Cited by Ameliorated trap density and energetic disorder <i>via</i> a strengthened intermolecular interaction strategy to construct efficient non-halogenated organic solar cells

Compromising Charge Generation and Recombination of Organic Photovoltaics with Mixed Diluent Strategy for Certified 19.4% Efficiency DOI

Tianyi Chen, Shuixing Li,

Yaokai Li

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(21)

Published: March 3, 2023

The ternary blend is demonstrated as an effective strategy to promote the device performance of organic photovoltaics (OPVs) due dilution effect. While compromise between charge generation and recombination remains a challenge. Here, mixed diluent for further improving efficiency OPV proposed. Specifically, high-performance system with polymer donor, i.e., PM6, nonfullerene acceptor (NFA), BTP-eC9, diluted by diluents, which involve high bandgap NFA BTP-S17 low BTP-S16 (similar that BTP-eC9). better miscibility BTP-eC9 can dramatically enhance open-circuit voltage (VOC ), while maximizes or short-circuit current density (JSC ). interplay BTP-17 enables recombination, thus leading 19.76% (certified 19.41%), best among single-junction OPVs. Further analysis on carrier dynamics validates efficacy diluents balancing be attributed more diverse energetic landscapes improved morphology. Therefore, this work provides commercialization.

Language: Английский

Citations

259

Donor–acceptor mutually diluted heterojunctions for layer-by-layer fabrication of high-performance organic solar cells DOI

Liang Wang, Chen Chen,

Yiwei Fu

et al.

Nature Energy, Journal Year: 2024, Volume and Issue: 9(2), P. 208 - 218

Published: Jan. 9, 2024

Language: Английский

Citations

128

Solid Additive-Assisted Layer-by-Layer Processing for 19% Efficiency Binary Organic Solar Cells DOI

Guanyu Ding,

Tianyi Chen, Mengting Wang

et al.

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: April 10, 2023

Morphology is of great significance to the performance organic solar cells (OSCs), since appropriate morphology could not only promote exciton dissociation, but also reduce charge recombination. In this work, we have developed a solid additive-assisted layer-by-layer (SAA-LBL) processing fabricate high-efficiency OSCs. By adding additive fatty acid (FA) into polymer donor PM6 solution, controllable pre-phase separation forms between and FA. This intermixed facilitates diffusion acceptor Y6 during LBL processing, due good miscibility fast-solvation FA with chloroform solution dripping. Interestingly, results in desired refined phase-separated domain vertical phase-separation structure better balance transport /collection dissociation. Consequently, binary single junction OSCs based on PM6:Y6 blend reach champion power conversion efficiency (PCE) 18.16% SAA-LBL which can be generally applicable diverse systems, e.g., PM6:L8-BO-based devices thick-film devices. The efficacy confirmed PM6:L8-BO, where record PCEs 19.02% 16.44% are realized for 100 250 nm active layers, respectively. work provides simple effective way control demonstrates promising methodology boosting industrial manufacturing

Language: Английский

Citations

105

Revealing the underlying solvent effect on film morphology in high-efficiency organic solar cells through combinedex situandin situobservations DOI

Ruijie Ma, Xinyu Jiang, Jiehao Fu

et al.

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(5), P. 2316 - 2326

Published: Jan. 1, 2023

Here the aggregation behavior differences induced by solvent–material and material–material interactions are clearly revealed combined ex situ in morphology characterization studies on representative high-efficiency OPV systems.

Language: Английский

Citations

High‐Performance Organic Solar Cells Containing Pyrido[2,3‐b]quinoxaline‐Core‐Based Small‐Molecule Acceptors with Optimized Orbit Overlap Lengths and Molecular Packing DOI

Tongle Xu, Zhenghui Luo, Ruijie Ma

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(30)

Published: May 26, 2023

Abstract The central core in A‐DA 1 D‐A‐type small‐molecule acceptor (SMAs) plays an important role determining the efficiency of organic solar cells (OSCs), while principles governing efficient design SMAs remain elusive. Herein, we developed a series with pyrido[2,3‐ b ]quinoxaline (PyQx) as new electron‐deficient unit by combining cascade‐chlorination strategy, namely Py1, Py2, Py3, Py4 and Py5. introduction chlorine atoms reduces intramolecular charge transfer effects but elevates LUMO values. Density functional theory (DFT) reveals that Py2 ortho substituted PyQx Py5 two yield larger dipole moments smaller π⋅⋅⋅π stacking distances, compared other three acceptors. Moreover, shows strongest light absorption capability induced extended orbit overlap lengths more packing structures dimers. These features endow best device performance due to better molecular aggregation behaviors, suitable domain sizes exciton dissociation recombination. This study highlights significance incorporating large moments, small distances dimers into development high‐performance SMAs, providing insight for OSCs.

