Enhancement of Circularly Polarized Light Detection Through Ortho‐Substitution in Chiral Perylene Diimides DOI
Zhenping Li,

Xianfeng Shen,

Wenkai Zhao

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

Abstract Chiral organic small molecules are promising for circularly polarized light (CPL) detection due to their easy modifiability, strong intermolecular interactions, and straightforward manipulation of the transition dipole moments. However, they often exhibit a low absorption asymmetry factor ( g abs ) since magnetic moment m is overshadowed by electric μ ), alignment θ not optimized, limiting performance CPL photodetectors. This study introduces an ortho ‐substitution strategy significantly enhance in chiral perylene diimides (PDIs) tuning crystal packing motif. Incorporating cyano group at ortho‐position markedly reduces angle between within crystal, thus amplifying . The fabricated single‐crystal film devices R )‐4CN‐PDI‐Ph demonstrated superior photodetecting performance, with photocurrent ph 0.362 — three times larger than that its counterpart )‐4PH‐PDI‐Ph. These findings underscore pivotal role molecular stacking, enhancing detection, deepening understanding structure‐performance relationship optoelectronics.

Language: Английский

Dimerized small-molecule acceptors with electron withdrawing linker for efficient organic solar cells DOI

Jianan Niu,

Mingxin Sun,

Fuzhen Bi

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160416 - 160416

Published: Feb. 1, 2025

Language: Английский

Citations

1
Rational Design of Two Well‐Compatible Dimeric Acceptors Through Regulating Chalcogen‐Substituted Conjugated Backbone Enable Ternary Organic Solar Cells with 19.4% Efficiency DOI

Wanying Feng,

Yuyang Bai, Jia Wang

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 12, 2024

Abstract To enhance the performance of dimeric acceptors (DMAs) based organic solar cells (OSCs), two new DMAs, designated as DC9‐HD and DYSe‐3, are rationally developed employed to fabricate ternary OSCs. The substitution sulfur atom on outer ring fused‐ring core with a selenium resultes in red‐shifted DYSe‐3. Despite these minor differences, DYSe‐3 possess nearly identical conjugated skeletons, which contribute their similar packing motifs crystallinities, ultimately enabling high degree miscibility between DMAs. Upon incorporating into host PM6:DC9‐HD binary blend, fibril‐like morphologies featured diameters ≈16.9 nm reduced charge recombination observed PM6:DC9‐HD:DYSe‐3 blend. More importantly, owing long exciton diffusion lengths low voltage losses, remarkable power conversion efficiency 19.4% is achieved for OSCs, alongside delicate balance open‐circuit short‐circuit current density. This super result comparable best oligomer acceptor OSCs reported date. Furthermore, proposed strategy, combines one polymer donor well‐compatible not only retains advantages DMAs but also offers streamlined approach fabricating high‐performance

Language: Английский

Citations

6
Giant Molecule Acceptors for High Performance Polymer Solar Cells DOI Creative Commons

Hongmei Zhuo,

Beibei Qiu, Xiaojun Li

et al.

Giant, Journal Year: 2024, Volume and Issue: 20, P. 100336 - 100336

Published: Aug. 23, 2024

Language: Английский

Citations

4
Dimeric Small Molecule Acceptors via Terminal‐End Connections: Effect of Flexible Linker Length on Photovoltaic Performance DOI Open Access
Zhengkai Li, Qingyuan Wang, Qi Chen

et al.

Macromolecular Rapid Communications, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 3, 2024

Abstract The dimerization of small molecule acceptors (SMAs) holds significant potential by combining the advantages both SMAs and polymer in realizing high power conversion efficiency (PCE) operational stability organic solar cells (OSCs). However, advancements selection innovation dimeric linkers are still challenging enhancing their performance. In this study, three new acceptors, namely DY‐Ar‐4, DY‐Ar‐5, DY‐Ar‐6 synthesized, linking two Y‐series SMA subunits via an “end‐to‐end” strategy using flexible spacers (octyl, decyl, dodecyl, respectively). influence spacer lengths on device performance is systematically investigated. results indicate that DY‐Ar‐5 exhibits more compact ordered packing, leading to optimal morphology. OSCs based PM6: achieves a maximum PCE 15.76%, attributes enhance balance carrier mobility, reduce recombination. This suitable non‐conjugated units provides rational principle for designing high‐performance non‐fullerene acceptors.

Language: Английский

Citations

4
Asymmetric Acceptors with Benzotriazine Central Core Achieving 19.63% Efficiency in Organic Solar Cells DOI
Quanhong Han,

Wendi Shi,

Wenkai Zhao

et al.

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

Published: April 21, 2025

Abstract Decreasing the symmetry of acceptors can enhance molecular dipole moment, influence intermolecular packing and has been proven to be an efficient strategy improve device performance. This study presents a new asymmetric design develop beyond conventional end group or side chain engineering. Specifically, unit, 1,2,4‐benzotriazine, is introduced as central core in Y‐series acceptors. Additionally, monophenyl with without fluorine, are substituted on core. combination yields two acceptors, H‐1 H‐2F, both which exhibit large moments strong interactions. Consequently, organic solar cells (OSCs) based D18:H‐1 D18:H‐2F achieved high power conversion efficiencies (PCEs) 18.56% 18.85%, respectively. By incorporating BO‐4Cl into blend, ternary remarkable efficiency 19.63% due extended absorption improved morphology. work establishes easily modifiable highlights advantages demonstrates their potential OSCs.

