Recently, Professor Huang Xuan, a team professor of South China University of Technology, teamed up with Huang Fei to develop a translucent thin film solar cell with both power generation and heat insulation effects. This type of battery film not only has high efficiency of photoelectric conversion, but also its thermal insulation effect. It is also extremely excellent. Studies have shown that this solar cell film, which has both power generation and heat insulation effects, can theoretically save households by more than 50% of their electricity consumption, and is expected to significantly increase the energy efficiency of household electricity. Related research has recently been published. In the magazine "Joule" in the United States.
The team innovatively selected a narrow band gap non-fullerene receptor with an absorption edge extending to 900 nm as a key component for capturing near-infrared light in the light absorbing layer. The absorption of near-infrared photons not only produces solar cells. Additional photocurrent, while also giving this battery device thermal insulation.
In addition, the ultra-thin metal silver electrode also has a reflective effect on infrared light, which can help re-reflect some of the near-infrared light back to the light-absorbing layer, further enhancing the photoelectric conversion efficiency and heat insulation effect of the device. In order to absorb as much as possible using near-infrared light. , can also add optical control layer after the silver electrode.
Ye Xuanli, a professor at the State Key Laboratory of Luminescent Materials and Devices at South China University of Technology, said that they make organic photovoltaic materials a translucent, lightweight film that makes glass a generator and a thermal insulator. Adjusted from 75% to 90%, comparable to the high quality solar film in the market.
The team uses the high refractive index material and the low refractive index material to alternately deposit to form an optically controlled microcavity, which can further reduce the infrared light transmittance while maintaining the visible light transmittance of the whole device, thereby enhancing the solar cell device again. The thermal insulation effect of the film.
In addition, under low-intensity illumination, the photoelectric conversion efficiency of this film is higher, so it is expected to use the indoor lighting at night to generate considerable electric energy. The researchers say that this functional material is still in the early stage of development, but it is expected to be organic photovoltaic. The application of materials opens up new space.
