O, S, and N Bridged Atoms Screening on 2D Conjugated Central Units of High‐Performance Acceptors DOI

Xiangjian Cao,

Zheng Xu, Ruohan Wang

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 6, 2025

Abstract Almost all of central cores in high‐performance acceptors are limited to the electron‐withdrawing diimide structure currently, which constrains further acceptor structural innovation greatly. Herein, oxygen (O), sulfur (S), and nitrogen (N) atoms adopted bridge 2D conjugated cores, yielding three platforms CH─O, CH─S, CH─N that differ by only two atoms. Because characteristic atomic outer electron configuration hybrid orbital orientation, O‐, S‐, N‐bridged display quite different conformations electronic properties, namely, dibenzodioxin (planar, non‐aromatic), thianthrene (puckered, non‐aromatic) phenazine aromatic), respectively. A systematic investigation discloses how core, especially its p‐π overlap between lone pair on O/S/N coterminous benzene planes, affect intrinsic photoelectronic properties for first time. Finally, CH─N‐based binary device affords highest fill factor 83.13% organic photovoltaics along with a first‐class efficiency 20.23%. By evaluating strictly controlled molecular comprehensively, work reveals potential uniqueness determining excellent photovoltaic outcomes acceptors.

Language: Английский

Exploring the Impact of Heavy Atom Substitutions (Se, Te) on the CB16-Based Non- Fullerene Acceptor for High-Performance Organic Solar Cells: DFT and TD-DFT Study DOI
Walid Taouali, K. Alimi

Journal of Fluorescence, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Language: Английский

Citations

0
Efficient non-fused electron acceptor with C-shaped molecular geometry for photovoltaic application DOI
Kaijun Yuan, Chaoyi Wang,

Lijiao Ma

et al.

Journal of Materials Chemistry A, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A novel non-fused acceptor, AC2, with a C-shaped geometry and 3D stacking property, was designed for organic solar cells. AC2 exhibits efficient charge transport reduced energy loss, which broadens the design prospects acceptors.

Language: Английский

Citations

0
Dual Side Chain Functionalization of Small Molecule Acceptors Affords High‐Performance Organic Solar Cells With Refined Blend Morphology DOI Creative Commons

Shinbee Oh,

Kihyun Bae,

Da-Hyun Jeong

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Abstract Regulating blend morphology in photoactive films is essential for enhancing the power conversion efficiency (PCE) of organic solar cells (OSCs). However, achieving precise control over remains a significant challenge due to difficulty simultaneously controlling thermodynamic and kinetic parameters that govern formation. In this study, series new small‐molecule acceptors (SMAs) employing dual side chain functionalization strategy designed incorporates trifluoromethyl (CF 3 ) phenyl (Ph) groups: SMA‐CH , SMA‐CF (with CF group), SMA‐Ph‐CF both groups). This approach successfully enables delicate tuning development high‐performance OSCs (PCE = 18.5%). enhances compatibility SMAs with hydrophobic D18 polymer donor, promoting formation intermixed donor/acceptor domains efficient charge generation. Meanwhile, improves SMA aggregation crystallinity, facilitating strong interconnected assembly transport. As result, binary based on D18:SMA‐Ph‐CF achieve significantly higher PCE 18.5%, compared 14.3% D18:SMA‐CH 16.5% D18:SMA‐CF OSCs. These results highlight importance optimizing

Language: Английский

Citations

0
Unveiling the Mysterious Structure Growth of 2D and 3D All‐Inorganic Perovskite Nanocrystals in Solution Phase Dynamically by Using Small‐Wide Angle X‐Ray Scattering Spectroscopy DOI

Kuan‐Chang Wu,

Je‐Wei Chang, Yi‐Chia Chen

et al.

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: May 3, 2025

Abstract Real‐time analysis of the structural formation 2D and 3D perovskites in solution is challenging due to sensitivity perovskite intermediates environmental conditions their rapid growth. Conventional techniques often require stringent sample preparation, limiting ability study dynamic behaviors solution. In this study, small‐ wide‐angle X‐ray scattering (SWAXS) employed analyze morphology dynamics nanostructures native colloidal state. Unlike previous studies that attribute CsPbI 3 degradation delta‐phase formation, SWAXS revealed preexisting Cs 7 Pb 6 I 19 nanosheets pristine solutions. situ tracked transformation these structures during recrystallization diluted Adding bis(trimethylsilyl)sulfide (TMS) disassembled nanosheets, while subsequent a poor solvent formed highly crystalline nanosheets. The aligned with crystal growth theory, TMS concentration playing critical role. Higher concentrations slowed recrystallization, promoting stable lattice enhanced crystallinity, resulting bright yellow emission. Conversely, lower accelerated causing damage high‐crystallinity This highlights importance controlling rates through optimize crystallinity optoelectronic properties perovskites, offering insights into improving performance.

Language: Английский

Citations

0
O, S, and N Bridged Atoms Screening on 2D Conjugated Central Units of High‐Performance Acceptors DOI

Xiangjian Cao,

Zheng Xu, Ruohan Wang

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 6, 2025

Abstract Almost all of central cores in high‐performance acceptors are limited to the electron‐withdrawing diimide structure currently, which constrains further acceptor structural innovation greatly. Herein, oxygen (O), sulfur (S), and nitrogen (N) atoms adopted bridge 2D conjugated cores, yielding three platforms CH─O, CH─S, CH─N that differ by only two atoms. Because characteristic atomic outer electron configuration hybrid orbital orientation, O‐, S‐, N‐bridged display quite different conformations electronic properties, namely, dibenzodioxin (planar, non‐aromatic), thianthrene (puckered, non‐aromatic) phenazine aromatic), respectively. A systematic investigation discloses how core, especially its p‐π overlap between lone pair on O/S/N coterminous benzene planes, affect intrinsic photoelectronic properties for first time. Finally, CH─N‐based binary device affords highest fill factor 83.13% organic photovoltaics along with a first‐class efficiency 20.23%. By evaluating strictly controlled molecular comprehensively, work reveals potential uniqueness determining excellent photovoltaic outcomes acceptors.

Language: Английский

Citations

0