Results 171 to 180 of about 19,723 (254)

Non‐fullerene acceptor aggregation regulation via additives dipole moment leads to 19.9% power conversion efficiency in bilayer organic solar cells

open access: yesFlexMat, EarlyView.
Additives interact with non‐fullerene acceptors to modulate their aggregation behavior and molecular orientation via optimizing crystallization kinetics. The optimized morphology effectively suppresses charge carrier recombination and enhances charge transport. Notably, 2‐chloro‐1,3‐dibromobenzene with the dipole moments of 2.56 D enables the PM6/L8‐BO
Jingjing Zhao   +8 more
wiley   +1 more source

Reverse evolution of fluorine and side chains in bisisoindigo‐based copolymers enabling electron mobility exceeding 7 cm2·V−1·s−1

open access: yesFlexMat, EarlyView.
Abstract We report the design and synthesis of a series of bisisoindigo‐based donor–acceptor (D–A) copolymers, P4F18, P4F10, P2F18, and P2F10. By reverse evolution of fluorine substitution and side‐chain structure, we effectively tuned the frontier molecular orbital energy levels, intermolecular interactions, molecular self‐assembly, and thus charge ...
Keli Shi   +11 more
wiley   +1 more source

Strategies reimagined: SDG-driven solutions for combating global desertification. [PDF]

open access: yesProc Natl Acad Sci U S A
Wang X   +37 more
europepmc   +1 more source

The role of additives in the film formation kinetics of active layers in organic solar cells: From in situ characterization to mechanistic elucidation

open access: yesFlexMat, EarlyView.
This review highlights the critical regulatory role of liquid and solid additives in the film formation kinetics of organic solar cells (OSCs) active layer. Real‐time in situ characterization technology techniques (in situ UV‐Vis, PL, GIWAXS, and GISAXS) are utilized to monitor the dynamic solution‐to‐solid transformation, revealing how additives ...
Yuanwei Zhao   +8 more
wiley   +1 more source

Regulating secondary phase of Rb‐based aggregates for efficient and stable perovskite solar cells

open access: yesFlexMat, EarlyView.
By introducing RbAc into the precursor solution, the crystallization pathway is optimized, excessive lead iodide is eliminated, grain size increases, and defects are passivated in the perovskite films. The obtained perovskite devices exhibit improved power conversion efficiency and operational stability. Abstract Passivating defects in perovskite films
Weiyuan Chen   +7 more
wiley   +1 more source

Assessment of African grassland sustainability for livestock use by constructing a carrying capacity alert index. [PDF]

open access: yesNat Commun
Yu S   +10 more
europepmc   +1 more source

Meniscus‐guided organic semiconductor single crystals: From fluid dynamics to morphology control and multifunctional applications

open access: yesFlexMat, EarlyView.
Centered on the multiscale meniscus, this review dissects mass transport in meniscus‐guided coating into parallel and lateral components. By analyzing the balance of multiple factors during crystallization, it establishes a clear morphology‐performance relationship.
Yumeng Wang   +7 more
wiley   +1 more source

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