DALTON TRANSACTIONS
·
2025
·
IF 3.3
Hong-Zhao Zan,Xiao-Zhong Wang,Hai-Xin Zhao,Shou-Wang Wang,Lei Chen,Hao-Yuan Wang,Lai-Zhi Zhao,Xiao-De Zhang,Xiang-Wen Kong
Low-dimensional organic–inorganic hybrid materials (OIHMs) in the field of luminescence have been occupying promising application prospects, but the toxicity and instability of lead-based halides are huge obstacles to the industrial utilization of these materials. Developing lead-free halides with low-toxicity and high stability have become important topics of research in recent years. Herein, we report three 0D In-based OIHMs (ABI)3(InBr6)Br (ABI = 2-aminium benzo-imidazole) 1, (DMA)4(InBr6)Br (DMA = dimethylammonium) 2, and (BAPP)(InBr6)Br·6H2O (BAPP = 1,4-bis(3-aminopropyl)piperazine) 3, which show maximum emission peaks within 605–622 nm, with a photoluminescence quantum yield (PLQY) of 60.80% being the highest achieved. More significantly, after one week of immersion in various organic solvents, these halides exhibit no structural degradation with their luminous intensity being well maintained. In addition, halide 1 as a yellow phosphor is used in the preparation of white light-emitting diodes (LEDs) with a high colour rendering index (CRI) of 90.3. This work provides new ideas and strategies for lead-free-based OIHMs in the field of optoelectronic materials.
研究领域:
光电子材料
·
发光材料
·
无机化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2025
·
IF 6.4
Qianrong Jin,Yuexiao Pan,Yali Tang,Suqin Chen,Jun Zou,Yingnuo Chen
The exploration of novel phosphors with excellent properties is of great significance for both fundamental research and practical applications in optoelectronic devices. In this study, we report the synthesis of a new 0 dimensional (0D) organic-inorganic hybrid metal halide (OIHMH), C6H14N2ZnCl4, upon doping with Mn²⁺ ions, it exhibits bright green emission centered at 535 nm, originating from the d-d transition of tetrahedrally coordinated Mn²⁺ ions. The sample achieve photoluminescence quantum yields (PLQYs) of 70% at a doping concentration of 40% and demonstrate good thermal stability, with luminescence intensity restored after a heating-cooling cycle. The as-prepared Mn²⁺-doped C6H14N2ZnCl4 crystals were further utilized to fabricate white light-emitting diodes (WLEDs), which demonstrated good performance with a correlated color temperature (CCT) of 6003 K and a color rendering index (CRI) of 79. Additionally, the bright green emission of the doped crystals was explored for anti-counterfeiting applications, showing promising potential in security marking. This work highlights the potential of Mn²⁺-doped OIHHPCs as high-performance phosphors for optoelectronic applications and security purposes.
研究领域:
材料科学
·
光学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Sheng Wang,Haihui Wang,Doudou Zhang,Yongjiang Dou,Wenqiang Li,Fan Cao,Luqiao Yin,Lin Wang,Zhi-Jun Zhang,Jianhua Zhang,Xuyong Yang
Metal halide perovskite nanocrystals (PNCs) offer excellent optoelectronic properties for light-emitting diodes (LEDs). However, the low chemical stability against water hinders their practical application. Herein, we develop a phase separation strategy to realize highly luminescent PNC-polymer composites with a superhydrophobic micro/nano structured surface. Ethyl α-cyanoacrylate (ECA) monomers and octavinyloctasilasesquioxane (OVS) are added into the PNC toluene solution together. Due to high reactivity of ECA toward H 2 O, the poly (ethyl α-cyanoacrylate) (PECA) polymer matrix (first phase) is initially formed via a rapid anion polymerization reaction in a humid environment. As the evaporation of toluene, the OVS is then condensed into the micro/nano-scale protrusions (second phase) on the PECA substrate because of the strong Si-O bonds between OVS molecules, and the PNCs are uniformly encapsulated within the two polymers. We find that besides the increased quantum efficiency, the chemical stability of the resulting PNC-PECA-OVS composites is remarkably enhanced. Immersing the superhydrophobic composites into water, the PL intensity still maintains ∼ 60% even after 1000 h. In contrast, the PL emission of pristine PNCs is completely quenched after only 10 min. By curing the green PNC-polymer composites with commercially available red-emitting phosphors on a blue-emitting InGaN chip, we demonstrate a long-term stable and efficient white LED with a high power efficiency of ∼ 93 lm/W and almost constant color-correlated temperature (CCT).
