The market size of crystalline silicon solar cells is expanding day by day. With the increasing shortage of fossil fuels and increasing environmental protection requirements, solar cells are becoming more and more popular. In 2017, my country's new photovoltaic installed capacity reached 53.06GW, a year-on-year increase of 53.62%. In recent years, with the widespread application of distributed photovoltaics, photovoltaic installed capacity has ushered in new growth points, and the industry has developed rapidly. The overall revenue was 200.22 billion yuan, an increase of 27% compared with 2016. Solar cells can be divided into crystalline silicon solar cells, gallium arsenide solar cells, dye sensitized solar cells, thin film solar cells, etc. Crystalline silicon solar cells have a market share of more than 90% of the solar cell market and will maintain a steady growth trend in the next five years. Crystal silicon solar cells cannot effectively utilize the full spectrum energy. The optimal response range of crystal silicon solar cells is near-infrared light with a wavelength of 900-1100nm, and the response efficiency for visible light and ultraviolet light below 750nm is low. However, the fact that solar spectral energy is mainly distributed in the visible region limits the effective use of solar energy by crystalline silicon solar cells. If the low-wavelength part of the solar spectrum can be "converted" into near-infrared light, then the photoelectric conversion efficiency will surely be improved. This technical solution can effectively improve the photoelectric conversion efficiency of crystalline silicon solar cells. There is no other similar solution as shown in the figure. EVA glue film is filled between the glass, chip, and back plate of crystalline silicon solar cells. Its main characteristics are high transparency, high adhesion, strong insulation, and stable properties, so it can be used as a filler for crystal silicon battery chip protection, fixing and protecting the chip without affecting light transmittance. The core point of this technology is to add the rare earth nanomaterial YAB/SiO2 independently developed by the laboratory to the traditional EVA adhesive film. This material is a near-infrared micro-nano luminescent material with a light gray appearance and strong absorption in the ultraviolet light region. The excitation wavelength is between 350nm and 650nm, and the emission spectrum is between 950 and 1100nm. The material is evenly dispersed on the EVA film to obtain a near-infrared light conversion EVA film, which can realize the wavelength conversion of incident light from the sun. After many application tests, this method can effectively increase the photoelectric conversion efficiency of crystalline silicon solar cells by about 1%, and can also improve the aging properties of EVA films and effectively extend the service life of EVA films. At the same time, it will not affect the inherent properties of EVA film. The products of this project are widely used in the market, and are now seeking industrialization cooperation.(1) At present, the pulverization and film-making and dispersion technologies have passed small test certificates, and there has been 50-kilogram pulverization practice. The technology is mature and can be fully industrialized. However, it is necessary to cooperate with manufacturers with production capacity to further increase production, and there are currently no production conditions. (2) This technology has a wide application space. In addition to being used for EVA film modification, such rare earth nano luminescent materials can also be dispersed in materials such as glass, transparent resins, transparent ceramics and other materials to play an equal role. The technical team has developed a series of similar nanoluminescent materials that can be used in different scenarios that require wavelength conversion of incident light. A similar method has been used in mulch films to promote plant photosynthesis, with remarkable results. (3) Technical teams tend to directly transfer technology to partners or cooperate in application research and development. If partners are worried about issues such as technology absorption and iteration, the technical party is willing to become the partner's technical consultant on a hiring basis, cooperate for a long time, and continuously develop new products and applications.