OPTICS AND LASER TECHNOLOGY
·
2024
·
IF 4.6
Shulei Li,Zhenxu Lin,Quantong Deng,Fu Deng,Mingcheng Panmai,Junying Chen,Yuheng Mao,Shimei Liu,Jun Dai,Yunbao Zheng,Rui Huang,Sheng Lan
Realization of long-term stable lasing from all-inorganic perovskite supercrystals is highly desirable for practical applications in optoelectronic devices. However, lasing from perovskite supercrystals excited by continuous wave laser light remains a challenge due to the photoluminescence degradation induced by thermal accumulation. Here, we report highly stable lasing with low threshold fom a CsPbClBr 2 supercrystal placed on a thin Ag film, which form a CsPbClBr 2 /Ag microcavity, by managing the thermal distribution inside the CsPbClBr 2 supercrystal. Combined numerical simulations and lifetime measurements, the localized electric field in such a hybrid microcavity leads to a spatially localized temperature distribution, which plays a crucial role in suppressing the thermal accumulation on the surface and in eliminating non-radiative recombination defects. The effective thermal management in the hybrid microcavity renders highly stable lasing with low threshold under the irradiation of continuouw wave laser light. Our findings provide a feasible and universal approach to the development of long-term stable perovskite laser.
研究领域:
光学工程
·
凝聚态物理
·
材料科学
·
纳米光子学
·
激光技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 30
·1965
·
IF 2.8
Wei Lianghuan,Dong Tianhao,Cui Yongpeng,Zhu Shengjie,Si Jianxiao
One potential application for flexible thermoelectric (TE) devices based on inorganic ductile fiber materials is the development of self-powered wearable electronics. In the work, the molten drawing method was employed for fabricating inorganic ductile Ag 2 S 0.7 Te 0.3 fibers. The output voltage and maximum output power of the single fiber are 3.3 mV and 837.4 nW, respectively, under a temperature difference of 50 K. The Ag 2 S 0.7 Te 0.3 fiber shows outstanding stability performance in the service stability test with a critical electric density of 36 A cm −2 and exhibits a tensile strain of 5%. The high temperature sensitivity of the Ag 2 S 0.7 Te 0.3 fibers TE device demonstrates the application potential in wearable electronics products.
研究领域:
材料科学
·
纳米科技
·
能源材料
·
柔性电子学
·
热电转换
✓ 已验证
DOI
高影响因子
Small
·
2021
·Vol. 18
·期 8
·2106323
·
IF 13.281
Jingwei Zhu,Benlin He,Xinpeng Yao,Haiyan Chen,Yanyan Duan,Jialong Duan,Qunwei Tang
The precise phase control of Cs-Pb-Br derivatives from 3D CsPbBr 3 to 0D Cs 4 PbBr 6 highly determines the photovoltaic performance of all-inorganic CsPbBr 3 perovskite solar cells (PSCs). Herein, the preferred phase conversion from precursor to Cs-Pb-Br derivatives is revealed by theoretically calculating the Gibbs free energies (∆ G ) of various phase conversion processes, allowing for a simplified multi-step solution-processable spin-coating method to hinder the formation of detrimental 0D Cs 4 PbBr 6 phase and enhance the photovoltaic performance of a PSC because of its large exciton binding energy, which is regarded as a recombination center. By further accelerating the interfacial charge extraction with a novel 2D transition metal dichalcogenide ReSe 2 , the hole-free CsPbBr 3 PSC achieves a champion efficiency of 10.67% with an impressive open-circuit voltage of 1.622 V and an excellent long-term stability. This work provides an in-depth understanding on the precise Cs-Pb-Br perovskite phase control and the effect of derivatives on photovoltaic performance of advanced CsPbBr 3 PSCs.
