Photoelectric conversion is a process of directly converting solar radiation energy into electric energy through photovoltaic effect. The principle of this process is that photons transfer energy to electrons, making them move and forming current. There are two ways to solve this process, the most common is to use solid devices with silicon as the main material, and the other is to use photosensitive dye molecules to capture the energy of photons. After absorbing photon energy, dye molecules will separate negatively charged electrons from positively charged holes in semiconductors.
Among many solar cells, there are three kinds of solar cells, namely monocrystalline silicon solar cells, polycrystalline silicon solar cells and amorphous silicon solar cells, whose main function is to convert light energy into electric energy. This phenomenon is called photovoltaic effect. Photovoltaic effect was discovered in19th century. It was used to make selenium photovoltaic cells in the early days, until the invention of transistors, semiconductor characteristics and related technologies gradually matured, making it possible to make solar photovoltaic cells.
Recently, the research group of Professor Tan Hairen from School of Modern Engineering and Applied Science of Nanjing University and scholars from Oxford University in the United Kingdom used coating printing, vacuum deposition and other technologies to realize the preparation of large-area all-perovskite laminated photovoltaic modules for the first time in the world, which opened up a new path for the mass production and commercialization of large-area perovskite laminated batteries.
Certified by the international authoritative third-party testing organization, the stable photoelectric conversion efficiency of this module is as high as 2 1.7%, which is the highest efficiency of perovskite photovoltaic modules in the world. This achievement was included in the latest issue of the Solar Cell World Record Table, and related achievements were recently published in the international authoritative academic journal Science.