Bulk heterojunction organic photovoltaic cells based on D–A type BODIPY small molecules as non-fullerene acceptors

Journal of Materials Chemistry C, Journal Year: 2022, Volume and Issue: 10(35), P. 12776 - 12788

Published: Jan. 1, 2022

The power conversion efficiency of PBDB-T:CF3-BDP-Cz is 13.07%, which higher than that for PBDB-T:CF3-BDP-TPA, linked to the more appropriate nanoscale phase separation exciton dissociation and charge transport.

Language: Английский

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Achieving High‐Efficiency in Binary Organic Solar Cells by the Structural Fine‐Tuning of Coumarin‐Based Donor

Solar RRL, Journal Year: 2023, Volume and Issue: 7(10)

Published: March 2, 2023

The choice of molecular material plays a crucial role in improving the performance organic solar cells. Herein, two coumarin‐based small molecules are designed and synthesized which π‐system is extended by introduction double bonds. differed attachment central acceptor units. replacement carbonyl group C3 dicyanomethylene unit C3–CN red‐shift absorption, reduced energy gap, stabilized highest occupied orbital lowest unoccupied levels. When blended with complementary absorbing all‐fused F13, binary devices using donor delivered power conversion efficiency (PCE) 11.09%. In contrast, C3–CN:F13‐based device displayed an impressive PCE 14.84% due to obvious increase all open circuit voltage, short current density, fill factor values. inclusion CN backbone induces tighter intermolecular packing, beneficial for charge transport properties. study demonstrates that subtle modification conjugation length tuning level proper could be promising way improve device's performance.

Language: Английский

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Reinforcing Bulk Heterojunction Morphology through Side Chain-Engineered Pyrrolopyrrole-1,3-dione Polymeric Donors for Nonfullerene Organic Solar Cells

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Organic solar cells (OSCs) are attracting significant attention due to their low cost, lightweight, and flexible nature. The introduction of nonfullerene acceptors (NFAs) has propelled OSC development into a transformative era. However, the limited availability wide band gap polymer donors for NFAs poses critical challenge, hindering further advancements. This study examines role developed halogenated pyrrolo[3,4-c]pyrrole-1,3(2H,5H)-dione (PPD)-based polymers, in combination with Y6 acceptor, bulk heterojunction (BHJ) OSCs. We first focus on electronic absorbance modifications brought about by halogen substitution PPD-based revealing how these adjustments influence HOMO/LUMO energy levels and, subsequently, photovoltaic performance. Despite increased V oc polymers optimal alignment, power conversion efficiencies (PCEs) were decreased suboptimal blend morphologies. second implemented PPD as solid additive PM6:Y6, forming ternary OSCs improving PCE. provides nuanced understanding interplay between molecular design, device morphology, performance opens insights future research achieve an balance alignment favorable morphology high-efficiency

Language: Английский

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Strategies to achieve efficiencies of over 19% for organic solar cells

Cell Reports Physical Science, Journal Year: 2025, Volume and Issue: 6(1), P. 102390 - 102390

Published: Jan. 1, 2025

Language: Английский

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Strategies and Mechanisms To Minimize Energy Loss in Non-Fullerene Bulk Heterojunction Organic Solar Cells: Experimental and Computational Approaches

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Language: Английский

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