< BK21+ BEST Seminar Series Announcement> 

Time and Date : 16:00 ~ 17:00 Monday 02/03/2020

Place : D406, Engineering Building #4

Title : Coloration and cooling strategies for wearable device applications
Abstract:
Passive cooling requires no electricity which provides oppotunities to solve problems associated with the global energy crisis. The key behind this is releasing heat directly to the outer space. In this point of view efficient radiative cooling is realized by using efficient selective emitters (SE) that radiate heat through the atmospheric transparency window. For daytime cooling, broadband solar reflectors are also required to minimize heat generation from the solar power.
Recent advances in passive radiative cooling enable daytime cooling via tailored photonic designs [1-4]. However, the use of these daytime radiative coolers is restricted owing to their non-aesthetic appearance resulted from strong solar reflection. Here, we introduce a colored passive radiative cooler (CPRC) capable of generating potential cooling power. This CPRC not only selectively emits infrared wave through the atmospheric transparency window but also displays subtractive primary colors (i.e., cyan, magenta, and yellow) to exhibit the desired appearance. Successful demonstration of cooling/coloring behavior with wearable electronic devices under solar irradiation represents a major step forward in the field of temperature-sensitive, flexible, wearable electronic/optoelectronic devices.

Presenter: Prof. Song, Youngmin / GIST

Host: Prof.Lee, Taeyoon, Yonsei EEE