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微光机电系统

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Introduction to the laboratory

朱君,教授,博士,硕士生导师,博士生导师,国家基金委项目评审专家、科技部人才项目评审专家、教育部学位中心评审专家、Advanced Fiber Materials青年编委、《Journal of Advanced Dielectrics 》JAD青年编委、《机电工程技术》青年编委、《塑料工业》青年编委、《塑料科技》理事、FFrontiers in Physics的Review Editor Board、OSA Member(1297659)、光电材料器件网专家委员、中国电子学会高级会员、中国光学学会高级会员、第五届电气工程与自动化国际论坛编委委员;2022光电转换与太阳能电池材料发展论坛-专题召集人(组织委员)、邀请报告;2017中国首届智能世界大会 报告人,第三届微纳光学与光电子技术 报告人,澳大利亚阿德莱德大学、北京大学公派访问学者,获得了2017广西师范大学青年骨干教师成长支持计划,2018广西高校青年教师教学业务能力提升计划,2019广西高等学校千名中青年骨干教师培育计划等支持。2014年9月广西师范大学电子工程学院任教。以第一作者发表SCI收录论文50余篇,累计影响因子超过150;在技术推广应用方面,获批发明专利11项(第一发明人),,为培养面向社会需要电子信息类应用人才提供了基础。研究方向:微光机电系统中传感器件的研究,包括表面等离子共振传感器、光纤光栅传感系统以及光开关等。任硕导以来,独立培养已毕业研究生10名,其中获得国家奖学金4 人,获得广西区优秀毕业生1 人,获得优秀硕士毕业论文3人,毕业后4人考取双一流高校博士,国企单位1人,事业单位3人。独立指导的一名本科生被中科院大学推免录取。

课题组论文被《Optical Materials》录用

2024.2.2 由硕士研究生朱柏林完成的研究论文”Enhancing the Light Emission Efficiency of LEDs Based on Array of Ag Nanohollow Cylinders and SPR Theory”被《Optical Materials》录用!祝贺!

 

Abstract:The internal spontaneous emission and external light extraction efficiency have been key issues in the research on LEDs incorporating metal nanoparticles, particularly in terms of transmittance, which presents a series of challenges and less-than-satisfactory outcomes. In this study, we address this issue by proposing a new approach that combines periodic structures with metal surface plasmons. Specifically, we embed an array of Ag nanohollow cylinders above the quantum wells of the LED structure and investigate its impact on the light emission characteristics using the finite-difference time-domain (FDTD) method. By varying the height and radius ratio of the hollow cylinders, the internal spontaneous emission and external light extraction efficiency of the LED can be significantly enhanced. At h = 12 nm, r/R = 1:3, the internal spontaneous emission rate is enhanced by a factor of 3.64. Under the condition of r/R = 1:3, the internal quantum efficiency reaches 90% for h values of 3 nm, 6 nm, 9 nm, 12 nm, and 15 nm. The transmittance increases from 0.26 to 0.44 at h = 3 nm, r/R = 1:3, and the enhancement factor of light extraction efficiency also reaches 1.73. These research findings reveal that embedding a nano Ag hollow cylinder array structure above the active layer can significantly enhance the light emission efficiency of LEDs. The introduction of this structure effectively utilizes the surface plasmon resonance effects of metal nanoparticles and their coupling with the active layer. This provides an important theoretical reference for further improvement and optimization of metal nanostructure designs.

课题组论文被《Physica B: Condensed Matter》录用

2024.4.25 由硕士研究生邓春兰完成的研究论文”Performance of nanoparticle-enhanced thin-film solar cell with near-perfect absorption”被《Physica B: Condensed Matter》录用!祝贺!

 

Abstract:This study proposes a thin-film solar cell composed of periodic plasmonic titanium nanoparticles (Ti NPs) and indium phosphide (InP) thin films. By adjusting the size and position of plasma Ti NPs and combining with the transparent conductive layer ITO and anti-reflection layer SiO2, the parameters of InP thin film solar cells can be improved. The experimental results show that the average absorption rate reaches 96% in the wavelength range of 350-850 nm. The absorption rate reached 99.9% in multiple wavelength ranges. This study has successfully increased the short circuit current to 31.996mA/cm^2, power conversion efficiency (PCE) to 29.634% and open circuit voltage to 1.053V of InP thin film solar cells.

课题组论文被《 Physica Scripta》录用

2023.12.25 由硕士研究生潘哲完成的研究论文”Broadband THz Graphene Absorber with Graphene and Sensing of Trimethylglycine Concentration”被《Physica Scripta》录用!祝贺!

 

Abstract:This paper proposes a tunable broadband terahertz absorber based on metamaterial graphene. The absorber consists of a monolayer of graphene, a dielectric layer, and a metal reflection backing. By adjusting the applied bias voltage, the unique properties of graphene are utilized to control its Fermi level. Simulation results indicate that the absorber has an absorption rate exceeding 70% between 4.2-4.8 THz, with a maximum absorption rate reaching 99.99%, and a sensitivity of 740 GHz/RIU. Compared to similar studies, this structure has significant advantages in sensitivity. Due to the symmetry of the unit structure, the absorber is insensitive to the incident angle. We applied the absorber to trimethylglycine concentration. Experimental results show that the designed absorber can accurately identify the concentration of trimethylglycine solution, detecting concentrations as low as 0.5%.

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