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

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

Published: Jan. 9, 2024

Language: Английский

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Suppressing Trap‐Assisted Nonradiative Recombination via Interface Modification for Achieving Efficient Organic Solar Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(22)

Published: March 11, 2024

Abstract Trap states in organic solar cells (OSCs) can capture free charges, leading to a reduction current density and significant energy loss. Since charge collection is primarily dependent on the interface layer, minimizing trap at interfaces effectively suppress losses, topic that has been rarely explored. Herein, an strategy proposed by combining Me‐4PACz PEDOT:PSS mitigate trap‐assisted nonradiative recombination hole transport layer (HTL). OSCs based Me‐4PACz/PEDOT:PSS exhibit reduced densities low losses compared devices fabricated with single‐layer HTL. This be attributed lower rate during interface. Changes work function of two interlayers due contact result existence built‐in potential inside composite interlayer, promoting reducing loss from recombination. Furthermore, HTL induces vertical phase separation active improvements fill factor for OSCs. As result, high power conversion efficiencies (PCEs) 18.70% 19.02% are achieved binary all‐polymer polymer donor/small molecule acceptor cells, respectively.

Language: Английский

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Proton-electron coupling and mixed conductivity in a hydrogen-bonded coordination polymer

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Feb. 3, 2025

Language: Английский

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Double Hole Transport Layers Enable 20.42% Efficiency Organic Solar Cells by Aggregation Control of Self‐Assembled Molecules on Cobalt Salt Surfaces

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

Published: March 26, 2025

Heterojunction interfaces play a crucial role in charge carrier transport, influencing the overall photovoltaic performance of organic solar cells (OSCs). Despite importance, advancements interfacial engineering, especially optimizing microstructure and nanomorphology, have not kept pace with research on photoactive layers. In study, strategy is explored to control self-assembly growth alcohol-soluble Me-4PACz (4P) used as hole transport layer (HTL) OSCs. The surface architecture modified inorganic Co salts via Cu doping UV-ozone treatments, creating smooth top an increased Co3+/Co2+ ratio hydroxyl groups. This meticulous design fine-tuned assembly behavior self-assembled molecules, resulting transition from spherical aggregates more uniform worm-like morphology. Additionally, electrical optical properties are optimized passivate defects enhance wettability solvents, leading improved extraction reduced recombination losses. Consequently, OSC Cu-Co/4P HTL exhibited highest power conversion efficiency 20.42% (certified 20.20%). characteristic universality stability make potential candidate for widespread applications, particularly providing rationalized guidance further

Language: Английский

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Post-Treatment Free Yttrium Phosphotungstate Anode Interfacial Material for Organic Solar Cells with 20.55% Efficiency

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 2045 - 2051

Published: April 1, 2025

Language: Английский

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Improving the Stability of Organic Solar Cells: From Materials to Devices

Solar RRL, Journal Year: 2023, Volume and Issue: 7(20)

Published: Aug. 24, 2023

Organic solar cells (OSCs) are a promising emerging photovoltaic technology for energy conversion. Recently, the power conversion efficiencies of OSCs have been improved to get closer their Schottky–Queisser limit. However, operational stability remains as major challenge ahead deployment practical applications. The main causes OSC instability stem from poor intrinsic materials, metastable morphology multicomponent active layer, unstable interfaces, and sensitivity moisture oxygen. To address these issues, it is necessary comprehensive in‐depth understanding fundamentals develop an integrated solution overcome them. Herein, state‐of‐art strategies used improve aspects material design, device processing, encapsulation techniques, in hope delivering rational solutions, summarized. In end, prospects toward future development efficient stable provided.

