High absorption broadband solar energy device and thermal emitter based on titanium metamaterials

As the energy crisis gradually becomes the main cause of global conflict, the utilization of solar energy is imperative for the well-being of the planet. Regarded as a renewable energy source by the scientific community, solar energy has become one of the most important areas of future energy exploration. This paper proposes a solar absorber design based on Ti with fractal geometry. The device is designed to optimize solar energy utilization, thereby achieving higher efficiency. It exhibits over 90 % absorption across the 446.5–2479.5 nm wavelength range, with a weighted average absorption rate of 92.47 % under AM1.5 conditions. The device also exhibits favorable thermal radiation characteristics, achieving…

• NS
  Natural Science Foundation of Fujian Province

  Awards: 2022J011102, 2022H0048