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学者姓名：王丽
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摘要 ：
MAPbBr(3) single crystals have attracted much attention because of their high quantum efficiency and photoluminescence (PL) peaks. It has been researched that the crystal has two PL peaks and the additional PL peak comes from the "PbBr2" defect in the crystal. This can be well applied to dual-wavelength lasers. However, the change rule of the PL two peaks intensity is not clear. Herein. Crystals with two PL peaks are obtained by inverse temperature crystallization. We research the crystal structures of MABr and PbBr2 in different proportions, and find that these crystals have varying degrees of defects. Moreover, we confirm that these defects are Schottky defects based on experimental and simulated XRD. The optical properties of the samples are studied, which suggest that the PL intensity is related to the ratio of MABr to PbBr2. The energy level distribution of the crystal is calculated by energy level simulation, which further explains that the 536 nm is generated by "PbBr2" and the 567 nm is generated by MAPbBr3. All the results illustrate that the intensity of two peaks can be adjusted by the ratio of MABr to PbBr2. The maximum intensity is at 536 nm for MABr: PbBr2 = 2 and 567 nm for MABr: PbBr2 = 0.5. We explain this change rule of two peaks intensities from the energy level point of view and obtained MAPbBr(3) crystals with high PL intensity corresponding to different wavelengths. This research provides a theoretical basis for the change in PL bimodal intensity, and an experimental reference for perovskite dual-wavelength laser.
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| GB/T 7714 | Chen, Rui-xiang , Su, Xue-qiong , Wang, Jin et al. Modulation of photoluminescence intensity by surface defects of MAPbBr3 crystals [J]. | OPTICAL MATERIALS , 2023 , 138 . |
| MLA | Chen, Rui-xiang et al. "Modulation of photoluminescence intensity by surface defects of MAPbBr3 crystals" . | OPTICAL MATERIALS 138 (2023) . |
| APA | Chen, Rui-xiang , Su, Xue-qiong , Wang, Jin , Gao, Dong-wen , Pan, Yong , Wang, Li . Modulation of photoluminescence intensity by surface defects of MAPbBr3 crystals . | OPTICAL MATERIALS , 2023 , 138 . |
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摘要 ：
Quantum dots (QDs) laser has become an important way to solve micro-application problems in many fields. However, single wavelength distributed Bragg reflector (DBR) has many limitations in practical applications, such as signal transmission. How to realize multiwavelength DBR lasing output simply is a challenge. To achieve a stable multi-wavelength quantum dots laser in the near-infrared region, the perovskite CsPbI3 QDs laser with DBR structure is developed in this paper. A tetragonal crystal structure with complete bonding information and no defect is explained by X-ray diffractions (XRD) and Raman spectrum. The cross-section morphology of the DBR laser and the surface morphology of QDs is measured by scanning electron microscope (SEM) and transmission electron microscope (TEM), respectively. An elliptical light propagation field and a double wavelength laser radiation are obtained from the finite-difference time-domain (FDTD) simulation. The output of the three wavelength lasers at 770 nm, 823 nm, and 873 nm is measured. The emission time of a DBR laser is about 2 h, and the average fluorescence quantum yield is 60%. The cavity length selection and energy level model are put in place to clearly see the working mechanism. All the results suggest that an effective and stable CsPbI3 quantum dots DBR laser is realized.
