Proper post-processing of thin-film solar cells is one of the important means to improve the performance of thin-film solar cells. As a common post-processing process, the annealing process can greatly improve the crystallinity of thin-film materials, remove defects, adjust phase composition, etc. , thereby improving the photoelectric conversion rate and stability of thin-film solar cells.

Impact on perovskite thin film solar cells

    Perovskite thin film solar cell is a solar cell that uses perovskite material as the absorber layer. The solar cell has the characteristics of high absorption coefficient, long carrier lifetime, adjustable wide band gap, etc. However, the stability of the solar cell is relatively low. Poor, easily affected by temperature, humidity, light and other factors and degraded. Therefore, the annealing process can help perovskite films greatly improve their crystallization quality and stability. The return process can promote the precursor reaction and crystallization of perovskite through high-temperature treatment, improve its grain size and uniformity, thereby improving the photoelectric conversion rate of perovskite thin film solar cells.

Impact on crystalline silicon thin film solar cells

    Crystalline silicon thin film solar cell is a solar cell that uses a crystalline silicon film as an absorber layer. Its advantage is that it has similar photoelectric properties to crystalline silicon solar cells, but the cost is lower. The disadvantage is that the crystal quality of the crystalline silicon film is poor, resulting in There are many defects, short carrier lifetime, low efficiency and other problems. Therefore, annealing the crystalline silicon film is an effective method to improve its performance. The annealing process can optimize the lattice structure of the crystalline silicon thin film through high-temperature treatment, improve the light transmittance and electrical conductivity of its surface, thereby improving the photoelectric conversion rate of the crystalline silicon thin film solar cell. The annealing process can also adjust the composition and doping concentration of the crystalline silicon film by changing the atmosphere or adding dopants, thereby improving its electrical properties and stability.