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Gaoke Dong,Bing Hu,Chen Chen,Hailong Yu,Qiuju Han,Wenzhi Wu
Organic–inorganic metal halides have attracted great attention due to their tunable structural and spectroscopic properties. Here, two organic–inorganic hybrid manganese bromides, (TEMA)2MnBr4 (TEMA = triethylmethylammonium) and (TEBA)2MnBr4 (TEBA = benzyltriethylammonium), are synthesized using the evaporation crystallization method. Following a heat-induced phase transition at 363 K, the structure and optical properties of (TEMA)2MnBr4 change but return to their initial state upon cooling to room temperature, as confirmed by X-ray diffraction, photoluminescence (PL), and Raman spectra. Meanwhile, (TEBA)2MnBr4, with a larger Mn–Mn distance, exhibits a higher photoluminescence quantum yield of 98.1% and greater thermal quenching temperature. However, due to the poorer thermal stability of the organic cation, the crystal melts at 400 K, leading to fluorescence quenching. White LEDs based on (TEMA)2MnBr4 and (TEBA)2MnBr4 are successfully fabricated with color rendering indices of 97.4 and 97.2, respectively. The investigation provides deep insights into the structural and optical properties of (TEMA)2MnBr4 and (TEBA)2MnBr4, advancing research for LED display design by tuning organic cations.
研究领域:
材料科学
·
光电技术
·
固体化学
✓ 已验证
DOI
高影响因子
BULLETIN OF MATERIALS SCIENCE
·
2016
·Vol. 39
·期 1
·187-193
·
IF 0.895
CAO RENPING,QIN ZHENGDONG,JIANG SHENHUA,LIANG AIHUI,LUO ZHIYANG,YU XIAOGUANG
A series of CaNb 2 O 6 : x Sm 3+ (0 ≤
x
≤ 10 mol%) and CaNb 2 O 6 : Sm 3+ , Na + /B 3+ phosphors were synthesized by the solid-state reaction method in air. Their crystal structures and luminescence properties were investigated and analysed, respectively. Host CaNb 2 O 6 emitted blue light with excitation 270 nm. CaNb 2 O 6 : x Sm 3+ phosphors showed a systematically varied hue from blue to white by changing Sm 3+ ion concentration from 0 to 10 mol% with excitation of 270 nm and their chromaticity coordinates were the regions from (0.1665, 0.1767) to (0.2484, 0.2260). Luminescence properties of CaNb 2 O 6 : Sm 3+ phosphor were tuned and improved significantly by codoping B 3+ or Na + ions. Energy transfer between Nb \(_{\mathbf {2}}\textit {O}_{\mathbf {6}}^{\boldsymbol {2-}}\) group and Sm 3+ ion was observed and analysed via luminescence properties. The luminous mechanism was explained by energy level scheme and energy transfer process in CaNb 2 O 6 : Sm 3+ phosphor. The strong excitation band peaking at ∼ 407 nm indicated that the CaNb 2 O 6 : Sm 3+ , Na + /B 3+ phosphor has a potential application in white light-emitting diodes based on near-UV LED chip.
研究领域:
材料科学
·
无机化学
·
发光材料
·
固体物理
·
光电子学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 12
·3604-3612
·
IF 5.934
Lili Wang,Xiaoying Kong,Peng Li,Weiguang Ran,Xuefang Lan,Qian Chen,Jinsheng Shi
Phosphors with high color purity and brightness are strongly desired for applications in areas such as solid-state lighting and displays. Herein, a new narrow-band intense green-emitting phosphor, Eu2+ doped CsKNaLi(Li3SiO4)4 (CKNLLSO) with a full width at half maximum of 55 nm, is reported. The substitutions of Eu2+ on three monovalent cations Na+, K+, and Cs+ resulted in three Gaussian emission bands. The barycenter energy of Eu2+ 4f65d configuration was calculated using a semi-empirical formula and compared with the experimental value. The rigid tunnel structure and luminescence concentration quenching were also analyzed to judge site occupation. The crystal and band structures of the host compound were characterized and calculated with the aid of Rietveld refinement and density functional theory, respectively. The CKNLLSO:Eu2+ phosphor exhibits relatively high thermal stability even if the temperature is increased to 190 °C. The optical properties of green and white LEDs fabricated by mixing the optimized CKNLLSO:4%Eu2+ phosphor without or with commercial blue and red phosphors were investigated. The detailed discussion about the relationship between the rigid tunnel structure and PL properties of CKNLLSO:Eu2+ will serve as a guide to develop new oxide-based narrow-band phosphors. All the results imply the great potential of Eu2+ doped CKNLLSO phosphors for applications in the field of backlighting or pc-wLEDs.
