The reporter learned from Shanghai University of Science and Technology that Chen Gang's group of the School of Materials of the university studied and prepared a two-dimensional color photonic crystal film based on organic-inorganic hybrid perovskite materials, and based on this, produced a color with good photoelectric conversion efficiency. Solar cell devices. Related research has been published in Nano Express.
As a special nanostructure, the inverse opal structure can effectively optimize the optical and electrical properties of the material; the film with inverse opal structure can form photonic crystals, thereby exhibiting many superior properties of the photonic crystal.
For the first time, researchers used the template-assisted spin coating method to prepare two-dimensional perovskite photonic crystal thin films with inverse opal structure of different nano-scale, perovskite types, and synthesis methods. Such films exhibit a rich color and a range of special properties that are different from those of intrinsic perovskite materials, such as band offsets. At the same time, the structures and optoelectronics of two-dimensional perovskite photonic crystal films were systematically studied by means of characterization of synchronous radiation surface grazing incidence x-ray diffraction, scanning electron microscopy, atomic force microscopy, ultraviolet-visible absorption spectroscopy, fluorescence spectroscopy, and reflection spectroscopy. performance. On this basis, the researchers further applied two-dimensional photonic crystal thin films as light-absorbing materials to perovskite solar cells, and successfully produced highly efficient and colorful color solar cell devices.
Experts said that such attempts are still the first time in related fields and provide a brand-new idea for the preparation of multi-functional perovskite photovoltaic devices. It is reported that related preparation methods have applied for national patents.
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