| Abstract Scope |
Controlling thermal radiation using photonic structures holds important opportunities for energy and thermal applications. In this talk, I will discuss about my studies on controlling thermal radiation for radiative cooling and photonic refrigeration. First, I will discuss our work on using the cold outer space as a new thermodynamic resource. Specifically, I will describe a strategy to simultaneously use the space and the sun for sub-ambient daytime cooling and photovoltaic electricity generation. We experimentally demonstrated ~5˚C passive sub-ambient daytime radiative cooling and photovoltaic electricity generation, simultaneously and from the same area. The combined electricity saving from the cooling and photovoltaics can overcome a bare solar cell. Second, I will introduce our work on active photonic refrigeration by controlling the thermal photons in semiconductors. I will discuss how chemical potential of photon can be controlled to achieve active cooling. |