【mTT2024】邀请报告人——​Junsuk Rho

学术   2024-11-17 19:42   北京  

mTT2024

会议时间:2024年11月23日-24日
会议地点:北京市·中国科技会堂

会议网站:http://mtt2024.csmnt.org.cn



Junsuk Rho


Prof. Rho is a Mu-Eun-Jae (无垠斋) Endowed Chair Professor and Young Distinguished Professor at Pohang University of Science and Technology (POSTECH), Korea, with a joint appointment in the Department of Chemical Engineering, the Department of Mechanical Engineering, and the Department of Electrical Engineering. He received his Ph.D. at the University of California, Berkeley (2013), M.S. at the University of Illinois, Urbana-Champaign (2008) and B.S. at Seoul National University, Korea (2007) all in Mechanical Engineering. Prof. Rho has authored and co-authored more than 300 high-impact journal papers including Science and Nature. He is also the recipients of several notable honors and awards such as US Department of Energy Argonne Named fellowship (2014), Korean Presidential Early Career Award for Scientists and Engineers (2019), Elsevier MEE/MNE Young Investigator Award and Lectureship (2020), Member of the Young Korean Academy of Science and Technology (Y-KAST) (2020), Associate Member of the National Academy of Engineering of Korea (NAEK) (2022), Fulbright Visiting Scholar Fellowship (2022), Northwestern Simpson Fellowship (2022), Northwestern Eshbach Fellowship (2023), Clarivate Highly Cited Researcher (2023). He serves 13 editorial positions including Light: Science and Applications (Springer-Nature), Microsystems and Nanoengineering (Springer-Nature), npj Nanophotonics (Springe-Nature) and Nanophotonics (De Gruyter).
报告摘要
With the ever-increasing consciousness of the energy crisis and global warming issues, passive cooling methods that use free and renewable energy sources have been pursued recently [1-2]. Radiative cooling is an efficient passive cooling strategy that dissipates excessive heat to the universe through thermal radiation. In particular, all-day passive radiative cooling has offered an even larger spectrum of energy-saving applications by suppressing solar absorptivity under solar irradiation. In this talk, we present our recent research progress on all-day passive radiative cooling for practical applications as well as for improved cooling performance. Firstly, we discuss the inverse design of daytime radiative cooling for high performance [3]. The design of a selective multilayer emitter was optimized by a genetic algorithm, and we achieved highly suppressed solar absorption, thereby, high-performance radiative cooling under direct sunlight. We also discuss inverse design of colored daytime radiative coolers using deep neural networks. Methods for achieving on-demand color generation with high NIR reflectance are developed [4]. We then discuss the efforts to promote the implementation of radiative cooling for real-world applications. We first discuss the realization of all-day radiative cooling devices on a large scale to address practical issues [5-7]. By using silica-coated porous anodic aluminum oxide, we developed a centimeter-scale radiative cooling device demonstrating a maximum cooling of 6.1 °C below ambient during the daytime [5]. We also developed large-scale radiative cooling devices in particle mixture coating format [6]. By further analyzing the effect of each particle on radiative cooling performance, we report a large-scale paint-format radiative cooling device with high performance [7]. Such particle-based devices allow the use of facile one-step and cost-effective fabrication methods, providing the potential for large-scale production and applications. Finally, we present radiative cooling devices with practical functionalities, including transparency [8] switchability [9] and multifunctionalities. We discuss a transparent radiative cooling device that transmits visible light reflects near-infrared light and radiates thermal energy to lower the temperature during the daytime while maintaining transparency [8]. Such a transparent can be used for eco-friendly cooling windows in vehicles or buildings. We further discuss our recent development on visibly transparent radiative cooling windows specialized for enclosed space cooling using Janus emitters. We also developed a neutral-colored transparent radiative cooler that optimizes both visible transparency and solar reflection using a punctured Ag layer. Additionally, by exploiting the changeable material properties of vanadium dioxide in response to temperature, we achieved a temperature-adaptive radiative cooling device that radiates thermal energy only when the temperature is above the phase transition temperature [9]. Lastly, all-weather sustainable windows integrating triboelectric nanogenerator and transparent radiative cooler for both energy saving and harvesting as well as the transparency-enhanced radiative cooling devices are discussed [10,11].

References

  • [1]So, S. et al., Advanced Science, 2024, 11, 2305067.
  • [2]Ko, B. et al. Energies, 2019, 12, 89.
  • [3]So, S. et al., Nanophotonics, 2022, 11, 2107-2115.
  • [4]Keawmuang, H. et al., Solar Energy Materials and Solar Cells, 2024, 271, 112848.

  • [5]Lee, D. et al., Nano Energy, 2021, 79, 105426.
  • [6]Chae, D. et al., ACS Applied Materials and Interfaces, 2021, 13, 21119-21126.

  • [7]Yun, J. et al., ACS photonics, 2023, 11, 2608–2617.
  • [8]Kim, M. et al., Advanced Optical Materials, 2021, 9, 2170047.

  • [9]Kim, M. et al., Opto-Electronic Advances, 2021, 4, 200006. 
  • [10]Lee, G. et al., Nature Communications, 2024, 15, 6537.

  • [11]Ko, B. et al., Advanced Functional Materials, 2024, 34, 2410613





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联系方式




mTT2024会务组联系方式

【汇款发票】张佳惠13521268028

【日程安排】冯晓娜18110073557

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