Electron-Deficient Linkers in Giant Molecule Acceptors for Organic Solar Cells DOI
Huaiyan Jiang, Jianing Xu, Yanru Li

и другие.

ACS Applied Energy Materials, Год журнала: 2024, Номер 7(21), С. 10073 - 10080

Опубликована: Окт. 29, 2024

Giant molecule acceptors (GMAs) have gained considerable attention due to their exceptional device stability, repeatability, and high power conversion efficiency (PCE). In this work, we synthesized isomerized electron-deficient linkers (trans-ICI cis-ICI), containing two active methylenes, employed them design GMAs. These were then used synthesize A-DA′D-A type GMAs (DY-cis-ICI DY-trans-ICI) through a metal-free catalytic Knoevenagel condensation reaction, serving as an alternative the common Stille coupling method. Notably, nature of trans-ICI cis-ICI profoundly influenced molecular conformations GMAs, with DY-trans-ICI adopting dominant S-type conformation DY-cis-ICI C-type conformation. displays broader absorption spectra deeper LUMO energy levels compared DY-cis-ICI. The PCEs binary organic solar cells based on reach 14.50% 14.30%, respectively. This study highlights effectiveness promising building blocks for designing

Язык: Английский

Constructing Multiscale Fibrous Morphology to Achieve 20% Efficiency Organic Solar Cells by Mixing High and Low Molecular Weight D18 DOI Open Access
Nan Wei,

Jieni Chen,

Yetai Cheng

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(41)

Опубликована: Сен. 1, 2024

This study underscores the significance of precisely manipulating morphology active layer in organic solar cells (OSCs). By blending polymer donors D18 with varying molecular weights, a multiscale interpenetrating fiber network structure within is successfully created. The introduction 10% low weight (LW-D18) into high (HW-D18) produces MIX-D18, which exhibits an extended exciton diffusion distance and orderly stacking. Devices utilizing MIX-D18 demonstrate superior electron hole transport, improves dissociation, enhances charge collection efficiency, reduces trap-assisted recombination compared to other two materials. Through use nonfullerene acceptor L8-BO, remarkable power conversion efficiency (PCE) 20.0% achieved. methodology, integrates favorable attributes polymers, opens new avenue for enhancing performance OSCs.

Язык: Английский

Процитировано

53

Coplanar Dimeric Acceptors with Bathochromic Absorption and Torsion‐Free Backbones through Precise Fluorination Enabling Efficient Organic Photovoltaics with 18.63% Efficiency DOI Creative Commons
Wei Liu, Weiwei Wu, Aleksandr A. Sergeev

и другие.

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 20, 2025

Abstract Giant dimeric acceptors (GDAs), a sub‐type of acceptor materials for organic solar cells (OSCs), have garnered much attention due to the synergistic advantages their monomeric and polymeric acceptors, forming well‐defined molecular structure with giant weight high efficiency stability. In this study, first time, two new GDAs, DYF‐V DY2F‐V are designed synthesized OSC operation, by connecting one vinylene linker mono‐/di‐fluorinated end group on Y‐series monomers, respectively. After fluorination, both exhibit bathochromic absorption denser packing modes stronger intramolecular charge transfer effect torsion‐free backbones. Through precise DYF‐V‐based devices highest performance 18.63% among GDA‐based OSCs, outperforming its non‐fluorinated counterpart, DY‐V‐based ones (16.53%). Theoretical morphological results demonstrate that proper fluorination in strengthens intra/intermolecular interactions enhanced crystallinity, superior phase segregation, less energy disorder, which is beneficial fast exciton dissociation, rapid carrier transport, suppressed recombination. The work demonstrates GDAs rigid coplanar backbones effective broader photon harvesting, packing, robust stability OSCs.

Язык: Английский

Процитировано

2

Tailoring small-molecule acceptors through asymmetric side-chain substitution for efficient organic solar cells DOI Creative Commons

Lan Xie,

Dingding Qiu,

Xianghao Zeng

и другие.

Science China Materials, Год журнала: 2025, Номер 68(3), С. 860 - 867

Опубликована: Фев. 13, 2025

Язык: Английский

Процитировано

1

The Critical Isomerization Effect of Core Bromination on Nonfullerene Acceptors in Achieving High‐Performance Organic Solar Cells with Low Energy Loss DOI Open Access
Kerui Liu, Yuanyuan Jiang, Feng Liu

и другие.