研究领域:
材料科学
·
光伏技术
·
纳米材料
·
能源化学
·
半导体物理
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Feng Tan,Xiao Jiang,Xianliang Qiao,Daming Sun,Jinsuo Gao,Xie Quan,Jingwen Chen,Suyu Ren,Yi Wang
A diffusive gradients in thin films (DGT) method using a new high-capacity cerium oxide (CeO 2 ) binding gel, for the first time, was developed for measuring dissolved inorganic arsenic in freshwater and seawater . The capacities of the new CeO 2 binding gel were 682 μg and 375 μg for As III and As V , respectively. The masses of As III and As V accumulated by CeO 2 -DGT device increased linearly with time and agreed well with the theoretical value calculated by DGT equation. The arsenic accumulation by CeO 2 -DGT was independent of pH (4.05–9.04) and ionic strength (0.1–750 mM), and common anions including CO 3 2− , SO 4 2− , Cl − and PO 4 3− had no obvious interference. CeO 2 -DGT showed excellent long-term deployment performance in freshwater and synthetic seawater . Field trials with CeO 2 -DGT achieved successfully the time-weighted-average concentrations of total inorganic arsenic in reservoir water (1.38 ± 0.09 μg/L) and coastal seawater (0.45 ± 0.06 μg/L). The results were comparable to those measured by grab sampling. The proposed method was reliable and robust for in-situ measurements of dissolved inorganic arsenic in environmental waters.
研究领域:
环境化学
·
分析化学
·
水环境监测
·
环境地球化学
·
污染生态学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·Vol. 9
·期 4
·105785
·
IF 5.909
Jinjia Guo,Yongmei Wang,Zhao Luo,Feng Zhang,Dewang Yang
Carbon cycle in coastal water is a significant dynamic component of global carbon budget , however, the diverse sources, carbon sinks and their complex interactions remained poorly understood. In order to detect the dissolved inorganic carbon (DIC) and their interactions, gas-liquid Raman spectroscopy was built and applied to simultaneously detect the constituents of air, dissolved CO 2 , HCO 3 - and chlorophyll in coastal water. The linear fitting curve between peak intensity and concentration was built for the quantitative analysis of HCO 3 - and CO 2 , meanwhile, the fluorescence peaks of chlorophyll at 679 nm were detected for the qualitative analysis. For the multi-components analysis, typical Raman spectra of the constituents of air, dissolved CO 2 , HCO 3 - in seawater, and the fluorescence spectra of chlorophyll in seawater were detected. Results showed that the time dependent change of CO 2 and O 2 in the air exhibited a contrary tendency, while that of dissolved CO 2 and O 2 was curved like a cosine. The changing tendency of relative concentrations of dissolved CO 2 was about 2 h earlier than CO 2 in air, due to the life activity of microorganisms driving the gas exchange at the air-sea interface. Furthermore, the study makes a study on the relationship between DIC and chlorophyll based on the detection of HCO 3 - and chlorophyll in coastal water, indicating that this gas-liquid Raman spectroscopy could successfully provide real-time analysis of multicomponent DIC in the air-sea exchanging process.
研究领域:
海洋化学
·
环境光谱学
·
碳循环
·
分析化学
·
生物地球化学
✓ 已验证
DOI
高影响因子
ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Yan Zhang,Zhenlong Zhang,Yanyan Liu,Yuefeng Liu,Huiping Gao,Yanli Mao
In this work, we synthesized CuInSe 2 quantum dots (CISe QDs) and applied them to perovskite solar cells (PSCs) as an inorganic hole-transporting material (HTM). A power conversion efficiency (PCE) of 12.8% was achieved for the PSCs using CISe QDs as the HTM, which is the highest value reported to date for devices with a Cu-based chalcopyrite semiconductor as HTM. More importantly, the stability of PSCs with CISe QDs was significantly improved compared with that of the devices using spiro-OMeTAD as the HTM. These results demonstrate that CISe QDs are a promising inorganic HTM for PSCs with long-term stability and low cost.
