Multiscale computational analysis of the effect of end group modification on PM6:BTP-x OSCs performance

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(34), P. 13311 - 13324

Published: Jan. 1, 2024

Theoretical computational simulation are used to analyse the molecular stacking characteristics of PM6:BTP- x OSCs and role end group modifications.

Language: Английский

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Conjugated π-Extension of Small Molecular Nonfullerene Acceptor for Efficient Ternary Organic Solar Cells with an Efficiency of 19.10%

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

In this study, we have successfully incorporated a small molecular acceptor, Y-LC, with conjugated π-extension as secondary acceptor in the PM6:BTP-eC9-based organic photovoltaics. The performance of device was significantly promoted from 18.45% binary system PM6:BTP-eC9 to over 19% ternary minimal Y-LC loading. This enhancement can be attributed alloy-like structures acceptors and optimized active layer morphology, which leads improved hole electron mobilities, thereby suppressing charge recombination, finally resulting higher photocurrent solar cells. Furthermore, complementary absorption is observed PM6 BTP-eC9, broaden spectrum photoactive enable more photons sunlight absorbed. Additionally, facilitates efficient transfer donor by forming cascade energy levels between BTP-eC9. These advantages collectively contribute superior obtained work also highlights that adoption nonfullerene suitable π-extensions minor additive photovoltaics powerful approach for achieving state-of-the-art

Language: Английский

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V2CTX MXene-derived ammonium vanadate with robust carbon skeleton for superior rate aqueous zinc-ion batteries

Chinese Chemical Letters, Journal Year: 2025, Volume and Issue: unknown, P. 111231 - 111231

Published: April 1, 2025

Language: Английский

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Unravel the Distinctive Roles of Liquid and Solid Additives in Blade‐Coated Active Layer for Organic Solar Cell Modules

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

Published: Sept. 24, 2024

Abstract Although encouraging progress in spin‐coated small‐area organic solar cells (OSCs), reducing efficiency loss caused by differences film uniformity and morphology when up‐scaled to large‐area modules through meniscus‐guided coating is an important but unsolved issue. In this work, in‐depth research conducted on the influence of both liquid solid additives active layer blade‐coated PM6:L8‐BO binary system. The study reveals that high boiling point like 1,8‐diiodooctane (DIO) used blade‐coating not only delay volatilization solvent also trigger Marangoni flow same direction as capillary flow, causing excessive aggregation acceptors, therefore destroying device performance. On contrary, additive 2‐Iododiphenyl ether (IDPE), which first reported can preserve mechanism for improving performance while effectively suppressing acceptors during film‐forming process from halogen‐free toluene, resulting highly homogeneous films. Consequently, with impressive 15.34% a total module area 18.90 cm 2 via based are achieved. This provides deep understanding effect perspective fluid mechanisms gives pathway development green printed high‐efficiency OSCs.

Language: Английский

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The selenium substitution of solvent additive enables efficient polymer solar cells with efficiency of 19.4 %

Nano Energy, Journal Year: 2024, Volume and Issue: 129, P. 110067 - 110067

Published: Aug. 2, 2024

Language: Английский

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Organic Solar Cells Based on Non‐Fullerene Low Molecular Weight Organic Semiconductor Molecules

ChemSusChem, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 6, 2024

Abstract The development of narrow bandgap A‐D‐A‐ and ADA′DA‐type non‐fullerene small molecule acceptors (NFSMAs) along with donors (SMDs) have led to significant progress in all‐small organic solar cells. Remarkable power conversion efficiencies, nearing the range 17–18 %, been realized. These efficiency values are on par those achieved OSCs based polymeric donors. commercial application photovoltaic technology requires design more efficient conjugated acceptors. In recent years precise tuning optoelectronic properties has attracted considerable attention contributed greatly advancement all‐SM‐OSCs. Several reviews published this field, but focus review concerns advances research using SMDs NFSMAs from 2018 present. covers made binary ternary OSCs, effects solid additives performance all‐SM‐OSCs, recently developed layer‐by‐layer deposition method for these OSCs. Finally, we present our perspectives a concise outlook further all‐SM‐OSCs their application.

