| abstract |
The present invention provides a conjugated polymer donor material and its preparation method and application. The conjugated polymer donor material has the structure shown in formula I, wherein X is selected from fluorine atom or chlorine atom, R 1 is selected from C1-C5 alkyl group, and R 2 is selected from C6-C12 alkyl group , and n is selected from an integer from 5 to 1000. In the present invention, fluorine atoms or chlorine atoms are used for substitution at specific sites, and at the same time, the reasonable selection of alkyl chains is carried out, and the hole mobility of the obtained material is relatively high, up to 1.59× 10-3 cm 2 /Vs, and It can be well matched with the non-fullerene acceptor, has good solubility and solution processing performance, and the organic solar cell prepared by using the material has high energy conversion efficiency. |