关键词 ：
CsPbI3 perovskite CsPbI3 perovskite QDs QDs multiwavelength multiwavelength DBR laser DBR laser
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| GB/T 7714 | Su, Xueqiong , Pan, Yong , Gao, Dongwen et al. Surface Vertical Multi-Emission Laser with Distributed Bragg Reflector Feedback from CsPbI3 Quantum Dots [J]. | NANOMATERIALS , 2023 , 13 (10) . |
| MLA | Su, Xueqiong et al. "Surface Vertical Multi-Emission Laser with Distributed Bragg Reflector Feedback from CsPbI3 Quantum Dots" . | NANOMATERIALS 13 . 10 (2023) . |
| APA | Su, Xueqiong , Pan, Yong , Gao, Dongwen , Wang, Jin , Yu, Huimin , Chen, Ruixiang et al. Surface Vertical Multi-Emission Laser with Distributed Bragg Reflector Feedback from CsPbI3 Quantum Dots . | NANOMATERIALS , 2023 , 13 (10) . |
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摘要 ：
This paper investigates the dual-parameter sensing of temperature and strain using a-phase-shifted fiber Bragg gratings (a-PSFBGs). In many practical engineering applications, temperature and strain are often present simultaneously, which can interfere with each other's sensing. To achieve dual-parameter sensing of temperature and strain, two a-PSFBGs are modified with phase-shifted peaks of 1547 nm and 1550 nm, respectively. The a-PSFBG of 1547 nm is wrapped with a heat shrinkable tube to increase its temperature sensing sensitivity by 185.6%, while its strain sensing sensitivity is reduced by 91.083%. The a-PSFBG of 1550 nm is coated with indium tin oxide (ITO) film using the pulsed laser deposition (PLD) method to increase its temperature sensing sensitivity by 22.3%, while its strain sensing sensitivity is reduced by 16.03%. Finally, the two modified a-PSFBGs are cascaded to realize dual-parameter sensing of temperature and strain. The ITO film coating on the surface and heat shrinkable tube wrapping can reduce the interference of external light on the signal light and protect the fiber grating. By setting the optical spectrum analyzer (OSA) accuracy to 0.02 nm, the sensing in-formation can be extracted by scanning within a few nanometers, and the sharp phase-shifted peak of the a-PSFBG helps accurately locate the signal wavelength. The results demonstrate the potential for the practical application of the proposed dual-parameter sensing method.
关键词 ：
Pulsed laser deposition Pulsed laser deposition Indium tin oxide Indium tin oxide Sensing Sensing a-Phase-shifted fiber Bragg grating a-Phase-shifted fiber Bragg grating Heat shrinkable tube Heat shrinkable tube
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| GB/T 7714 | Cheng, Hao , Wang, Li , Wang, Jin . Dual-parameter sensing of temperature and strain realized by two a-PSFBGs cascaded [J]. | OPTICAL FIBER TECHNOLOGY , 2023 , 79 . |
| MLA | Cheng, Hao et al. "Dual-parameter sensing of temperature and strain realized by two a-PSFBGs cascaded" . | OPTICAL FIBER TECHNOLOGY 79 (2023) . |
| APA | Cheng, Hao , Wang, Li , Wang, Jin . Dual-parameter sensing of temperature and strain realized by two a-PSFBGs cascaded . | OPTICAL FIBER TECHNOLOGY , 2023 , 79 . |
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摘要 ：
In this work, core CdTe, core-shell CdTe/CdSe and alloy CdTeSe QDs are synthesized by aqueous solvent. TEM visually shows the rod-shaped core-shell structure with a transverse to longitudinal ratio of 6.5 and the ellipsoidal alloy structure with different crystal planes competing for growth. The XRD and Raman spectra of the three QDs illustrate the characteristics of the internal lattice structure. With the increase of reaction time, CdTe emission maximum (EM) shows a red shift of 84 nm. Stokes shift changes little, and full width half maximum (FWHM) increases slightly. Compared with the CdTe, the red shift of CdTe/CdSe EM is slowly first and then faster, with a total shift of 125 nm. Stokes shift increases obviously. The initial FWHM is larger than CdTe and the widening speed is gradually accelerated. The initial EM of CdTeSe is red shifted compared with CdTe, and the total red shift of EM is 72 nm. Stokes shift increases obviously. The initial FWHM is significantly wider than CdTe. FWHM first decreases and then increases with reaction time. CdTe shows obvious band edge exciton absorbance of photoluminescence excitation (PLE) spectrum between 356 nm and 400 nm. CdTe/CdSe shows double band edge exciton absorption at 354-373 nm and 401-436 nm due to wave function separated of core-shell structure. The PLE spectrum of CdTeSe shows an obvious upward trend at 306-373 nm due to high energy level nonradiation. The average lifetime of CdTe/CdSe increases by 53 ns compared with CdTe due to the spatially separated electrons and holes. The defect state of CdTeSe increases the proportion of fast delay, which is 2 ns shorter than the average lifetime of CdTe. The transition mechanism of core-shell indirect band gap and alloy direct band gap is explained according to the valence bands of each element shown by XPS and the simulation of energy band density of states. The thickness shell and the doping elements can be adjusted to provide rich variation in the optical properties. This provides a more definite direction for the applications of cadmium chalcogenide in the fields of photoelectric devices and biology. (C) 2022 Elsevier B.V. All rights reserved.
