18.01% Efficiency organic solar cell and 2.53% light utilization efficiency semitransparent organic solar cell enabled by optimizing PM6:Y6 active layer morphology

Template molecular weight-dependent PEDOT surface energy: impact on the photovoltaic performance of bulk-heterojunctions

“…Impressively, the 17.21% PCE is among the highest efficiencies of single-junction PM6:Y6 binary OSCs. 40,41 When the AIM M PSS W further increases to 1000 KDa, synchronously decreased V oc , J sc and FF are obtained, thus lowering the PCE to 16.84% for the P-1000 device. These findings highlight the importance of M PSS W as a crucial factor for high-performance PEDOT:PSS AIMs.…”

Tuning the Crystallinity and Phase Separation by Two‐Step Annealing Enables Block Copolymer‐Based Organic Solar Cells with 15% Efficiency

“…Current device optimization for this type of active layer stops at utilizing solvent additive and TA, [ 26 ] without considering another traditional yet effective method called solvent vapor annealing (SVA). [ 25–33 ] To be specific, SVA method can break initial crystallites and phase separation at the first stage and then rebuild the crystallites and domains in a new way (normally a better connected network), [ 28 ] and when coping with TA treatment, the device efficiency can be even higher. [ 30 ] This suggests that two‐step annealing (SVA + TA) could bear hope of the further improved PCE.…”

“…Current device optimization for this type of active layer stops at utilizing solvent additive and TA, [26] without considering another traditional yet effective method called solvent vapor annealing (SVA). [25][26][27][28][29][30][31][32][33] To be specific, SVA method can break initial crystallites and phase separation at the first stage and then rebuild Block copolymer-based organic solar cells (OSCs) possess better stability than their binary all-polymer counterparts; thus, promoting the power conversion efficiency (PCE) of them to a higher level would be meaningful to achieving a higher level of efficiency-stability balance. Herein, two-step annealing combining solvent vapor and thermal annealing (TA) upon cast films is deployed and 15% efficiency for block copolymer PM6-b-PY-IT-based OSCs is realized, which appeals to the level of traditional binary all-polymer solar cells.…”

Contributions of Charge Generation Versus Transport to Photocurrent in Dilute-Donor Organic Solar Cells with Non-fullerene Acceptors

“…Their chemical structures are shown in Figure . The choice of Y6 is motivated by the excellent device performance Yao et al reported for 10 wt % PM6 in Y6 and the high power conversion efficiency (PCE) of PM6:Y6 bulk heterojunction (BHJ) OSCs, 13.5–17.9%. − PM6:IT-4F BHJ OSCs also have high PCE values, 12.9–14.4%, − but IT-4F has different absorption and transport properties from Y6; thus, comparing Y6- and IT-4F-based DDOSCs will elucidate the role of the NFAs. We examine charge generation, transport, and collection based on experiments and numerical simulations.…”