wei Gao,Bingsuo Zou
Recently, lead-free double perovskites have been regarded as a promising alternative to lead halide perovskites due to their wide emission band, and environmental protection and stability properties, and are expected to become a series of rising star materials in the lighting field. However, currently, the growth of most lead-free double perovskites occurs in the strong acid environment, which not only brings high cost and environment risk, but also makes it hard to realize large-scale applications with powder products. Herein, we apply a strategy of in situ synthesis of lead-free double perovskites in a polymer matrix by using a small amount of precursors and relatively friendly DMSO solvent to obtain efficiently luminescent Sb3+/Mn2+ co-doped Cs2KInCl6/PVDF composite films in a large-area. The co-doping of Mn2+/Sb3+ into this inorganic double perovskite matrix makes microcrystals with good crystallinity and size distribution in this polymer. The as prepared co-doping composite film with Mn/Sb feeding ratio 16 : 1 shows the brightest white light emission under 320 nm excitation, with a photoluminescence quantum yield (PLQY) as high as 86.98%. The energy transfer (E-T) from the charge-transfer band to the triplet self-trapped exciton (STE) around Sb3+ and then to the ferromagnetic (FM) coupled Mn2+ pair 3d state was confirmed by the temperature-dependent PL spectra and density functional theory calculations. Finally, a single-compound white light emitting diode with chromatic coordinates of (0.31, 0.33) and fluorescent anti-counterfeiting labels could be fabricated based on this composite film with the best white emission. This work provides a new strategy for the application of lead-free double perovskites in the fields of lighting and anti-counterfeiting.
研究领域:
材料科学
·
光电技术
·
光子学
·
纳米技术
·
照明技术
·
防伪技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Yanyang Li,Huimin Du,Yue Ma,Meifang Liu,Jian Zou,Shentang Wang,Jun Yang,Shanshan Hu,Jun Lin
The existence of energy transfer channels from the self-trapped exciton (STE) emission to lanthanide (Ln3+) ions in double perovskites (DPs) opens up new possibilities for high security anti-counterfeiting applications. In the present investigation, we synthesized Sb3+/Ho3+/Er3+ doped Cs2NaGdCl6 rare-earth-based DPs using a simple solvothermal method, whose luminescence could be quenched by water and restored after drying. The efficient down-shifting (DS) red emission from the 4f–4f transition of Ho3+ was enhanced 8-fold due to the energy transfer of STEs → Ho3+ ions via Sb3+ sensitization. The DS and up-conversion (UC) dual-mode multicolor emissions were obtained by further introducing Er3+. Specifically, the DS luminescence of the tri-doped sample under the UV region and that under 448 nm irradiation were white and red, respectively; and the UC luminescence under 980 nm irradiation was green. In view of their stimulus response to water and dual-mode multicolor luminescence properties, advanced anti-counterfeiting materials based on the obtained samples were designed.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 46
·16390-16397
·
IF 6.4
Dayu Huang,Pan Zheng,Ziyong Cheng,Qiuyun Ouyang,Hongzhou Lian,Jun Lin
It is of great interest to obtain multiple luminescent products from a single reaction, such as existing core–shell nanomaterials and heterojunction nanomaterials, all with the aim of enriching the photoelectric properties of the materials. Here, we report a hydrothermal approach for creating crystals of needle-shaped RbCdCl3:Sb3+ and bulk-shaped Rb4CdCl6:Sb3+, two antimony doped-cadmium based metal halides. Two crystal materials with different shapes and phases can be synthesized simultaneously at the same stoichiometric ratio. RbCdCl3:Sb3+ is needle-shaped, whereas Rb4CdCl6:Sb3+ is bulk-shaped. Under 320 nm excitation wavelength irradiation, blue emission (490 nm) of Rb4CdCl6:Sb3+ and yellow emission (560 nm) of RbCdCl3:Sb3+ can be attained. Interestingly at low temperatures RbCdCl3:Sb3+ shows double peaked emissions (460 and 560 nm). This study investigates Sb3+-doped RbCdCl3 crystals that exhibit double luminescence as a result of intrinsic host self-trapped excitons and extrinsic dopant-induced self-trapped excitons (STEs), which are referred to as host STEs and Sb3+ dopant STEs, respectively. The construction of multicolor light-emitting devices is made possible by their color kinetics characteristics.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jiayu Liao,Peixiong Zhang,Xiaochen Niu,Hong Hong,Hao Yin,Zhen Li,Yin Hang,Zhenqiang Chen
