[21p-C601-1~23] 12.5 Organic and hybrid solar cells

3:30 PM - 3:45 PM JST(6:30 AM - 6:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[21p-C601-8] Additive effect on charge generation in nonfullerene-based polymer solar cells

〇(M2)Momoko Urano¹, Jihun Jeon¹, Hyung Do Kim¹, Hideo Ohkita¹ (1.Kyoto Univ.)

Keywords:

nonfullerene-based polymer solar cells,additive,exciton

Herein, we discuss the relationship between charge generation and aggregation states of nonfullerene acceptor (NFA) molecules in PM6/L8-BO solar cells fabricated with different fractions of 1,8-diiodeoctane (DIO) additive. As a result, we found that short-circuit current density (J_SC) increased, reached a maximum at 0.25%, and then slightly decreased with increasing DIO contents. On the other hand, exciton lifetime increased with increasing DIO contents and PL exciton quenching efficiency also decreased. Thus, the decrease in J_SC is mainly ascribed to the decrease in the quenching efficiency.