English

Beijing Institute of Technology has made significant progress in the study of ultrafast carrier dynamics in optoelectronic functional crystals

989
2024-02-21 14:08:27
See translation

Recently, teachers and students from the Institute of Solid State Laser and Ultrafast Photonics at the School of Physics and Optoelectronic Engineering have made significant progress in the study of ultrafast carrier dynamics in optoelectronic functional crystals. The related research results are titled "Anisotropic carrier dynamics and laser fabricated luminosity patterns on oriented single crystal perovskite wafers" and published online in the international authoritative journal Nature Communications, The research results are of great significance for promoting the practical application process of functional crystals in the field of optoelectronics.

The first author of the paper is Beijing University of Technology, with Ge Chao, an assistant researcher at the School of Physics and Optoelectronic Engineering, and Li Yachao, a doctoral student, as co first authors. Ge Chao, an assistant researcher at Beijing University of Technology, and Song Haiying, an associate researcher, are co corresponding authors. Professor Zhang Wenkai from Beijing Normal University and Professor Liu Yang from Shandong University are also co corresponding authors. This study has been supported by projects such as the National Natural Science Foundation of China and the Beijing Municipal Education Commission Research Program.

In recent years, perovskite materials and their applications in the field of optoelectronics have attracted widespread attention. However, a deep understanding of their anisotropic behavior in ultrafast carrier dynamics is still insufficient. To compensate for this deficiency, the research team, based on high-quality MAPbBr3 single crystal wafers with different orientations, for the first time revealed the polarization of photo excited charge carriers within crystal planes with different orientations and the anisotropic dynamic evolution between crystal planes at the picosecond time scale. This discovery provides a deeper understanding of the relaxation pathways of ultrafast charge carriers from a crystallographic perspective, which is of great significance for exploring and expanding the applications of perovskite single crystals in the field of ultrafast optoelectronics, such as light modulators, high-speed polarization sensors, and ballistic transistors.

In addition, by using femtosecond laser two-photon processing technology, the research team successfully prepared three orders of magnitude fluorescence enhanced luminescent patterns. An in-depth analysis of the fluorescence enhancement mechanism from the perspectives of multidimensional space (bulk and micro/nanoscale) and time (steady-state and transient) provides a convenient top-down strategy for improving the photoluminescence intensity of bulk crystals. This study provides a profound understanding of the ultrafast carrier dynamics of MAPbBr3 from a crystallographic perspective, with the hope of providing more guidance for the orientation selection and utilization of perovskite hot carriers in optoelectronics in the future.

The dynamic evolution of photo excited charge carriers on the (100), (110), and (111) crystal planes of MAPbBr3 and the mechanism of femtosecond laser-induced fluorescence enhancement.

Source: OFweek

Related Recommendations
  • The Science Island team has made new progress in detecting atmospheric formaldehyde

    Recently, Zhang Weijun, a research team of the Anguang Institute of the Chinese Academy of Sciences, Hefei Academy of Materials, made new progress in atmospheric formaldehyde detection, and the related achievements were published on the international TOP journal Sensors and Actors: B. Chemical under the title of "Portable highly sensitive laser absorption spectrum formaldehyde sensor based on comp...

    2023-09-21
    See translation
  • Monport enhances K40 laser cutting machine through air assisted technology

    Monport Laser has launched its latest breakthrough innovative product, the Monport 40W Pro CO2 laser engraving machine, with air assistance. This cutting-edge machine has set a new standard for precision carving, providing excellent performance and a series of upgraded functions. The Monport 40W Pro surpasses its predecessor, the Monport 40W Laser, in all aspects, making it a game-changing solutio...

    2023-10-11
    See translation
  • Coherent's first global manufacturing center in India will focus on the development, production and service of lasers, optical networking components and systems

    Coherent, a global laser giant, has signed a tripartite cooperation agreement (MoU) with the Indian Institute of Technology Madras Research Park (IIT MRP) and Guidance Tamil Nadu Investment Promotion Centre.Coherent will establish its first global Manufacturing Centre (CoE) for laser applications at IIT Madras Research Park, which will focus on R&D, production and services for lasers, optical ...

    2023-09-07
    See translation
  • Monport Laser's grand anniversary event ignited a boom in laser engraving industry

    Monport Laser, a leading manufacturer of laser engraving machines, is pleased to announce an exciting anniversary on its website. The event will mark the anniversary of Monport Laser and offer customers a range of exclusive offers and promotions. The event will highlight Monport Laser's commitment to innovation, customer satisfaction and the magic of laser engraving.The Monport Laser Anniversary...

    2023-08-04
    See translation
  • The largest ultra fast laser production base in the northwest has been completed and put into operation

    As a representative enterprise in the field of ultrafast lasers, Zhuolai Laser has always performed outstandingly in the market, not only possessing dual technologies of "ultrafast+ultra strong", but also covering a remarkable range of technical routes in China. In 2022, the company completed a financing of 200 million yuan.Recently, Zhuolai Laser announced to the public that its Xi'an subsidiary ...

    2024-04-28
    See translation