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

Advantages, challenges and molecular design of different material types used in organic solar cells DOI
Jicheng Yi, Guangye Zhang, Han Yu

et al.

Nature Reviews Materials, Journal Year: 2023, Volume and Issue: 9(1), P. 46 - 62

Published: Dec. 15, 2023

Language: Английский

Citations

157
High‐Reproducibility Layer‐by‐Layer Non‐Fullerene Organic Photovoltaics with 19.18% Efficiency Enabled by Vacuum‐Assisted Molecular Drift Treatment DOI
Yongchao Xie, Chunyu Zhou, Xiaoling Ma

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(11)

Published: Jan. 28, 2024

Abstract The thin film deposition engineering of layer‐by‐layer (LbL) non‐fullerene organic solar cells (OSCs) favors vertical phase distributions donor:acceptor (D:A), effectively boosting the power conversion efficiency (PCE). However, previous strategies mainly aimed at optimizing morphology LbL films, and paid limited attention to reproducibility device performance. To achieve high performance maintain reproducibility, a strategy for hierarchical manipulation in OSCs is developed. A series devices are fabricated by introducing vacuum‐assisted molecular drift treatment (VMDT) donor or acceptor layer individually simultaneously elucidate functionalities this treatment. Essentially, VMDT provides an extended driving force manipulate molecules, resulting well‐defined distribution ordered packing. These enhancements facilitate improvement D:A interface area charge transport channel, ultimately contributing impressive PCEs 19.18% from 18.27% devices. More importantly, using overcomes notorious batch‐dependent heat degradation issues OSCs, leading excellent batch‐to‐batch enhanced stability This reported method promising available industrial laboratory use controllably OSCs.

Language: Английский

Citations

24
Achieving 19.78%‐Efficiency Organic Solar Cells by 2D/1A Ternary Blend Strategy with Reduced Non‐Radiative Energy Loss DOI
Xiaolin Jiang, Xiaodong Wang, Yifan Wang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)

Published: June 2, 2024

Abstract Reducing non‐radiative energy loss (∆ E nr ) is critical for enhancing the photovoltaic performance of organic solar cells (OSCs). To achieve this, a small molecular donor, LJ1, introduced as third component in host system D: A (D18: BTP‐eC9‐4F). The cascade‐like level alignment D18, and BTP‐eC9‐4F facilitates efficient charge transfer. LJ1's good solubility processing solvent high miscibility with delay precipitation BTP‐eC9‐4F, leading to improved phase morphology blend films. Additionally, LJ1 increases spacing between polymer donor (PD) molecule acceptor (SMA), optimizing film reducing OSCs. Ternary OSCs based on D18:LJ1:BTP‐eC9‐4F power conversion efficiency (PCE) 19.43% reduced ∆ . Notably, ternary device using D18:LJ1:L8‐BO attains an outstanding PCE 19.78%, which one highest OSC. work highlights effectiveness strategy OSC while minimizing

Language: Английский

Citations

19
High Mobility Emissive Organic Semiconductors for Optoelectronic Devices DOI
Ziyi Xie, Dan Liu, Can Gao

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

High mobility emissive organic semiconductors (HMEOSCs) are a kind of unique semiconducting material that simultaneously integrates high charge carrier and strong emission features, which not only crucial for overcoming the performance bottlenecks current optoelectronic devices but also important constructing high-density integrated devices/circuits potential smart display technologies electrically pumped lasers. However, development HMEOSCs is facing great challenges due to mutually exclusive requirements molecular structures packing modes between solid-state emission. Encouragingly, considerable advances on have been made with continuous efforts, successful integration these two properties within individual currently presents promising research direction in electronics. Representative progress, including design HMEOSCs, exploration their applications photoelectric conversion electroluminescent devices, especially photovoltaic cells, light-emitting diodes, transistors, summarized timely manner. The developing other related lasers, spin transistors discussed. We hope this perspective will boost rapid new mechanism understanding wide different fields entering stage.

Language: Английский

Citations

4
20.6% Efficiency Organic Solar Cells Enabled by Incorporating a Lower Bandgap Guest Nonfullerene Acceptor Without Open‐Circuit Voltage Loss DOI
Yuanyuan Jiang, Kerui Liu, Feng Liu

et al.

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

Published: Feb. 28, 2025

Abstract Simultaneously mitigating both photovoltage and photocurrent losses is crucial for organic solar cells (OSCs) to approach the Shockley–Queisser limit of ideal efficiency. Incorporating a narrower bandgap nonfullerene acceptor (NFA) as guest component into host donor:NFA system broadens absorption spectrum. However, this can also increase nonradiative decay rate according energy‐gap law. In work, ternary OSCs are constructed by combining narrow AQx‐2F (as NFA) with lower eC9 NFA), significantly enhancing generation without compromising photovoltage. The addition acts crystallization inducer, extending period increasing ordered packing distance. This leads suppressed trap states, elevated dielectric constant, prolonged exciton lifetime, balanced hole/electron transport, reduced recombination loss. Consequently, optimized D18:AQx‐2F:eC9 achieve champion power conversion efficiency (PCE) 20.6% high open‐circuit voltage 0.937 V, short‐circuit current density 27.2 mA cm −2 fill factor 80.8%, validated an independently certified PCE 20.0%, establishing new benchmark bulk heterojunction OSCs. work demonstrates effective method simultaneously mitigate losses, paving way high‐performance

Language: Английский

Citations

3
Over Twofold Fluorescence Lifetime Increase in PTCDA Organic Crystals through Sodium-Ion Insertion DOI
Chenyang Shen, Jiamin Wang,

Xintong Hu

et al.

