Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 18
·6220-6226
·
IF 6.4
Dayu Huang,Ziyong Cheng,Qiuyun Ouyang,Hongzhou Lian,Jun Lin
The lattice defects that occur in material preparation processes are closely related to carrier migration. The carrier migration can be regulated by artificially modulating the defects to improve the luminescence performance, which is important for the development and application of luminescent materials. Here, we achieved a 3.29-fold increase in the high-temperature luminescence intensity by introducing Mn2+ to generate Cl vacancy defects in Cs2CdCl4. Due to thermally induced electron de-trapping, Cs2CdCl4:Mn2+ also displays anti-thermal quenching (ATQ) behavior and good thermal quenching resistance (329% at 175 °C). The increase in the photoionization effect and de-trapping of the captured electrons from shallow trap states were appropriately attributed to this exceptional phenomenon, based on thermoluminescence (TL) analysis. Based on comprehensive optical characterization, thermoluminescence and temperature-dependent X-ray diffraction (XRD), we reveal that the Cl vacancy trap state generated by Mn doping is the reason for the enhanced PL in air. The discovery of these materials helps to better understand the optical properties of all-inorganic perovskites.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
·
2023
·Vol. 45
·期 7
·5053-5065
·
IF 4.2
Xu Lei,Lu Yu-ting,Wu Dong-feng,Li Xuan,Song Min,Hang Tai-jun,Su Meng-xiang
Wastewater-based epidemiology (WBE) is an objective approach for the estimation of population-level exposure to a wide range of substances, in which the use of a population biomarker (PB) could significantly reduce back-calculation errors. Although some endogenous or exogenous compounds such as cotinine and other hormones have been developed as PBs, more PBs still need to be identified and evaluated. This study aimed to propose a novel method to estimate population parameters from the mass load of metal ion biomarkers in wastewater, and estimate the consumption of tobacco in 24 cities in Southern China using the developed method. Daily wastewater samples were collected from 234 wastewater treatment plants (WWTPs) in 24 cities in Southern China. Atomic absorption spectroscopy (AAS) was applied to determine the concentrations of common health-related metal ions in wastewater, including sodium (Na), potassium (K), magnesium (Mg), calcium (Ca), iron (Fe), and zinc (Zn), and compared them with the daily mass load of cotinine corresponding to catchment populations. The concentrations of cotinine in wastewater samples were measured using liquid chromatography-tandem mass spectrometry. There were clear and strong correlations between the target metal ion equivalent population and census data. The correlation coefficients ( R ) were R K = 0.78, R Na = 0.66, R Ca = 0.81, R Mg = 0.77, and R Fe = 0.69, at p < 0.01 and R 2 > 0.6. Subsequently, the combination of WBE and metal ion PBs was used to estimate tobacco consumption. Daily consumption of nicotine was estimated to be approximately 1.76 ± 1.19 mg/d/capita, equivalent to an average of 13.0 ± 8.75 cigarettes/d being consumed by smokers. The data on tobacco consumption in this study were consistent with those in traditional surveys in Southern China. The metal ion potassium is an appropriate PB for reflecting the real-time population and could be used to evaluate the tobacco consumption in WBE study.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2023
·Vol. 17
·期 9
·2300094
·
IF 11
Zibin Liu,Xinzhen Ji,Zhuangzhuang Ma,Fei Zhang,Xiaofeng Qi,Xu Chen,Di Wu,Ying Liu,Mochen Jia,Xinjian Li,Yu Zhang,Chongxin Shan,Zhifeng Shi
Single-source white light-emitting diodes (WLEDs) with smart regulation of correlated color temperature (CCT) are indispensable for the next generation of WLEDs aimed at healthy and high-quality illumination, where a suitable CCT value is closely related to our emotions and circadian rhythm. Herein, this work constructs a single-component emission layer WLED with high performance for controllable daily lighting through Bi 3+ /Te 4+ dual-doped Cs 2 SnCl 6 engineering. The efficient energy transfers between triple self-trapped exciton states from Bi 3+ /Te 4+ doping allow two tunable broadband emissions that can cover the full-color region, thereby yielding a standout color-rendering index of 94 for the fabricated WLED. The robust stability against heat, ultraviolet light, and environmental oxygen/water induces a long half-lifetime of WLED up to 1104 h. Moreover, the dual-doped strategy endows the emitter with excitation-dependent luminescent characteristics, enabling the single emissive layer device to realize switching control of cold-, positive-, and warm-white light by converting the excitation chip. Meanwhile, continuous regulation of CCT for different application scenarios can be achieved by adjusting the current of different chips. This work constitutes a solid step toward building single-source WLEDs for smart and healthy lighting based on dual-doped lead-free metal halides.