研究领域:
材料科学
·
光伏技术
·
纳米材料
·
能源化学
·
半导体物理
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 46
·期 1
·193-199
·
IF 4.177
Dongdong Xu,Fangfang Zhang,Yanzhou Sun,Zhihua Yang,Binghua Lei,Lili Liu,Shilie Pan
A new rare-earth borate LiRb2LaB2O6 (LB-1) has been synthesized using a high-temperature solution method. Interestingly, it shares its topological structure with the famous porous material MOF-5, which is formed from Zn4O(BDC)3 (BDC = 1,4-benzenedicarboxylate). The nodes [OZn4] and organic linkers [BDC] of MOF-5 are carefully substituted with La3+ rare-earth cations and the inorganic linkers [BO3] and [LiO4], respectively, in order to construct a pure inorganic open framework. LB-1 exhibits good thermal and water stability. Moreover, it possesses a short cut-off edge (<190 nm) and moderate birefringence (exp. 0.040@589.5 nm, cal. 0.038@589.5 nm). Further insights into the cut-off edge were given by first-principles calculations. The factors that influence the birefringence of LB-1 were discussed in view of the spatial arrangement of the [BO3] anionic groups.
研究领域:
无机化学
·
材料科学
·
晶体工程
·
光学材料
·
固体化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 82
·52024-52029
·
IF 3.108
Xiao-Fen Sun,Zhongxia Wang,Wei-Qiang Liao,Peng-Fei Li,Jixing Gao,Yi-Yang Huang,Hai-Peng Chen,Heng-Yun Ye,Yi Zhang
In this paper, three new hybrid phase transition compounds, [Hmpy]CdBr3 (1, Hmpy = N-methylpyrrolidinuium cation), [Hmpy]2CdBr4 (2) and [Hmpy]3CdBr3·CdBr4 (3), were synthetized by means of regulating the ratio of reactants. Systematic characterizations consisting of variable temperature X-ray single crystal diffraction, differential scanning calorimetry (DSC) and dielectric measurements reveal that 1 with infinite one-dimensional (1D) [CdBr3]n− chains undergoes a phase transition around 278 K; 2 with isolated [CdBr4]2− tetrahedrons exhibits a high-temperature phase transition close to 367 K, accompanied by prominent switchable dielectric behavior. Interestingly, 1D [CdBr3]n− chains and isolated [CdBr4]2− tetrahedrons both exist in 3, associated with a phase transition at 320 K. The phase transitions in the three compounds are originated from the order-disorder transitions of the Hmpy cation. It is expected that our finding would promote the development of hybrid dielectric transition materials with adjustable properties.
研究领域:
材料化学
·
凝聚态物理
·
晶体工程
·
功能材料
·
介电材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Pingfan Xu,Yaofa Luo,Peikun Zhang
Polyurethane (PU) composites integrated with outstanding fire retardancy, smoke suppression as well as ameliorated mechanical property is attractive, but remains a challenge. Here, we demonstrate the interfacial architecting of organic–inorganic hybrid (ACAPP) by reacting renewable chitooligosaccharide (COS) with ammonium polyphosphate (APP) and ammonium octamolybdate (AOM) via a one-pot, facile and eco-friendly approach. The ACAPP with multiple hydroxyl groups shows good compatibility and strong interfacial adhesion force with PU matrix due to the abundant covalent cross-linking points and hydrogen bonds networks. The incorporation of 15 wt% ACAPP enables the resultant PU composite to achieve a V-0 rating, a limiting oxygen index of 26.1%, 31.1% and 44.8% reduction in total heat release and total smoke production, respectively, far outdistancing conventional APP. The suppressed fire hazards mainly benefits from the synergy catalytic carbonization effect of ACAPP in condensed phase. Moreover, ACAPP reinforces the tensile strength of PU whilst retaining the decent ultimate elongation. This work may offer a referable exemplification for constructing green flame-retardant to balance high fire safety and mechanical properties.
