Progress in Polymer Science, Journal Year: 2023, Volume and Issue: 143, P. 101711 - 101711
Published: June 25, 2023
Language: Английский
Advanced Materials, Journal Year: 2021, Volume and Issue: 33(37)
Published: Aug. 2, 2021
Abstract Narrow‐bandgap n‐type polymers with high electron mobility are urgently demanded for the development of all‐polymer solar cells (all‐PSCs). Here, two regioregular narrow‐bandgap polymer acceptors, L15 and MBTI, electron‐deficient segments synthesized by copolymerizing dibrominated fused‐ring acceptors (FREA) distannylated aromatic imide, respectively. Taking full advantage FREA both show narrow bandgap mobility. Benefiting from more extended absorption, better backbone ordering, higher than those its regiorandom analog, L15‐based all‐PSC yields a power conversion efficiency (PCE) 15.2% when blended donor PM6. More importantly, MBTI incorporating benzothiophene‐core segment shows relatively frontier molecular orbital levels L15, forming cascade‐like energy level alignment Based on this, ternary all‐PSCs designed where is introduced as guest into PM6:L15 host system. Thanks to further optimal blend morphology balanced charge transport, PCE improved up 16.2%, which among highest values all‐PSCs. The results demonstrate that combining an imide construct provides effective approach fabricate highly efficient
Language: Английский
Citations
175
Journal of Materials Chemistry A, Journal Year: 2022, Volume and Issue: 10(7), P. 3255 - 3295
Published: Jan. 1, 2022
This review presents the recent progress in organic solar cells based on non-fullerene acceptors, with a wide coverage from material synthesis and processing to interface engineering, device structure, large-area fabrication, stability.
Language: Английский
Citations
171
Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(7), P. 3945 - 3953
Published: Jan. 1, 2021
The
ternary
all-small-molecule
organic
solar
cells
deliver
a
top-ranked
power
conversion
efficiency
of
16.28%,
benefiting
from
the
rational
compatibility
in
the
Language: Английский
Citations
154
Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(29), P. 15935 - 15943
Published: May 3, 2021
Abstract All‐polymer solar cells (all‐PSCs) progressed tremendously due to recent advances in polymerized small molecule acceptors (PSMAs), and their power conversion efficiencies (PCEs) have exceeded 15 %. However, the practical applications of all‐PSCs are still restricted by a lack PSMAs with broad absorption, high electron mobility, low energy loss, good batch‐to‐batch reproducibility. A multi‐selenophene‐containing PSMA, PFY‐3Se, was developed based on selenophene‐fused SMA framework selenophene π‐spacer. Compared its thiophene analogue PFY‐0Se, PFY‐3Se shows ≈30 nm red‐shifted increased improved intermolecular interaction. In all‐PSCs, achieved an impressive PCE 15.1 % both short‐circuit current density 23.6 mA cm −2 fill factor 0.737, which among best values reported date much better than PFY‐0Se (PCE=13.0 %). Notably, maintains similarly properties for realizing reproducible device performance, is first also very rare PSMAs. Moreover, PFY‐3Se‐based show dependence area (0.045–1.0 2 ) active layer thickness (110–250 nm), indicating great potential toward applications.
Language: Английский
Citations
148
Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(47)
Published: Oct. 29, 2021
Abstract Side‐chain modifications of non‐fullerene acceptors (NFAs) are essential for harvesting their full potential in organic solar cells (OSC). Here, an effective alkyl‐chain‐branching approach the Y‐series NFAs flanking meta‐substituted phenyl side groups at outer positions is demonstrated. Compared to BTP‐4F‐PC6 with linear m ‐hexylphenyl chains, two new named BTP‐4F‐P2EH and BTP‐4F‐P3EH developed bulkier alkyl chains branched β γ positions, respectively. These result altered molecular packing afford higher open‐circuit voltage devices. Despite blue‐shifted absorption branched‐chain NFAs, blends PBDB‐T‐2F enable improved short‐circuit current density corresponding devices owing more suitable phase separation better exciton dissociation. Consequently, OSCs based on yield enhanced device performance 18.22% 17.57%, respectively, outperforming BTP‐4F‐PC6‐based ones (17.22%). results highlight that side‐chain branching design has great optimizing properties promoting photovoltaic performance.
Language: Английский
Citations
143
Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 15(1), P. 320 - 333
Published: Oct. 6, 2021
A synergistic hetero-dihalogenated terminals strategy was systematically employed for the first time to enhance single-crystal packing, boosting device performance of a Y-BO-FCl:PM6 with remarkable PCE 17.52%.
Language: Английский
Citations
139
Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 428, P. 129276 - 129276
Published: March 12, 2021
Language: Английский
Citations
127
Journal of Materials Chemistry A, Journal Year: 2021, Volume and Issue: 9(11), P. 6797 - 6804
Published: Jan. 1, 2021
The PCEs of OSCs and AVTs corresponding blend films can be continuously optimized by adjusting D18-Cl:Y6-1O ratios introducing Y6 as the third component. 13.02% PCE 20.2% AVT are achieved in semitransparent ternary OSCs.
Language: Английский
Citations
125
Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(25)
Published: May 2, 2021
Abstract In this paper, a difluoro‐monobromo end group is designed and synthesized, which then used to construct novel polymer acceptor (named PY2F‐T) yielding high‐performance all‐polymer solar cells with 15.22% efficiency. The fluorination strategy can increase the intramolecular charge transfer interchain packing of previous PY‐T based acceptor, significantly improve photon harvesting mobility resulting acceptor. addition, detailed morphology investigations reveal that PY2F‐T‐based blend shows smaller domain spacing higher purity, suppress recombination as supported by time‐resolved techniques. These properties enable simultaneously enhanced J SC FF devices, eventually delivering device efficiencies over 15%, outperforming devices on non‐fluorinated (13%). More importantly, active layers be processed under ambient conditions still achieve 14.37% They also using non‐halogenated solvent o ‐xylene (no additive) yield decent performance 13.05%. This work demonstrates success in design acceptors, provide guidelines for developing new all‐PSCs better stabilities commercial applications.
Language: Английский
Citations
114
Advanced Materials, Journal Year: 2022, Volume and Issue: 34(14)
Published: Jan. 29, 2022
The power conversion efficiencies (PCEs) of small molecule acceptor (SMA)-based organic solar cells have already exceeded 18%. However, the development polymer acceptors still lags far behind their SMA counterparts mainly due to lack efficient acceptors. Herein, a series named PY-X (with X being branched alkyl chain) are designed and synthesized by employing same central core with L8-BO but different chains on pyrrole motif. It is found that molecular packing SMA-HD featuring 2-hexyldecyl side chain used in synthesis PY-HD similar L8-BO, which lead condensed high-order assembly molecules. When combined PM6, PY-HD-based all cell (all-PSC) exhibits high PCE 16.41%, representing highest efficiency for binary all-PSCs. Moreover, side-chain modification site position further improves performance all-PSCs, PY-DT-based device delivers new record 16.76% (certified as 16.3%). work provides insights understanding structure-property relationship paves feasible avenue develop conjugated
Language: Английский
Citations
109