Language: Английский

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Optimized Crystal Framework by Asymmetric Core Isomerization in Selenium‐Substituted Acceptor for Efficient Binary Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(49)

Published: Oct. 12, 2023

Both the regional isomerization and selenium-substitution of small molecular acceptors (SMAs) play significant roles in developing efficient organic solar cells (OSCs), while their synergistic effects remain elusive. Herein, we developed three isomeric SMAs (S-CSeF, A-ISeF, A-OSeF) via subtly manipulating mono-selenium substituted position (central, inner, or outer) type heteroaromatic ring on central core by strategies for OSCs, respectively. Crystallography asymmetric A-OSeF presents a closer intermolecular π-π stacking more ordered 3-dimensional network packing charge-hopping pathways. With successive out-shift position, neat films give slightly wider band gap gradually higher crystallinity electron mobility. The PM1 : afford favourable fibrous phase separation morphology with charge transportation compared to other two counterparts. Consequently, A-OSeF-based devices achieve champion efficiency 18.5 %, which represents record value reported selenium-containing binary OSCs. Our precise engineering selenium-based provides promising approach optimizing crystal boosting top-ranked SMAs-based

Language: Английский

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Asymmetric Π‐Bridge Engineering Enables High‐Permittivity Benzo[1,2‐B:4,5‐b′]Difuran‐Conjugated Polymer for Efficient Organic Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(9)

Published: Sept. 13, 2023

Abstract Organic solar cells (OSCs) exhibit complex charge dynamics, which are closely correlated with the dielectric constant (ɛ r ) of photovoltaic materials. In this work, a series novel conjugated copolymers based on benzo[1,2‐b:4,5‐b′]difuran (BDF) and benzotriazole (BTz) is designed synthesized, differ by nature π‐bridge from one another. The PBDF‐TF‐BTz asymmetric furan thiophene demonstrates larger ɛ 4.22 than PBDF‐dT‐BTz symmetric (3.15) PBDF‐dF‐BTz (3.90). also offers more favorable molecular packing appropriate miscibility non‐fullerene acceptor Y6 its counterparts. corresponding PBDF‐TF‐BTz:Y6 OSCs display efficient exciton dissociation, fast transport collection, reduced recombination, eventually leading to power conversion efficiency 17.01%. When introducing fullerene derivative (PCBO‐12) as third component, PBDF‐TF‐BTz:Y6:PCBO‐12 yield remarkable FF 80.11% high 18.10%, highest value among all reported BDF‐polymer‐based OSCs. This work provides an effective approach developing high‐permittivity materials, showcasing promising polymer donor for constructing high‐performance

Language: Английский

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Cyanoesterthiophene Based Low‐Cost Polymer Donors for High Efficiency Organic Solar Cells

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(19)

Published: Jan. 11, 2024

Abstract To achieve commercial application of organic solar cells (OSCs), it is necessary to reduce material costs and improve device efficiency. This paper reports on the utilization a multifunctional building block, namely 3‐cyanoesterthiophene, which exhibits simple structure accessibility synthetic for cost‐effective high‐performance polymer donors (PDs). Meanwhile, ternary terpolymerization strategies have been studied. Two similar PDs, PBTCl0‐TCA PBTCl100‐TCA, are synthesized, devices exhibit less‐than‐satisfactory efficiency 13.21% 11.53% due mismatching energy level imperfect morphology. The two PDs with comparable structures commendable compatibility easily form alloy‐like phase in active layer, can effectively boost 14.17% retained high J SC significant improved open‐circuit voltage ( V OC ) fill factor (FF). Encouraged by blending phenomenon, donor (PBTCl50‐TCA) same ratio random designed. And over 17% binary OSCs using demonstrated. synergies incorporation cyanoester‐group terpolymer endow developed deep‐lying levels, face‐on orientation, thermodynamic miscibility prevailing nonfullerene acceptor appropriate crystallinity. findings study provide valuable insights support advancement PDs.

Language: Английский

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C-shaped ortho-benzodipyrrole-based acceptors with different electronic effects of top substituents for as-cast green-solvent processed high-performance organic solar cells

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(18), P. 6844 - 6855

Published: Jan. 1, 2024

We systematically investigated the effects of top substituents on physicochemical properties SMAs and achieved highest PCE for OSCs processed using a non-halogenated solvent without any extra treatment.

Language: Английский

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