关键词 ：
Band gap engineering Band gap engineering Rod-shaped core/shell Rod-shaped core/shell Ellipsoidal alloy Ellipsoidal alloy Cadmium QDs Cadmium QDs Optical properties Optical properties
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| GB/T 7714 | Wang, Jin , Wang, Li , Su, XueQiong et al. Bandgap engineering of CdTe/CdSe rod-shaped core/shell and CdTeSe ellipsoidal alloy quantum dots with tunable and intense emission [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 920 . |
| MLA | Wang, Jin et al. "Bandgap engineering of CdTe/CdSe rod-shaped core/shell and CdTeSe ellipsoidal alloy quantum dots with tunable and intense emission" . | JOURNAL OF ALLOYS AND COMPOUNDS 920 (2022) . |
| APA | Wang, Jin , Wang, Li , Su, XueQiong , Chen, RuiXiang . Bandgap engineering of CdTe/CdSe rod-shaped core/shell and CdTeSe ellipsoidal alloy quantum dots with tunable and intense emission . | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 920 . |
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摘要 ：
一种封装集成一体的温度梯度增敏保偏光纤传感器，属于基于镀膜保偏光纤的多参量光纤传感器领域。在去掉涂覆层的保偏光纤包层表面通过脉冲激光沉积的方法镀近红外高透过率的ZnSe9 : Co1纳米薄膜，使得传输光能量更集中在光纤表面。在ZnSe9 : Co1纳米薄膜表面利用热蒸镀的方法镀银纳米薄膜，提高光纤的热膨胀系数。用PDMS填充毛细管封装镀膜保偏光纤，增加传感器整体热膨胀系数，最终实现温度梯度增敏的测量。
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| GB/T 7714 | 王丽 , 王进 , 苏雪琼 et al. 一种封装集成一体的温度梯度增敏保偏光纤传感器 : CN202210190316.6[P]. | 2022-02-28 . |
| MLA | 王丽 et al. "一种封装集成一体的温度梯度增敏保偏光纤传感器" : CN202210190316.6. | 2022-02-28 . |
| APA | 王丽 , 王进 , 苏雪琼 , 肖燃燃 , 成浩 . 一种封装集成一体的温度梯度增敏保偏光纤传感器 : CN202210190316.6. | 2022-02-28 . |
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摘要 ：
一种改变半导体材料PN型的制备方法，涉及半导体材料领域。将硒化锌掺杂半导体沉积到基底表面形成半导体薄膜，通过控制制备条件，达到控制基片上半导体薄膜PN型的目的。制备过程中选择使用脉冲激光沉积技术完成薄膜的制备，基片选择使用石英玻璃。本发明的半导体材料通过脉冲激光沉积法来制备的，采用如下技术方案实现：先采用固体反应烧结法制备ZnSe0.4 : Mo0.3 : Ga0.3陶瓷靶材，再采用脉冲激光沉积法制备ZnSe : Mo : Ga薄膜，通过控制不同的制备条件，得到不同PN特性的半导体薄膜。本发明结晶质量好、表面光滑，具有纳米结构，能够实现同一块靶材通过控制制备条件改变其薄膜的PN型的目的。
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| GB/T 7714 | 王丽 , 高东文 , 苏雪琼 et al. 一种改变半导体材料PN型的方法 : CN202210260057.X[P]. | 2022-03-16 . |
| MLA | 王丽 et al. "一种改变半导体材料PN型的方法" : CN202210260057.X. | 2022-03-16 . |
| APA | 王丽 , 高东文 , 苏雪琼 , 王进 . 一种改变半导体材料PN型的方法 : CN202210260057.X. | 2022-03-16 . |
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摘要 ：
The whispering gallery mode (WGM) microcavity has a high-quality factor and small mode volume, for the property of confining photons in a small volume for a long time, which enhances the light-matter interaction. Combining with quantum dots that act as gain medium, it can realize low-threshold and narrow-linewidth microlasers with excellent performance. However, achieving conventional whispering gallery mode lasers still requires complex preparation conditions. Here, we report a narrow linewidth whispering gallery mode lasing from all-inorganic perovskite quantum dots (CsPbBr3 QDs), illustrating facile and cost-effective properties. CsPbBr3 QDs with excellent properties were synthesized by hot injection method and used as gain media for lasers, and microspheres as optical resonators. The whispering gallery mode laser with a quality factor Q of 4791 and a narrow linewidth of 0.11 nm was obtained at room temperature. The WGM microlaser achieved by this paper could be a great application prospects in biotechnology.
