The all conjugated polymer solar cell has the advantages of adjustable energy level of the receptor

wide absorption range and solution processing

and has become a development trend in the field of solar cells. Through the optimization of materials and device structure

the energy conversion efficiency of the device has exceeded 10%. Among them

the phase separation microstructure of the blend system is a key factor that restricts the further improvement of the photoelectric conversion efficiency of organic solar cells. In the blend system with crystalline components

due to the change of the phase behavior of the components themselves

the understanding and understanding of the relationship between crystallization and phase separation and the particularity of the phase separation mechanism of the crystallization system are more conducive to effective adjustment of the total The yoke polymer phase separation structure. Based on the traditional polymer phase separation theory and the classical theory of polymer crystallization

combined with the uniqueness of the conjugated polymer structure

this paper summarizes the phase separation structure characteristics and difficulties of the fully conjugated polymer blend system

focusing on thermodynamics and kinetics. The aspects describe the basic methods and principles of controlling the phase separation structure

and further improve the mechanism of phase separation of conjugated polymers.