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 30, 2024

Highly efficient nonfullerene acceptors (NFAs) for organic solar cells (OSCs) with low energy loss (E

Язык: Английский

Процитировано

7

Dipole Moment Modulation of Terminal Groups Enables Asymmetric Acceptors Featuring Medium Bandgap for Efficient and Stable Ternary Organic Solar Cells DOI Creative Commons
Bosen Zou,

Anhai Liang,

Pengbo Ding

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 64(3)

Опубликована: Сен. 9, 2024

Abstract This study puts forth a novel terminal group design to develop medium‐band gap Y‐series acceptors beyond conventional side‐chain engineering. We focused on the strategical integration of an electron‐donating methoxy and electron‐withdrawing halogen atom at benzene‐fused groups. combination precisely modulated dipole moment electron density groups, effectively attenuating intramolecular charge transfer effect, widening band acceptors. The incorporation these groups yielded two asymmetric acceptors, named BTP‐2FClO BTP‐2FBrO, both which exhibited open‐circuit voltage ( V oc ) as high 0.96 in binary devices, representing highest OC s among small molecule More importantly, BTP‐2FBrO exhibit modest aggregation behaviors molecular crystallinity, making them suitable third component mitigate excess PM6 : BTP‐eC9 blend optimize devices’ morphology. As result, optimized BTP‐2FClO‐based ternary organic solar cells (OSCs) achieved remarkable power conversion efficiency (PCE) 19.34 %, positioning it highest‐performing OSCs. Our highlights importance manipulating moments developing offers highly efficient for high‐performance

Язык: Английский

Процитировано

5

Boosting the Efficiency and Mechanical Stability of Organic Solar Cells Through a Polymer Acceptor by Reducing the Elastic Modulus DOI Creative Commons
Yan Wang, Han Yu, Dan Zhao

и другие.

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 13, 2025

Abstract Organic solar cells (OSCs) are regarded as one of the most promising flexible power sources due to their lightweight and properties, with improvement photovoltaic mechanical performance. To improve current density conversion efficiency (PCE), mPh4F‐TS (TS) PYSe2F‐T (PA) introduced into binary host, PM6/mPh4F‐TT (PM6/TT) third components. It is demonstrated that corresponding ternary devices, in both rigid achieved superior efficiencies (19.6%/17.7% for PM6/TT+TS, 19.2%/17.4% PM6/TT+PA) outperform counterparts (18.3%/16.4%). However, distinct differences performance observed between polymer acceptor small‐molecular (TS). The PM6/TT+PA significantly improved stability devices a lower elastic modulus 3.6 GPa, while PM6/TT+TS resulted opposite effect higher 5.5 GPa. Through in‐depth investigation, clear correlation modulus, crack density, active layer blends successfully established, revealing key role reducing enhancing OSCs. This study provides important guidance development high robustness.

Язык: Английский

Процитировано

0

Shamrock-shaped Nonfullerene Acceptors Containing Nonhalogenated End Groups for High-Voltage Organic Photovoltaics DOI

Fuli Xie,

Xiangyu Li, Zongtao Wang

и другие.

Dyes and Pigments, Год журнала: 2025, Номер 235, С. 112616 - 112616

Опубликована: Янв. 2, 2025

Язык: Английский

Процитировано

0

Cyano substituted stilbene-based polymers for OFETs: from p-type to n-type DOI
Kaizhou Gao, Cheng Wang, Kaikai Liu

и другие.

Dyes and Pigments, Год журнала: 2025, Номер unknown, С. 112685 - 112685

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

0

Advancing Organic Photovoltaics: the Role of Dipole Distance and Acidity in Perylene‐Diimide Electron Transport Layers DOI Open Access
Wanqing Zhang,

Xiaoman Ding,

Jie Lv

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 16, 2025

Abstract The electronic transport layer (ETL) based on perylene‐diimide (PDI) has been widely demonstrated for efficient organic solar cells (OSCs). However, the effect of ETL materials interfacial traps and energy losses remains understudied. This study investigates effects dipole distance PDINN interface defects using three specifically designed weak acidic with varying carboxyl hydroxyl group amounts. Among these, 3,5‐dihydroxybenzoic acid (2OH), moderate pH high distance, enhanced intermolecular forces PDINN. interaction boosted π–π stacking, ohmic contact active Ag electrode. P‐2OH film exhibited a higher more uniform potential distribution, suppressing charge recombination at interface, reducing trap density to 2.12 × 10 16 cm 3 , non‐radiative loss ∆E from 0.236 0.174 eV. Consequently, decreased 0.553 0.484 meV PM6: BTP‐ec9/P‐2OH device. Notably, decent PCE 19.1% is achieved (10 nm), it impressively power conversion efficiency (PCE) 16.4% when thickness up 50 nm. work underscores importance groups in regulating minimize offers insights developing thickness‐insensitive interlayers high‐performance OSCs.

Язык: Английский

Процитировано

0

Efficient Organic Solar Cells Enabled by Structurally Modified Quinoxaline-Based Small Molecule Acceptors with Brominated End Groups DOI
Wanting Yao, Xiaoyu Zhang, Zezhou Liang

и другие.

ACS Applied Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 11, 2025

Язык: Английский

Процитировано

0