Enhance Photo‐Stability of Up‐Scalable Organic Solar Cells: Suppressing Radical Generation in Polymer Donors DOI Open Access

Mengfei Xiao,

Chen Wang, Yujie Xu

et al.

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

Published: Dec. 9, 2024

The power conversion efficiency (PCE) of single-junction organic solar cells (OSCs) has been promoted above 20%. Device up-scaling draws more and research attentions. Besides the high PCE for devices with up-scalable fabrication methods conditions, achieving stability simultaneously is essential pushing industrialization this technology. Here, state-of-the-art OSCs blade-coated in air non-halogenated solvents a wide thickness range thoroughly investigated. losses short-circuit current density under photo-thermal stress strongly depend on processing conditions. Devices less crystalline phases unit show faster generation trap states hence reduced charge collection efficiency. Through in-depth photo-chemical, photo-physical, morphological characterizations during ageing, radicals PM6 active layers amorphous structures identified as cause device degradation. Increasing crystallinity layer films suppressing radical polymer donors critical to enhance processed range.

Language: Английский

Tailoring Cyano Substitutions on Quinoxaline‐based Small‐Molecule Acceptors Enabling Enhanced Molecular Packing for High‐Performance Organic Solar Cells DOI
Li Chen, Chaoyue Zhao, Han Yu

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(30)

Published: May 11, 2024

Abstract Cyanation is a common chemical modification strategy to fine‐tune the energy levels and molecular packing of organic semiconductors, especially materials used in solar cells (OSCs). Generally, cyanation modify end groups high‐performance small‐molecule acceptors (SMAs). However, has not been investigated on central backbone SMAs, which could introduce stronger intermolecular interaction enhance π–π stacking for rapid charge transport. This paper, first time, reports new benzo‐quinoxaline core synthesizes two novel A‐DA'D‐A type named BQx‐CN BQx‐2CN, with mono‐ di‐cyanide groups, respectively. Through tailoring number CN BQx‐CN‐based OSC exhibits best device performance 18.8%, significantly higher than non‐cyano BQx‐based one. The reason superior devices can be attributed fine‐tuned level, packing, ideal phase segregation, lead exciton dissociation, faster transport, suppressed recombination, therefore highest fill factor (FF) power conversion efficiencies (PCE). research demonstrates effectiveness SMAs enhanced better OSCs.

Language: Английский

Citations

23
Elucidate the Thermal Degradation Mechanism of Y6‐Based Organic Solar Cells by Establishing Structure‐Property Correlation DOI
Jingming Xin, Chao Zhao,

Ziqi Geng

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(30)

Published: May 14, 2024

Abstract Organic solar cells (OSCs) achieved performance booming benefiting from the emerging of non‐fullerene acceptors, while inadequate device stability hampers their further application. At present, prevalent belief attributes inevitable thermal degradation OSC to morphological instability caused by excessive phase separation and crystallization in active layer during operation. However, it is inapplicable for state‐of‐art Y6‐based devices which strongly degrade before large‐scale morphology change. Herein, an alternative mechanism elucidated wherein molecular orientation change demixing induced devices. Distinct IT‐4F‐based counterpart, suffer severe dominated open‐circuit voltage ( V OC ) fill factor FF losses. The loss attributed transition polymer donors edge‐on face‐on, leading a strong built‐in potential reduction increase non‐radiative due energy level shifting. As decay, discontinuous acceptor phases result electron mobility decrease over orders magnitude, originating increased stacking separation. This work reveals correlates photoelectric properties with instability, will offer guidance improving high‐performance OSCs.

Language: Английский

Citations

23
Organic solar cells based on molecular perylene diimides-type nonfullerene acceptors: achievements, challenges and the future DOI Creative Commons
Xiang Gao, Xiaojian Wu, Zhenyu Wu

et al.

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Language: Английский

Citations

3
Rhodanine Substitution of Asymmetric Nonfullerene Acceptors for High-Performance Organic Solar Cells DOI
Qingbin Li, Yang Bai, Shuai Jiang

et al.

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

Published: Jan. 29, 2025

Asymmetric substitution is acknowledged as a straightforward yet potent approach for the optimization of small molecule acceptors (SMAs), thereby enhancing power conversion efficiency (PCE) organic solar cells (OSCs). In this work, we have successfully engineered and synthesized novel asymmetric SMA, designated Y6-R, which features rhodanine-terminated inner side-chain. devices with PM6 polymer donor, Y6-R demonstrated an impressive PCE 18.62% open-circuit voltage (Voc) 0.863 V, short-circuit current (Jsc) 27.89 mA cm-2, fill factor (FF) 77.35%, much higher than that symmetric SMA Y6-based (16.84%). The superior performance PM6:Y6-R can be attributed to combination factors, including upshifted LUMO energy levels, more desired exciton dissociation, collection, extraction capability, well reduced recombination suppressed Eloss. addition, molecules promote coaggregation behaviors along endowing stronger ordered crystallinity blend films. Our findings underscore effectiveness rhodanine-substitution, representative "A" units, SMAs in fine-tuning behavior efficiency.