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Yanchao Yu,Yuan Gao,Wenjuan Wang,Hanyang Chen,Yuzhe Yun,Seeram Ramakrishna,Jun Zhang,Yun-Ze Long
Traditional detection methods usually use a spectrometer, which requires a professional tester to operate and is not convenient to carry around. Herein, we designed a 5G smartphone-based portable test sensor that uses a CsPbBr3 composite fibrous membrane prepared by a one-step in situ growth method as the test paper, and the test is realized by taking pictures with the smartphone. This portable detection method requires only one drop of liquid to be detected (<25 μL), which is superior to many detection systems that require a large amount of liquid to be detected (>1 mL). Moreover, the detection sensitivity can reach 0.1 ppm, which is more sensitive than the CsPbBr3 composite fiber membrane prepared by the conventional encapsulated method. In addition, this CsPbBr3 composite fiber membrane is reusable and can still achieve highly sensitive detection with a single drop after 100 uses. This smartphone-based portable test sensor is small in size and easy to use and can be used at home or outdoors anytime and anywhere.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yinhua Wang,Songchao Bai,Jie Sun,Hao Liang,Chao Li,Tianya Tan,Gang Yang,Jiwei Wang
Near-infrared (NIR) luminescent materials have been widely used in biomedicine, optical communication and other fields due to their unique photophysical properties. However, the development of efficient NIR luminescent materials is still a challenge. Herein, Sb 3+ , Tm 3+ co-doped Cs 2 NaYCl 6 double perovskite single crystals (SCs) have been synthesized. Benefiting from the crystal structure and rare earth lattice of rare earth-based double perovskite host, lanthanide ions can be doped effectively, and the optimal NIR photoluminescence quantum yield (PLQY) of Cs 2 NaYCl 6 :Sb 3+ , Tm 3+ SCs is up to 20.2%. The energy transfer mechanism was systematically surveyed by steady-state spectroscopy. Furthermore, a compact visible and NIR light emitting diode was fabricated by coating Cs 2 NaYCl 6 :Sb 3+ , Tm 3+ SCs on a commercial 320 nm LED chip. This light source has a promising application prospect in multifunctional lighting.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 15
·2207331
·
IF 15.1
Ruoting Yang,Dongwen Yang,Meng Wang,Fei Zhang,Xinzhen Ji,Mengyao Zhang,Mochen Jia,Xu Chen,Di Wu,Xin Jian Li,Yu Zhang,Zhifeng Shi,Chongxin Shan
Application of long-persistent luminescence (LPL) materials in many technological fields is in the spotlight. However, the exploration of undoped persistent luminescent materials with high emission efficiency, robust stability, and long persistent duration remains challenging. Here, inorganic cesium cadmium chlorine (CsCdCl 3 ) is developed, featuring remarkable LPL characteristics at room temperature, which is synthesized by a facile hydrothermal method. Excited by ultraviolet light, the CsCdCl 3 crystals exhibit an intense yellow emission with a large photoluminescence quantum yield of ≈90%. Different from the reported systems with lanthanides or transition metals doping, the CsCdCl 3 crystals without dopants perform yellow LPL with a long duration of 6000 s. Joint experiment-theory characterizations reveal the intrinsic point defects of CsCdCl 3 act as the trap centers of excited electrons and the carrier de-trapping process from such trap sites to localized emission centers contributes to the LPL. Encouraged by the attractive fluorescence and persistent luminescence as well as good stability of CsCdCl 3 against environment oxygen/moisture (75%), heat (100 °C for 10 h), and ultraviolet light irradiation, an effective dual-mode information storage-reading application is demonstrated. The results open up a new frontier for exploring LPL materials without dopants and provide an opportunity for advanced information storage compatible for practical applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Fan Chen,Xiao-Jun Wang,Xuehu Zhang,Changhua Zhang