Language: Английский

Citations

Side-chain engineering of nonfullerene small-molecule acceptors for organic solar cells DOI

Zhenghui Luo, Tongle Xu, Cai’e Zhang

et al.

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(7), P. 2732 - 2758

Published: Jan. 1, 2023

This review summarizes the side-chain engineering of nonfullerene small-molecule acceptors (SMAs) in field organic solar cells, discusses key structure–property relationships depth and future directions engineering.

Language: Английский

Citations

Suppressing electron-phonon coupling in organic photovoltaics for high-efficiency power conversion DOI

Yuanyuan Jiang, Yixin Li, Feng Liu

et al.

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Aug. 21, 2023

The nonradiative energy loss (∆Enr) is a critical factor to limit the efficiency of organic solar cells. Generally, strong electron-phonon coupling induced by molecular motion generates fast decay and causes high ∆Enr. How restrict achieve low ∆Enr sticking point. Herein, free volume ratio (FVR) proposed as an indicator evaluate motion, providing new design rationale suppress decay. Theoretical experimental results indicate proper proliferation alkyl side-chain can decrease FVR leading reduced while maintaining ideal nanomorphology. favorable morphology are simultaneously obtained in AQx-6 with pinpoint chain proliferation, achieving PCE 18.6% optimized VOC, JSC FF. Our study discovered aggregation-state regulation great importance reduction coupling, which paves way high-efficiency OSCs.

Language: Английский

Citations

Achieving 19.4% organic solar cell via an in situ formation of p-i-n structure with built-in interpenetrating network DOI

Ying Zhang,

Wanyuan Deng,

Christopher E. Petoukhoff

et al.

Joule, Journal Year: 2024, Volume and Issue: 8(2), P. 509 - 526

Published: Jan. 11, 2024

Language: Английский

Citations

High‐Performance Small Molecule Organic Solar Cells Enabled by a Symmetric‐Asymmetric Alloy Acceptor with a Broad Composition Tolerance DOI

Yuan Gao, Xinrong Yang, Wei Wang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(23)

Published: March 29, 2023

Abstract Using a combinatory blending strategy is demonstrated as promising path for designing efficient organic solar cells (OSCs) by boosting the short‐circuit current density and fill factor. Herein, high‐performance ternary all‐small molecule OSC (all‐SMOSCs) using narrow‐bandgap alloy acceptor containing symmetric asymmetric molecules (BTP‐eC9 SSe‐NIC) wide‐bandgap small donor MPhS‐C2 reported. Introducing synthesized SSe‐NIC into MPhS‐C2:BTP‐eC9 host system can broaden absorption spectrum, modulate energy offsets, optimize molecular packing of materials. After systematically optimizing weight ratio MPhS‐C2:BTP‐eC9:SSe‐NIC, champion efficiency 18.02% achieved. Impressively, not only delivered broad composition tolerance with device efficiencies over 17% throughout whole blend ratios, but also exhibited less non‐geminate recombination loss, better‐light‐soaking stability than corresponding binary systems. This work promotes development all‐SMOSCs heralds their brighter application prospects.

Language: Английский

Citations

Achieving Desired Pseudo‐Planar Heterojunction Organic Solar Cells via Binary‐Dilution Strategy DOI

Lin Wen,

Houdong Mao,

Lifu Zhang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(3)

Published: Oct. 13, 2023

The sequential deposition process has demonstrated the great possibility to achieve a photolayer architecture with an ideal gradient phase separation morphology, which vital influence on physical processes that determine performance of organic solar cells (OSCs). However, controllable preparation pseudo-planar heterojunction (P-PHJ) distribution not been effectively elucidated. Herein, binary-dilution strategy is proposed, PM6 solution micro acceptor BO-4Cl and L8-BO donor respectively, form P-PHJ film. This exists good (D) (A) vertical larger D/A interpenetrating regions, promotes exciton generation dissociation, shortens charge transport distance optimizes carrier dynamics. Moreover, dilution by regulation active layer aggregation size purity, thus alleviating energy disorder voltage loss. As result, device exhibits outstanding power conversion efficiency 19.32% excellent short-circuit current density 26.92 mA cm

Language: Английский

Citations