Fig. 2: Time-resolved optical properties.
From: The role of interfacial donor–acceptor percolation in efficient and stable all-polymer solar cells
a, b Transient absorption (TA) spectroscopy results for PM6:Y6 (a) and PM6:PY-IT (b) blended films, both excited at 750 nm. Additional TA results including data for pristine films and blends in the near-infrared regions can be found in the Supplementary Information. c Time-resolved photoluminescence (TRPL) data of Y6, PY-IT, PYF-T-o and PY-V-γ films, all excited at 720 nm. d TRPL data of PY-IT dispersed in polyvinylcarbazole (PVK) with various acceptor weight fractions, all excited at 680 nm. Similar results for PYF-T-o and PY-V-γ are found in Supplementary Information. e Exciton lifetime comparison on PVK-dispersed acceptors with various acceptor weight fractions.