Compositional tune and doping/alloying routes have become the research focus for tailoring optical features of lead-free metal halide double perovskites to advance the development of solid-state lighting and display applications. Cs 2 NaInCl 6 double perovskite is receiving tremendous attention owing to its excellent optical properties . In this paper, we have successfully obtained the lead-free Cs 2 NaInCl 6-x Br x :Sb 3+ perovskites using the hydrothermal method . Via the substitution of bromine ions for chloride ions in Cs 2 NaInCl 6 :Sb 3+ , a tunable emission from 445 nm to 480 nm was realized. The X-ray diffraction, scanning electron microscope , UV–vis absorption spectra , PL spectra, TRPL spectra, air stability and thermal stability were investigated in detail. The sample shows an admirable air stability and excellent thermal stability. The results demonstrate that the cyan-emitting Cs 2 NaInCl 6-x Br x :Sb 3+ perovskites can be applied to white LEDs, especially for the full-spectrum LED illumination.
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2023
·Vol. 31
·期 6
·10191-10200
·
IF 3.8
Peng Wang,Ying Wang,Wei Guan,Hongzhou Dong,Lina Sui,Zhixing Gan,Zhixing Gan,Lifeng Dong,Lifeng Dong,Liyan Yu,Liyan Yu
Mn2+ doped lead-free double perovskites are emerging afterglow materials that can avoid the usage of rare earth ions. However, the regulation of the afterglow time is still a challenge. In this work, the Mn doped Cs2Na0.2Ag0.8InCl6 crystals with afterglow emission at about 600 nm are synthesized by a solvothermal method. Then, the Mn2+ doped double perovskite crystals are crushed into different sizes. As the size decreases from 1.7 mm to 0.075 mm, the afterglow time decreases from 2070 s to 196 s. Steady-state photoluminescence (PL) spectra, time resolved PL, thermoluminescence (TL) reveal the afterglow time monotonously decreases due to the enhanced nonradiative surface trapping. The modulation on afterglow time will greatly promote their applications in various fields, such as bioimaging, sensing, encryption, and anti-counterfeiting. As a proof of concept, dynamic display of information is realized based on different afterglow times.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Li Zhang,Xinxin Li,Ye Tian,Bin Hao,Jiufang Han,Hong Chen,Bingsuo Zou,Chunhua Du
Inorganic perovskites have received much attention due to their stability and high performance in luminescence, photoelectric conversion, and photodetection. However, perovskite optoelectronic devices prepared by the solution technique are still suffering from time-consuming and complex operations. In this paper, a single-crystal perovskite-based photodetector (PD) is prepared by very fast one-step deposition of synthesizing microplatelets (MPs) on the electrode directly. The saturated precursor is carefully optimized by adding appropriate antisolvent chlorobenzene (CB) to fabricate the MPs with their PL wavelength ranging from 418 to 600 nm. Furthermore, the PDs with a low dark current on order of nanoangstroms, high responsivity and detectivity of up to 10.7 A W–1 and 1012 Jones, respectively, and an ultrafast response rate featured by 278/287 μs (rise/decay time) are achieved. These all-inorganic perovskite PDs with a simple fabricating process and tunable detection wavelength meet the evolution tendency of PDs toward low cost and high performance, which is a high-profile strategy to realize high-performance perovskite PDs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Xupeng Zhu,Jun Zhang,Jun Liao,Qiang Ru,Wenfeng Fu,Zhiguo Wang,Shuwen Xue