Language: Английский

Citations

0
Functionalized π-Bridges in Dimerized Acceptors Enable High-Performance Organic Solar Cells DOI
Xiangyu Shen,

Waqar Ali Memon,

Hanjian Lai

et al.

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 111085 - 111085

Published: May 1, 2025

Language: Английский

Citations

0
Rationalizing Star‐Shaped Nonfullerene Acceptors in Ternary Organic Solar Cells: Morphology Mediation Facilitates Exciton and Carrier Dynamics DOI
Zhiyuan Wu, Weiyi Wang, Hui Qian

et al.

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

Published: May 7, 2025

Abstract Star‐shaped trimeric acceptors have garnered increasing attention in organic solar cells (OSCs), yet a mechanistic gap exists on regulation of morphology and carrier dynamics. Herein, nonfullerene acceptor named BTF‐Trimer bearing benzotrifuran core with more electronegative oxygen atoms is newly designed, which fosters intermolecular interactions both polymer donors small‐molecule acceptors. possesses reduced aggregation tendencies high glass transition temperature, are conducive to inhibiting excessive phases stabilizing film morphology, respectively. Notably, as mediator strengthened host donor‐acceptor compatibility ternary blend active layers, forming dual‐fibril interpenetrating networks that promoted exciton dissociation hole transfer well alleviated bimolecular recombination devices. Consequently, the power conversion efficiency T 70 (the time required reach 70% initial efficiency) lifetime OSCs an Ar atmosphere achieved 19.13% ≈2800 h, This study highlights distinctive merits star‐shaped suppress over‐crystallization enhance phase continuity, offering insights into interplay phase‐separated dynamics, plays critical role

Language: Английский

Citations

0
Correlation of Dimer-Linker-Induced Conformational Lock with Nonradiative Energy Loss in Organic Solar Cells DOI
Huanhuan Gao, Baobing Fan, Liyang Yu

et al.

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(11), P. 5541 - 5549

Published: Oct. 25, 2024

The efficiencies of dimer-based devices still lag those their small molecule-based counterparts. This is primarily due to the considerable dihedrals in dimer skeleton, which compromises molecular packing, thus influencing charge generation and nonradiative voltage loss (ΔVoc,nr). Herein, we developed two dimeric acceptors with varied π-linkers investigate influence linker-induced conformational lock on ΔVoc,nr. We find that helically lapped O-shaped delivers better intermolecular packing than planar S-shaped one incorporates a bulkier π-linker. However, its skeleton instead more favorable for forming compact ordered stacking host acceptor ternary blend. possibly promotes exciton dissociation, reducing decay excited states. Moreover, longer lifetime could offer additional charge-transfer channels. These contributions effectively minimize ΔVoc,nr 0.195 eV, while delivering high efficiency approaching 20% derived device.

Language: Английский

Citations

3
Selenization Strategy of Phenazine‐based Non‐Fullerene Acceptors Promotes Photon Harvesting and Reduces Voltage Loss in Organic Solar Cells DOI

Xiyun Li,

Ruixiang Peng,

Yi Qiu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 26, 2024

Abstract Phenazine‐based small molecular acceptors (SMAs), which benefit from the reduced energy loss ( E ), have emerged as promising candidates for achieving high‐efficiency organic solar cells (OSCs). Nevertheless, potential advancements of phenazine‐based photovoltaic devices are hindered by constrained short‐circuit current J sc ). Though incorporation selenium (Se) atoms has been proven effective in enhancing , it simultaneously introduces disorder stacking and charge recombination. Based on desire to harness full phenazine structure benefits Se substitution, a series Se‐substituted SMAs, namely PzIC‐SSe‐4F PzIC‐SeSe‐4F meticulously synthesized. Due increased photon harvesting capabilities, device using demonstrated significantly 27.73 mA cm −2 . Remarkably, PzIC‐SeSe‐4F‐based displayed an astonishing open circuit voltage V oc ) 0.873 V, representing highest recorded among all reported symmetric Y‐series SMAs‐based devices. Thanks synergistic effect central cores PM6:PzIC‐SeSe‐4F‐based achieves power conversion efficiency (PCE) 17.69%. The findings serve pivotal reference further development

Language: Английский

Citations

2
Regulation of Side‐Chain Symmetry for Delaying Triplet Formation and Suppressing Non‐Radiative Loss in Organic Solar Cells DOI
Huanhuan Gao, Qian Li, Baobing Fan

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 27, 2024

Abstract The structural revolutions of non‐fullerene acceptors (NFAs) have driven continuous efficiency breakthroughs in organic solar cells (OSCs). Rational regulation NFA structures toward efficient exciton dissociation and mitigated non‐radiative recombination is pivotal for OSCs. incorporation asymmetric side chains on NFAs can often achieve these goals by inducing a desirable aggregate state. However, it lacks the studies to directly correlate side‐chain symmetry with delocalization triplet dynamics Herein, influence properties systematically investigated exciton/charge based two developed biaxial‐conjugated varied symmetry. symmetric having diverse molecular packing orientations form multiple charge transfer channels its blend polymer donor, which cannot be found that comprising ones. Moreover, slower rate lower ratio spin‐triplet state are formed NFA, resulting much voltage loss corresponding This study reveals distinct advantages both over those ones, paving way developing high‐performance OSCs using easier‐to‐prepare, low‐cost materials.

Language: Английский

Citations

1