A 2 BB’ X 6 double perovskite has recently been considered as a potential substitute for lead-based halide perovskite . In particular, the lead-free Cs 2 AgInCl 6 material possesses excellent moisture and thermal stability. However, the wide bandgap of the Cs 2 AgInCl 6 host limits its optical properties . Doping with active elements is a unique avenue to endow Cs 2 AgInCl 6 with excellent optical properties . Here, a strategy is proposed to explore the efficiency of near-infrared (NIR) emissions in Ln 3+ (Ln Nd, Yb) ions doped Cs 2 AgInCl 6 microcrystal by the codoping of Sb 3+ ion for the first time. The incorporation of Sb 3+ ion emerges a new optical absorption channel at a longer wavelength (>350 nm) and reduces the electron bandgap. Under the excitation at 365 nm, Sb 3+ and Ln 3+ (Ln Nd, Yb) co-doped Cs 2 AgInCl 6 show the efficient NIR emission peaking at around 1000 nm, attributing to the effective energy transfer from Sb 3+ to Yb 3+ or Nd 3+ f-electrons. Accordingly, the photoluminescence mechanism and environmental stability of Sb 3+ and Ln 3+ (Ln Nd, Yb) co-doped Cs 2 AgInCl 6 microcrystal were also discussed in detail. This work demonstrates the availability of the Sb 3+ doping tactics to realize efficient NIR emission in Ln 3+ (Ln Nd, Yb) doped Cs 2 AgInCl 6 microcrystal.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Yuelong Liu,Jinyan Liu,Bo Chen,Xiaohui Ren
Corrosion of metals has significant implications for international livelihoods, and excessive pickling can lead to corrosion of Q235 steel during the production process, thus, this study investigates the corrosion inhibition performance of three betaine surfactants (SB3-n, 10, 12, 14) with different carbon chain lengths and KI compounds, on Q235 steel in 1 mol·L -1 hydrochloric acid through experimental and theoretical analyses. The results show that the optimal efficiency of SB3-n/KI can be above 90%. Corrosion inhibitors adsorb simultaneously on the metal surface, making the metal surface smooth and flat. Theoretical analysis shows that the adsorption ability of I - is higher than that of Cl - , and all three compound inhibitors adsorb on the metal surface chemically, with the adsorption energy in the order of SB3-14
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Xinyu Shi,Zhilin Li,Mengyan Cao,Zhihui Rao,Xiujian Zhao,Xiao Gong
Due to the toxicity and instability issues of lead halide perovskites, lead-free perovskites have recently emerged as a viable alternative. However, significant optical band gaps of lead-free perovskites exert influence on their luminescent properties. Fortunately, the addition of dopants becomes an efficacious solution. The current widely utilized methods for synthesizing perovskites almost require high temperatures, a long period, and atmosphere protection, which cost more energy and resources. In this paper, we report that Rb2ZrCl6:xSb3+ perovskite phosphors can be easily prepared by a wet grinding approach at room temperature, which is a more efficient and facile process. Due to the self-trapped excitons of the host structure and Sb3+ ions, the produced samples display blue-white and orange fluorescence under UV lamp irradiation at 254 and 365 nm, respectively. In the photoluminescence spectrum, the doped perovskite exhibits an emission peak at 630 nm under excitation at 365 nm. Importantly, the prepared phosphors have tunable emissions related to the excitation wavelength. In addition, our produced powders show remarkable stability at room temperature, laying the foundations for this approach to be widely used in perovskite production.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry Letters
·
2019
·
IF 7.329
Xiangtong Zhang,Hua Wang,Yue Hu,Yixian Pei,Shixun Wang,Zhifeng Shi,Vicki L. Colvin,Shengnian Wang,Yu Zhang,William W. Yu
Colloidal lead halide perovskite nanocrystals (NCs) have high tunability in the visible light region and high photoluminescence quantum yields (PL QYs) for green and red emissions, but bright blue emission is still a challenge. Super small CsPbBr3 perovskite NCs emit blue light around 460 nm with a narrow peak width, and they do not have the problem of phase separation like their Cl–Br counterparts. However, the blue emission from super small CsPbBr3 NCs easily becomes green over time, and their PL QY is still low. The doping of Sb3+ ions successfully reduced the surface energy, improved the lattice energy, passivated the defect states below the band gap, eventually boosted the PL QY of blue emission to 73.8%, and resulted in better spectral stability even at elevated temperatures in solution (40–100 °C). Its CIE coordinates were (0.14, 0.06), which are close to the primary blue color (0.155, 0.070) according to the NTSC TV color standard.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
光子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）