Return to the physics origin of Cu 2 ZnSnS 4 type (CZTS-type, include CZGS, CZGTS, CZTSSe, etc.) material system, studying the influence of replacement elements on the optoelectronic properties by preparing high-quality single crystal materials to clarify the relationship between the key defect states of materials and carrier dynamics is the only way which must be passed to find efficient paths to improve the existing performance of CZTS-type optoelectronic devices. Herein, the optical behavior of high-quality Cu 2 ZnGe x Sn 1-x S 4 (CZGTS) single crystal prepared by the molten salt method and its relationship with Ge content were systematically studied using a photoluminescence (PL) and absorption tests at room temperature. Combined with the simple electrical tests, the transformation of carrier recombination mechanism as increasing the Germanium content in CZGTS single crystal before and after phase transition were reported for the first time. The transmission electron microscopy images, X-ray diffraction spectra and Raman scattering spectra of CZGTS were adopted to reveal the evolution mechanism of single crystal growth and phase transition caused by the change of Ge composition. The results show that the tunable blue-shift of PL peak emerges with the increase of Ge content and the excitation power dependence has a saturation phenomenon in the CZGTS single crystal particles. In consideration of the optical bandgap, PL peak position, PL intensity, carrier lifetime and the macroscopic resistivity, it is confirmed that the intrinsic PL behavior could be effectively tailored by different Ge amounts. Compared with the recombination PL of interband carrier (E p > E g ) in Cu 2 ZnSnS 4 , the band tailed carriers (E p < E g ) dominated by defect states would play a powerful role in CZGTS single crystal. Our work provides a strategy for tailoring the bandgap of CZGTS materials and a new perspective for understanding the influence of defect states on carrier dynamics.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Jindou Shi,Minqiang Wang,Chen Zhang,Junnan Wang,Yun Zhou,Youlong Xu,Nikolai V. Gaponenko,Arshad Saleem Bhatti
Lead-free double perovskites (DP) have the potential to become a rising star in the next generation of lighting markets by addressing the toxicity and instability issues associated with traditional lead-based perovskites. However, high concentrations of hydrochloric acid (HCl) were often employed as a solvent in the preparation of most DPs, accompanied by slow crystallization at high temperatures, which not only raised the risk and cost in the preparation process, but also had a potential threat to the environment. Here, an in situ fabrication strategy was proposed to realize the crystallization of DP in the polymer at low temperature with a mild dimethyl sulfoxide (DMSO) solvent, and subsequently obtained optically well-behaved Cs2Na0.8Ag0.2BiCl6/PMMA composite films (CFs) by doping with Ag+, generating bright orange luminescence with a photoluminescence quantum yield (PLQY) of up to 21.52%. Moreover, the growth dynamics of Cs2Na0.8Ag0.2BiCl6/PMMA CFs was further investigated by in situ optical transformation, which was extended to other DP-based polymer CFs. Finally, these CFs exhibited excellent performance in optoelectronic devices and anticounterfeit printing, the results of which provide a new pathway to advance the development of lead-free DP materials in the optical field.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 9
·2203028
·
IF 9
Guozhen Li,Qiwen Pan,Zhihao Zhou,Ranran Gu,Hao Zhang,Xiongjian Huang,Guoping Dong,Xiudi Xiao
Perovskite CsPbX 3 (X = Cl, Br, I) nanocrystals with advantages of high quantum yield, narrow emission peaks, and tunable fluorescence are considered as the next generation of light-emitting sources. However, fluorescence degradation due to the poor stability of perovskite nanocrystals in moisture, high temperature, and illumination remains one of the greatest challenges in their further development. In this work, a fully dense coating strategy is proposed to improve the overall stability of perovskite nanocrystals, especially under high-density laser irradiation. A mesoporous silica SiO 2 layer is introduced to construct a stable coating for isolating the perovskite from external environment. To eliminate the pores of the CsPbX 3 @SiO 2 , an inorganic glass is also employed via solution-combustion technique to generate a fully compact encapsulation for further stability promotion. The as-prepared nanocrystal-in-glass composite exhibits efficient and stable fluorescence performance in luminous efficiency, chromaticity, and long-term reliability in the conditions of thermal shock, humidity, and blue laser irradiation. With the integration of red/green/blue emitting nanocrystals, the color gamut of the white laser lighting source covers 134% of the National Television Standards Committee standard, providing exciting opportunity for high performance laser-driven white light generation.
✓ 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）