Language: Английский

Citations

2
Chlorine‐Mediated Dispersion Modulates Packing Arrangement of Asymmetric Acceptors for High‐Performance Organic Solar Cells DOI Open Access
Hanjian Lai, Yongwen Lang, Yongmin Luo

et al.

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

Published: Feb. 5, 2025

Abstract This study focuses on the synthesis and performance of non‐fullerene acceptors (NFAs) with varying chlorine dispersion in organic solar cells (OSCs). Four chlorine‐mediated acceptors, BO3Cl‐ a , γ β BOEH3Cl‐ are synthesized isomeric terminal groups then integrated donor PBDB‐TF to fabricate OSCs. It finds that increased improves device efficiency enhanced current ‐based devices achieving power conversion (PCE) over 19%, which is one highest values reported for asymmetrically chlorinated acceptors. In OSC devices, Enhanced exciton dissociation reduced carrier recombination observed more dispersion, along improved charge transport due modulation molecular packing active layer. Furthermore, transient absorption spectroscopy elucidates augments diffusion time, thereby elevating density while branching strategy further amplify lifetime preserving value short face spectral blue shifts it. The findings suggest key factor enhancing by progressive arrangement aggregation behaviors.

Language: Английский

Citations

2
A systematic investigation on pyridine derived solid additives inducing fibrillar morphology for highly efficient organic solar cells with over 20 % efficiency DOI Creative Commons
Kai Chen,

Weixu Duan,

Lang Zhou

et al.

Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 164, P. 100977 - 100977

Published: March 18, 2025

Language: Английский

Citations

2
Deuteration-enhanced neutron contrasts to probe amorphous domain sizes in organic photovoltaic bulk heterojunction films DOI Creative Commons
Guilong Cai, Yuhao Li, Yúang Fu

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: March 30, 2024

Language: Английский

Citations

15
How can we improve the stability of organic solar cells from materials design to device engineering? DOI Creative Commons
Mingpeng Li, Leilei Tian, Feng He

et al.

Aggregate, Journal Year: 2024, Volume and Issue: 5(5)

Published: April 22, 2024

Abstract Among a promising photovoltaic technology for solar energy conversion, organic cells (OSCs) have been paid much attention, of which the power conversion efficiencies (PCEs) rapidly surpassed over 20%, approaching threshold potential applications. However, device stability OSCs including storage stability, photostability and thermal remains to be an enormous challenge when faced with practical The major causes instability are rooted in poor inherent properties light‐harvesting materials, metastable morphology, interfacial reactions highly sensitive external stresses. To get rid these flaws, comprehensive review is provided about recent strategies methods improving from active layers, engineering encapsulation techniques high‐performance OSC devices. In end, prospectives next stage development devices satisfactory long‐term afforded community.

Language: Английский

Citations

15
Understanding photochemical degradation mechanisms in photoactive layer materials for organic solar cells DOI Creative Commons
Jianhua Han, Han Xu, Sri Harish Kumar Paleti

et al.

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(14), P. 7426 - 7454

Published: Jan. 1, 2024

Over the past decades, field of organic solar cells (OSCs) has witnessed a significant evolution in materials chemistry, which resulted remarkable enhancement device performance, achieving efficiencies over 19%. The photoactive layer OSCs play crucial role light absorption, charge generation, transport and stability. To facilitate scale-up OSCs, it is imperative to address photostability these electron acceptor donor materials, as their photochemical degradation process remains challenge during photo-to-electric conversion. In this review, we present an overview development emphasizing aspects chemical stability behavior that are linked OSCs. Throughout each section, highlight pathways for link degradation. We also discuss existing interdisciplinary challenges obstacles impede photostable materials. Finally, offer insights into strategies aimed at enhancing future directions developing photo-active layers, facilitating commercialization

Language: Английский

Citations

15
Advances in Blue Energy Fuels: Harvesting Energy from Ocean for Self‐Powered Electrolysis DOI

Il Woo Ock,

Junyi Yin,

Shaolei Wang

et al.

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

Published: May 22, 2024

Abstract 70% of the earth's surface is covered by ocean, and it represents a promising renewable clean energy reservoir that waits for further exploration. Although hydrogen (H 2 ) boasts high density 143 MJ kg −1 environmentally friendly attributes, widespread commercialization green H production remains formidable challenge. With huge amounts water, ocean presents an opportunity generating fuel through process seawater electrolysis. This review introduces ocean‐driven, self‐powered blue conversion devices, including triboelectric nanogenerators (TENGs), magnetoelastic generators (MEGs), solar cells. They are able to convert from water waves, wind, energy, into electricity on‐site seawater‐splitting generation. systematically reports this compelling approach introducing fundamental principles devices showcasing practical applications. Additionally, aiming promote future research in field sustainable also delves development novel harvesting systems with efficiency large‐scale effective production.

Language: Английский

Citations

14