关键词 ：
Transient absorption spectroscopy Transient absorption spectroscopy Whispering gallery mode laser Whispering gallery mode laser CsPbBr3 QDs CsPbBr3 QDs FDTD simulation FDTD simulation
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| GB/T 7714 | Yu, Huimin , Su, Xueqiong , Pan, Yong et al. Narrow linewidth CsPbBr3 perovskite quantum dots microsphere lasers [J]. | OPTICAL MATERIALS , 2022 , 133 . |
| MLA | Yu, Huimin et al. "Narrow linewidth CsPbBr3 perovskite quantum dots microsphere lasers" . | OPTICAL MATERIALS 133 (2022) . |
| APA | Yu, Huimin , Su, Xueqiong , Pan, Yong , Gao, Dongwen , Wang, Jin , Chen, Ruixiang et al. Narrow linewidth CsPbBr3 perovskite quantum dots microsphere lasers . | OPTICAL MATERIALS , 2022 , 133 . |
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摘要 ：
An effective method to improve optical properties of perovskite CsPbI3/Br3 is a long-term goal pursued by re-searchers, such as incorporating, mechanism changing and structure optimizing. However, two significant problems still facing challenges including the complex fabrication process and low modulation efficiency. To contribute these, a method of ionic liquid modulation with respect to the photoluminescence PL intensity and peak position was demonstrated. The micro-structure including the information of crystal and bond in MAPbBr3/ I3 soaking in C8H11F3N2O2 and C7H13N2 center dot BF4 was supported by x-ray diffraction XRD patterns and Raman spectrum. A cube-like shape and size distribution mostly in 600-950 nm was imaged by scanning electron mi-croscope. Then, compared with CsPbI3 before soaking in Hall measurement, the carrier concentration was improved about 46.1%, the mobility and resistivity were lowered around 39.2% and 40.2%, respectively. The modulation of intensity and peak position were confirmed by PL spectrum at room temperature. The absorption enhancement in excited state absorbs range was proved by transient absorption. Finally, the mechanism for optical modulation in this paper was systematically explained. The research method proposed in this paper can simplify the research process and improve the optical properties of the materials at the same time.
关键词 ：
Modulation Modulation Perovskite Perovskite Ionic liquid Ionic liquid TAS TAS
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| GB/T 7714 | Su, Xueqiong , Chen, Ruixiang , Pan, Yong et al. High optical modulation efficiency in perovskite CsPbI3/Br3 by ionic liquid ionization [J]. | OPTICAL MATERIALS , 2022 , 136 . |
| MLA | Su, Xueqiong et al. "High optical modulation efficiency in perovskite CsPbI3/Br3 by ionic liquid ionization" . | OPTICAL MATERIALS 136 (2022) . |
| APA | Su, Xueqiong , Chen, Ruixiang , Pan, Yong , Wang, Jin , Gao, Dongwen , Yu, Huimin et al. High optical modulation efficiency in perovskite CsPbI3/Br3 by ionic liquid ionization . | OPTICAL MATERIALS , 2022 , 136 . |
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摘要 ：
In this work, the surface of long-period fiber grating (LPFG) and polarization maintaining fiber (PMF) is functionalized based on the interaction between the resonance wavelength and external environment. LPFG coated with a 150 nm ZnSe/Co film is fixed on a hollow bracket, prestressed, and annealed many times. A highly sensitive liquid level sensor with adjustable sensitivity, an adjustable measurement range, and a high liquid level early warning is prepared. The waveguide layer controlled by humidity is constructed by filling poly(3,4-ethylenedioxythiophene)/poly(styrene sulfonate) (PEDOT/PSS) in a periodically etched PMF. The surface is coated with a poly(vinyl alcohol) (PVA) and carbon nanotube (CNT) composite polymer. After laser processing, a honeycomb