Language: Английский

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All‐Small‐Molecule Ternary Organic Solar Cell with 16.35% Efficiency Enabled by Chlorinated Terminal Units

Solar RRL, Journal Year: 2024, Volume and Issue: 8(17)

Published: July 27, 2024

In the last few years, there have been notable developments in organic solar cells using both small molecule donor and acceptor. It has noted that adding halogens to end groups of molecules could enhance film structure and, consequently, performance devices. this study, three novel donors are created. The include a vinyl‐CPDT oligomer with units, end‐caps made up indanedione containing four H, Cl, F substituents. purpose study is investigate how halogen substituent affects photovoltaic characteristics binary devices non‐fullerene acceptor (NFA) TOCR2 as Having device enhances its effectiveness, FG5, which 4‐Cl substituents groups, shows highest efficiency among all PCE 14.39%. Incredibly, ternary created normal atmospheric conditions chloro‐substituted FG5 donor, acceptor, wide band gap NFA DICTF third element significantly improved efficiency, achieving values 16.35%.

Language: Английский

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Electroactive and Self‐healing Polyurethane Doped Tin Oxide Interlayers for Efficient Organic Solar Cells^†

Chinese Journal of Chemistry, Journal Year: 2024, Volume and Issue: 42(23), P. 2979 - 2986

Published: Aug. 24, 2024

Comprehensive Summary Tin oxide (SnO 2 ) has been widely used as an electron transport layer (ETL) in optoelectronic devices. However, there are numerous surface or bulk defects SnO , working charge recombination centers to degrade device. Here, electroactive and self‐healing polyurethane (PHNN) was designed by integrating conjugated unit – naphthalene diimide (NDI) into a typical backbone. Numerous hydrogen bonds π interactions PHNN work non‐covalent endow this polymer with superior properties. contains lots of aliphatic amine carbonyl groups, which effectively passivate the . The stacking NDI units will facilitate delocalization, endowing electrical activity compared traditional polyurethane. Doping can improve conductivity reduce function layer, is conducive efficient extraction transport. Using doped ETL for PM6: Y6 BTP‐eC9 based inverted organic solar cells achieve high efficiency 17.16% 17.51%, respectively. Devices containing show significantly improved stability. Thus, interlayers performance interfacial modification align energy‐levels cell devices, have promising applications electronics.

Language: Английский

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Impact of End-Group Chlorination on Charge Generation and Recombination Patterns in Organic Solar Cells with Wide-Band-Gap Acceptors

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 2, 2024

Language: Английский

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A Steric Camphane-Functionalized Fused-Ring Electron Acceptor for Efficient Ternary Non-Fullerene Organic Solar Cells

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: 7(22), P. 10662 - 10669

Published: Nov. 9, 2024

Functionalization of Y-type non-fullerene acceptors (Y-NFAs) with bulky units at the alkyl chains, terminal IC ends, or central cores has been an efficient route to boosting efficiency NFA-based organic solar cells (OSCs). Single-crystal structure analysis a powerful tool provide detailed information, such as bending conjugated backbone and packing formats molecules in solid, which can supply valuable insight into performance relation direct further molecular design new NFAs. However, growth high-quality single crystals NFAs groups is often challenging. Herein, we designed synthesized NFA, Norb-Y, decorated steric camphane unit on core through fused quinoxaline bridge. Norb-Y was successfully characterized by single-crystal analysis, revealing well-fined atomic intermolecular stacking format. Notably, displays better coplanarity small dihedral angle 18° between two groups. Moreover, three kinds π–π modes corresponding J-aggregation were identified, including end-to-end, arm-to-arm, tail-to-tail modes, all contributed segment from thiophene end. Meanwhile, H-aggregation associating suppressed units, drives assembly C–H···F H bonds instead. This kind significance for reducing voltage loss increasing OSCs' open circuit voltage, finally verified PM6:BTP-eC9:Norb-Y- D18:N3:Norb-Y-based ternary OSCs.

Language: Английский

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