研究领域:
材料科学
·
光电学
·
固态照明
·
发光材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Sijin Zhang,Shujie Gai,Xiaojuan Zhang,Mao Xia,Zhi Zhou,Xiao Cheng,Maohai Yao,Maxim S. Molokeev,Qiuju Feng
Red and far-red emitting phosphors have been widely used in phosphor-converted light emitting diode (pc-LED) devices to provide lighting for indoor plant growth, thus achieving desired product qualities. Among the many ways to optimize phosphors’ optical performance, cationic substitution is one of the most effective methods. In this study, red phosphors (Li 2 MgTi 1- x - y O 4 : x Mn 4+ , y Ge 4+ ) were synthesized by high temperature solid state method and the optical performance of phosphors were improved with increasing Ge 4+ constituents. In particular, luminescence intensity of Li 2 MgTiO 4 : 0.002Mn 4+ , 0.1Ge 4+ increased by 152% under 468 nm excitation, and the thermostability of emission intensity increases from 22% ( y = 0) to 43% ( y = 0.1), which is about twice as much. Finally, pc-LED device was fabricated via the red phosphor Li 2 MgTiO 4 : 0.002Mn 4+ ,0.1Ge 4+ coated on a 470 nm ultraviolet chip. By changing the proportion of the phosphor, the electroluminescence spectra of pc-LED device could match well with the absorption regions of plant pigments. Therefore, Li 2 MgTiO 4 : 0.002Mn 4+ , 0.1Ge 4+ phosphor has potential application in plant lighting. Furthermore, this work can offer some helpful references for improving luminescent efficiency by simply modulating the chemical composition.
研究领域:
材料科学
·
光学
·
农业工程
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·Vol. 43
·期 10
·2100-2107
·
IF 5.2
Jing Yan,Junyu Hong,Xiaohui Li,Bojana Milićević,Lei Zhou,Chunyan Jiang,Mingmei Wu
Nowadays, high-quality phosphor-converted white light-emitting diodes (pc-WLEDs) ought to include cyan-emitting phosphors allowing for full-spectrum light similar to sunlight. Herein, we report a garnet-structured Ce 3+ -doped SrLu 2 Ga 1.5 Al 2.5 SiO 12 (SLGASO) phosphor that significantly compensates for the absence of cyan light, known as the “cyan cavity”. The SLGASO host crystallizes into a cubic structure with the I a 3 ¯ d space group. The cell parameters were determined using Rietveld refinement. Under 430 nm blue excitation, SLGASO:Ce 3+ emits intense cyan-green light in the 450–700 nm wavelength range. The representative SLGASO:0.07Ce 3+ phosphor has an internal quantum efficiency (IQE) of 95.4% and excellent thermal stability, remaining 92.7% of its initial emission intensity at 152 °C. After 155 d of immersion in water, the luminous intensity of SLGASO:0.07Ce 3+ remains constant, confirming its waterproofness. Furthermore, a pc-WLED device with luminous efficiency (LE) of 101.58 lm/W, color rendering index ( Ra ) of 91, correlated color temperature (CCT) of 4536 K, and Commission Internationale de L'Eclairage (CIE) chromaticity coordinates of (0.3555, 0.3390) was fabricated by combining as-prepared cyan-green-emitting SLGASO:0.07Ce 3+ , yellow-emitting Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce 3+ ), and red-emitting (Ca,Sr)AlSiN 3 :Eu 2+ phosphors, as well as a 450 nm blue chip. These findings indicate that SLGASO:0.07Ce 3+ phosphor can bridge the cyan gap and improve the performance of as-fabricated full-visible-spectrum WLEDs.
研究领域:
材料科学
·
光学材料
·
固态照明
·
无机化学
·
光电子学
✓ 已验证
DOI
高影响因子
ELECTROANALYSIS
·
2020
·Vol. 32
·期 9
·2018-2026
·
IF 2.544
Wanlin Dai,Wenyuan Zhao,Ying Ma,Jianshan Ye,Jiye Jin
We developed a miniaturized electrochemiluminescence (ECL) instrument coupled with a light-emitting diode-based bipolar electrochemical sensor (LED-BPES). This instrument composes of a microcontroller circuit, a power supply circuit, a potentiostat, an optical detecting circuit, and a communication circuit. The multi-pixel photon counter (MPPC), which is low-cost, small-size, and wide-range in optical measurements, is chosen as the optical detector. The LED-BPES composes of a disposable screen-printed carbon electrode (SPCE) and a surface-mount red LED. Depended on the closed bipolar electrode (C-BPE) structure, the LED-BPES not only avoids the employment of unstable and complex ECL reactions but also offers a cost-effective alternative for the over-priced ECL reagents by using a mini-size commercial LED as the luminescent producer. The combination of MPPC and LED-BPES helps to set up the simplified and downsized instrument system with low price and high efficiency. The presented instrument coupled with LED-BPES works excellent in electroactive molecules detection and has great potential in the application of heavy metal ions detection.