porous film is obtained, and the humidity sensor with wavelength modulation is prepared. The pH-sensitive polymer is successively adsorbed on the surface of PMF coated with a 120 nm indium tin oxide (ITO) film by electrostatic self-assembly (ESA). Poly(allylamine hydrochloride) (PAH), poly(acrylic acid) (PAA), and poly(styrene sulfonate) (PSS) constitute a composite film with rapid deposition and high permeability that is covered with polyaniline/poly(methyl methacrylate) (PMMA) as the protective layer. After laser processing, a fluffy porous film structure is formed. The pH sensor is obtained and the preparation steps are greatly reduced. Finally, based on the wavelength division multiplexing (WDM) and multiwavelength matrix (MWM), the problem of crosstalk is solved. An integrated sensor is constructed to realize the simultaneous measurement of temperature, liquid level, humidity, and pH. It has been successfully applied to monitor the overall environment of a chemical waste liquid storage tank. The sensor has the advantages of remote monitoring, safety, efficiency, and labor-saving.
关键词 ：
real-time monitoring real-time monitoring optical fiber sensors optical fiber sensors highly integrated highly integrated composite films composite films multiparameter multiparameter
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| GB/T 7714 | Wang, Jin , Wang, Li , Su, XueQiong et al. Simultaneous Real-Time Measurements of Temperature, Liquid Level, Humidity, and pH by ZnSe/Co Nanostructure-Coated Polymer Films [J]. | ACS APPLIED NANO MATERIALS , 2022 , 5 (9) : 13612-13625 . |
| MLA | Wang, Jin et al. "Simultaneous Real-Time Measurements of Temperature, Liquid Level, Humidity, and pH by ZnSe/Co Nanostructure-Coated Polymer Films" . | ACS APPLIED NANO MATERIALS 5 . 9 (2022) : 13612-13625 . |
| APA | Wang, Jin , Wang, Li , Su, XueQiong , Xiao, RanRan , Gao, DongWen , Kang, Chen et al. Simultaneous Real-Time Measurements of Temperature, Liquid Level, Humidity, and pH by ZnSe/Co Nanostructure-Coated Polymer Films . | ACS APPLIED NANO MATERIALS , 2022 , 5 (9) , 13612-13625 . |
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摘要 ：
Miniaturization and integration of lasers have been a hot topic in recent years. Colloidal quantum dots (CQDS) can be used as laser gain media because of their high luminous efficiency and low threshold. Compact distributed Bragg reflector (DBR) combined with CQDs is used to construct micro laser. In this paper, CdTeSe/ZnS core-shell CQDs were prepared by aqueous synthesis. DBR was fabricated by magnetron sputtering using SiO2 and TiO2 through reasonable design of their thickness and repetition cycle number. CQDs were dropped on the surface of DBR to form a low-cost small-scale surface particle laser (SPL). The output emission of 770 nm and 824 nm dual wavelength laser is realized. The threshold is 11 mW/cm2 and the bandwidth is 1 nm. The micro integrated laser with high intensity and Narrow bandwidth near infrared emission has been completed.
关键词 ：
CdTeSe CdTeSe DBR DBR Dual-wavelength Dual-wavelength Micro laser Micro laser ZnS ZnS
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| GB/T 7714 | Wang, Jin , Su, Xue-Qiong , Gao, Dong-Wen et al. Near infrared dual wavelength micro surface particle laser [J]. | APPLIED SURFACE SCIENCE , 2021 , 562 . |
| MLA | Wang, Jin et al. "Near infrared dual wavelength micro surface particle laser" . | APPLIED SURFACE SCIENCE 562 (2021) . |
| APA | Wang, Jin , Su, Xue-Qiong , Gao, Dong-Wen , Chen, Rui-Xiang , Mu, Yun-Yun , Zhang, Xin-Ping et al. Near infrared dual wavelength micro surface particle laser . | APPLIED SURFACE SCIENCE , 2021 , 562 . |
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