The invention belongs to the field of photoelectric materials, and specifically discloses a high-efficiency thick-film full-
polymer solar cell active layer material as well as a preparation method andapplication thereof. The
active layer material is a composition of
polymer donor P(BDT)a(TPD)b and
polymer acceptor PNDI2HD-T; and the preparation method comprises the following steps: firstly the Da-Ab type binary random
copolymer donor P(BDT)a(TPD)b based on benzodithiophene and thienopyrroledione is obtained by a random copolymerization method, the polymer donor P(BDT)a(TPD)b and the polymer
acceptor PNDI2HD-T are mixed, 2-methyltetrahydrofuran is added,
dissolution is performed under stirring, sieving treatment is performed, and therefore the polymer donor /
acceptor composition solution isobtained, that is, the full-
polymer solar cell active layer material. According to the method provided by the invention, a green
solvent is used for
dissolution, and the high-efficiency thick-film active layer composition P(BDT)5(TPD)4 / PNDI2HD-T is prepared without the need of post-treatment; the film thickness is up to 120 nm or more, and a device prepared based on such films has conversion efficiency of higher than 7% and shows high efficiency and thick film characteristics; and meanwhile,
environmental protection of the green
solvent and simplification of materials and processes are beneficial to commercial applications of full-polymer solar cells.