研究领域:
分析化学
·
生物传感技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Denan Mu,Jinfeng Xing
Double network hydrogel with excellent mechanical properties is a polymer material composed of interpenetrating polymer network structure. In this study, poly(acrylamide-co-acrylic acid)/sodium alginate (P(AAM-co-AAC)/SA) hydrogels were rapidly prepared by photopolymerization under green LED irradiation. Subsequently, poly(acrylamide-co-acrylic acid)/sodium alginate/tannic acid (P(AAM-co-AAC)/SA/TA) hydrogels were prepared by immersion method. The morphology, mechanical properties, the wet adhension ability and swelling behaviour morphology of P(AAM-co-AAC)/SA/TA hydrogels were studied in detail. The double network hydrogel has excellent mechanical properties, with the elongation at break and tensile strength reaching 862% and 0.77 MPa respectively. The hydrogel with tannic acid showed excellent adhesion, wet adhesion and anti-swelling capability. Our research provides a more efficient and environmentally friendly preparation method for hydrogels used in wet environment.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Lei Wang,Minjie Chen,Anhong Cai,Hanxuan Zeng,Xiaoyan Ma,Qingsong Li,Xueyan Li,Jing Deng
Chlorine activation-inefficiency and the generation of disinfection by-products (DBPs) have indeed limited the application of the UV/chlorine process. In this study, zinc ferrite nanorods (ZFO-R) with excellent photovoltaic properties were successfully prepared for the construction of a novel heterogeneous UV-LED-driven chlorine activation system. The addition of ZFO-R increased the first-order reaction rate constant for the degradation of carbamazepine (CBZ) by the UV-LED/chlorine process by 6 times. Mechanism investigation indicated that superoxide radicals (O 2 − ) dominated the generation of hydroxyl radicals (HO ) and chlorine radicals (Cl ) in the system by promoting the activation of HClO/ClO − , and the increased yields of HO and Cl enhanced their contribution to the degradation of the target pollutants. Importantly, the efficient activation of chlorine not only promoted the generation of reactive species but also inhibited the formation of DBPs by shorting the contact time between chlorine and precursors, which effectively controlled the toxicity of the reaction system. This work proposes a reliable strategy for inhibiting DBPs formation in the UV/chlorine process and broadens the application of spinel ferrites in environmental remediation, achieving efficient and reliable purification of actual micropolluted water bodies.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiahui Li,Boxuan Peng,Siyuan Yu,Fangzheng Zhao,Qiqi Han,Shuaibing Huang,Fengmin Jin,Jinfeng Xing
With the rapid development of industry, water pollution has become one of the important problems that harm the ecological environment and human health. The extensive use and random discharge of dyes have caused serious damage to water resources. Hydrogel bead is a promising material for dye adsorption due to its advantages of rich functional groups and high specific surface area. Here, acrylic acid sodium salt (AAS) and 2-acrylamide-2-methylpropanesulfonic acid (AMPS) as monomers, N,N’-Methylene-bis-acrylamide (MBA) as crosslinking agent, sodium alginate (SA) as semi-interpenetrating network component, laponite as nano-clay additive, and single 2′,4′,5′,7′ −tetrabromofluorescein disodium salt (EY)/ Triethanolamine (TEOA)/ diphenyl iodonium hexafluorophosphate (DPI) as green light polymerization initiating system were combined to prepare composite hydrogel beads within 10 s under green LED irradiation. The composite hydrogels were characterized by infrared spectroscopy (FTIR), thermogravimetric analyzer (TG), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The addition of sodium alginate and laponite can improve the mechanical properties of hydrogel beads. In the adsorption study of malachite green, the influence of time, temperature, dye concentration, pH, ionic strength, and other factors on the adsorption effect were investigated. The adsorption process was consistent with the second-order kinetic process and Langmuir adsorption. At room temperature, the highest adsorption capacity of the hydrogel beads for malachite green reached 829.63 mg/g. The PAAS-SL hydrogel beads maintained a high adsorption effect in the pH range (3–10), and the capacity reached 575.0 mg /g at pH 3, which had a good ability to resist low pH. In the adsorption–desorption experiments, the removal rate of PAAS-SL hydrogel beads for MG is still more than 80 % after 5 cycles. Our research provides a promising strategy for the efficient and rapid preparation of hydrogel beads with excellent properties.
✓ 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）