研究领域:
高分子材料科学
·
阻燃化学
·
复合材料工程
·
绿色化学
·
材料界面科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 52
·期 19
·11701-11714
·
IF 2.599
Wei Xiuzhen,Hong Jialiang,Zhu Shuangshuang,Chen Jinyuan,Lv Bosheng
Polyethyleneimine (PEI) of various molecular weights and trimesoyl chloride (TMC) were utilized to prepare composite nanofiltration (NF) membranes via interfacial polymerization. The changes in the surface structure and chemical composition of the prepared membranes were evaluated using SEM, ATR-FTIR, XPS and surface potential measurements. The pure-water flux and rejection rates of the inorganic salts (MgCl 2 , MgSO 4 , Na 2 SO 4 and NaCl) through the resultant NF membranes were also investigated. The results showed that the performance of the composite NF membranes was significantly affected by the molecular weight of the PEI. Notably, the permeate flux and rejection rate of the NF membranes increased with the PEI molecular weight. In addition, when the NF membranes were used to treat actual wastewater from the electroplating industry, the NF membranes presented high-efficiency separation properties for heavy metal ions. The rejection rates of the NF membranes at 0.4 MPa for chromium, nickel, zinc and copper ions reached 92.6, 89.6, 89.2 and 86.3%, respectively.
研究领域:
材料科学
·
膜分离技术
·
环境工程
·
高分子化学
·
水处理
✓ 已验证
DOI
高影响因子
POLYHEDRON
·
2016
·
IF 2.108
Tongguang Sun,Fei Liang,Xinyuan Zhang,Heng Tu,Zheshuai Lin,Guochun Zhang,Yicheng Wu
Single crystals of three new organic–inorganic hybrid compounds, tri[1-(diaminomethylene)uronium] hexachlorobismuthate ((C 2 H 7 N 4 S) 3 BiCl 6 ·H 2 O, HATU-BCH), bis[1-(diaminomethylene)uronium] pentabromobismuthate, ((C 2 H 7 N 4 S) 2 BiBr 5 , HATU-BB), and bis [3,5-diamino-1,2,4-thiadiazol-2-ium] pentaiodobismuthate ((C 2 H 5 N 4 S) 2 BiI 5 , OHATU-BI), have been successfully grown by slow evaporation method. Their structures were determined by single - crystal X-ray diffraction, in which all anion sublattice structures consist of hexahalobismuthates octahedra with different connection modes involving isolated, shared-corner, and shared-edge. The spectra characters were studied by Infrared and Raman spectra, which interpreted by calculation of the density functional theory (DFT) method and diffuse reflectance spectra. Thermal properties were characterized by thermal gravimetric analysis and differential scanning calorimetry.
研究领域:
材料化学
·
晶体工程
·
配位化学
·
光谱学
·
热分析
·
计算化学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2022
·
IF 5.6
Min Yang,Yujia Yan,Enzhou Liu,Qian Sun,Jun Fan
In recent years, all-inorganic perovskite has been extensively studied due to its excellent photoelectric properties, but the application of Cs n PbBr 2+ n perovskite with excellent stability in the field of chemical sensing has yet to be developed. Herein, Cs 4 PbBr 6 /CsPbBr 3 with good stability was successfully prepared by controlling the synthesis temperature to 100 ° C. The fluorescence intensity of Cs 4 PbBr 6 /CsPbBr 3 exhibited 2,4-dinitriphenylhydrazine (DNPH) concentration-dependent characteristics and could be used for sensing DNPH based on the dynamic quenching process triggered by the collision between Cs 4 PbBr 6 /CsPbBr 3 and DNPH. A good linear model was established based on the detection signal and DNPH concentration in the range of 0.05∼30 mg/L and the detection limit was 0.033 mg/L. This method was applied to detect DNPH in soil and tap water samples with satisfactory results obtained. Therefore, this research broadens the application of Cs n PbBr 2+ n in the field of quantitative detection and is expected to be developed into a fluorescent sensor for the detection of hydrazine substances.
研究领域:
分析化学
·
材料科学
·
环境监测
·
传感器技术
·
光电子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）