The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 4, 2025

Optimizing the photophysical properties of less defective organic crystals is crucial for advancing their applications in optoelectronic devices. In this study, we investigate enhancement fluorescence lifetime an semiconductor by inserting Na ions into perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) using a physical vapor transport (PVT) method. X-ray diffraction (XRD) confirms that Na-ion insertion maintains original crystal structure. photoemission spectroscopy (XPS) reveals electron transfer from molecular carbonyl groups (C═O) surrounding PTCDA molecule to ions. Ultraviolet–visible (UV–vis) absorption and photoluminescence (PL) were employed influence content on intramolecular interaction properties, respectively. A twofold increase was achieved NaxPTCDA crystals, attributed enhanced self-trapped excitons. Our results demonstrate alkali metal can effectively modulate interactions, thereby optimizing lifetime. These findings offer alternative strategy rational design high-performance devices, improving both sensitivity efficiency.

Language: Английский

Citations

1
High‐Performance Fatigue‐Resistant Dual‐ Polyrotaxane Hydrogel Electrolytes for Flexible Aqueous Zinc‐Ion Batteries DOI Open Access

Junkang Xu,

Yiran Zhu, Qinghua Gui

et al.

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

Published: March 3, 2025

Abstract This study presents a novel anti‐fatigue hydrogel electrolyte with slip‐ring structure for next‐generation flexible wearable energy storage systems. Conventional quasi‐solid aqueous zinc‐ion batteries (ZIBs) electrolytes often suffer from mechanical degradation under repeated stress, limiting practical use. To overcome this, dual‐Polyrotaxane (DPR)‐polyacrylic acid (PAA) unique architecture is synthesized, that enhances durability, self‐healing, and adhesion. The interwoven DPR PAA networks distribute stress evenly, ensuring high ionic conductivity while preventing zinc dendrites parasitic reactions uniform deposition during cycling.When applied to quasi‐solid‐state Zn‐MnO₂ battery, this achieves specific capacity of 295 mAh g⁻¹ MnO₂ at 0.5C, retains 147 5C, shows 81.52% retention after 1000 cycles. battery also demonstrates exceptional stability, pairs lasting over 1750 h 5 mA cm⁻ 2 . Furthermore, it maintains reliable operation stresses like pressing, folding, twisting, making ideal applications. work advances design, offering durable, high‐performance solution

Language: Английский

Citations

1
Synergistically modulating d-band centers of bimetallic elements for activating cobalt atoms and promoting water dissociation toward accelerating alkaline hydrogen evolution DOI
Shu‐Ming Li, Zhan Liu, Xiaoyun Li

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 351, P. 123972 - 123972

Published: April 24, 2024

Language: Английский

Citations

8
Perovskite Solar Cells Dominated by Bimolecular Recombination─How Far Is the Radiative Limit? DOI
Kashimul Hossain, Dhyana Sivadas, Dinesh Kabra

et al.

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(5), P. 2310 - 2317

Published: April 22, 2024

Here, we report an experimental demonstration of perovskite solar cells dominated by bimolecular recombination and critically analyze their performance against radiative limits. To this end, first establish a set quantitative benchmark characteristics expected from that are limited recombination. Transient as well steady-state intensity dependent measurements indicate our indeed operate at such limits with interface passivation comparable to the champion c-Si technology. Further, identify characterization schemes enable consistent back extraction parameters transient optoelectrical electroluminescence measurements. Remarkably, these predict important features dark current density vs voltage (J–V) Suns-VOC measurements, thus validating estimates methodology. Uniquely, work provides coherent interpretation diverse trends ranging J–V, Suns-VOC, steady-state, quantum yield. As such, insights shared in manuscript could have significant implications toward fundamental electronic processes further efficiency optimization Shockley–Queisser

Language: Английский

Citations

7
Alleviating excessive aggregation of a non-fullerene acceptor by delaying and shortening the crystallization time to reduce the energy loss of ternary organic solar cells DOI
Jiaqi Pan, Jinan Guan,

Zehao Wang

et al.

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(11), P. 4142 - 4156

Published: Jan. 1, 2024

PYIT was added to the PM6:Y6 system delay and shorten crystallization time of Y6. The ternary strategy has been successfully proven increase D/A interface area for faster exciton dissociation. E loss decreased (0.559 eV 0.539 eV), PCE increased (15.40% 17.05%).

Language: Английский

Citations

6