Recently, Yu Xuefeng, a researcher at the Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, and Yang Ying, an associate professor of the School of Metallurgy and Environment at Central South University, and Xiao Si, associate professor of the School of Physics and Electronics, made progress in the application of black phosphorus photovoltaic devices. Related papers Black phosphorus quantum dots based photocathodes in wideband bifacial dye-sensitized solar cells Posted online "Advanced Materials".
As a direct band gap semiconductor material with a two-dimensional layered structure, black phosphorus, which exhibits excellent optical and electrical properties, is widely regarded as a new "super-material" in the semiconductor industry, optoelectronic devices, optical detection, biology Medicine and other fields show a huge potential application value. The team creatively applied black-phosphorus quantum dots of just a few nanometers in size to constructing photocathodes for dye-sensitized solar cells. Dye-sensitized solar cells have the advantages of low cost, simple process and environment-friendly, and the primary way to achieve high conversion efficiency of solar cells is to maximize the utilization of sunlight.
The team uses the near-infrared strong absorption and high photoelectric conversion ability of black phosphorous quantum dots to deposit the black phosphorous quantum dots on the surface of the porous conductive polyaniline film to prepare a photocathode capable of responding to infrared light and forming a complementary light absorption with the photoanode, The device's light absorption range extended to the visible - infrared band, which can be assembled into a double-sided into the solid-state dye-sensitized solar cells. The results of battery performance test show that the photocathode can fully utilize the low-energy infrared photons and deposit the photo-generated carrier concentration of the device, thus improving the photoelectric conversion efficiency of the solar cell by 20%. The research results show that the black phosphorus quantum dots in solar cells, photovoltaic devices and other fields of great potential for application.
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