Selenium Substitution in Bithiophene Imide Polymer Semiconductors Enables High‐Performance n‐Type Organic Thermoelectric

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(23)

Published: March 16, 2023

Abstract Designing n ‐type polymers with high electrical conductivity remains a major challenge for organic thermoelectrics (OTEs). Herein, by devising novel selenophene‐based electron‐deficient building block, the pronounced advantages of selenium substitution in simultaneously enabling advanced is demonstrated mobility (≈2 orders magnitude higher versus their sulfur‐based analogues due to both intensified intra‐ and inter‐chain interactions) much improved ‐doping efficiency (enabled largely lowered LUMO level ≈0.2 eV margin) resulting polymers. Via side chain optimization donor engineering, selenium‐substituted polymer, f‐BSeI2TEG‐FT, achieves highest 103.5 S cm −1 power factor 70.1 µW m K −2 , which are among values reported literature polymers, f‐BSeI2TEG‐FT greatly outperformed analogue polymer 40% increase. These results demonstrate that very effective strategy improving performance provide important structure‐property correlations developing high‐performing OTE materials.

Language: Английский

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Impact of Linker Engineering in Core‐Linked Dimeric Acceptors for High‐Performance Organic Solar Cells

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(41)

Published: July 3, 2024

Abstract The dimerization of small molecule acceptors (SMAs) is a promising strategy for enhancing the long‐term stability and power conversion efficiency (PCE) organic solar cells (OSCs). However, reported DSMAs are primarily limited to end‐linked molecular configurations, highlighting need further exploration various dimer architectures. Herein, development two distinct core‐linked dimerized SMAs (DYF‐V DYF‐E) with tailored linker structures (vinylene ethynyl, respectively), achieving high‐performance OSCs (PCE = 18.53%). Interestingly, subtle change in results markedly different properties photovoltaic performances acceptors. DYF‐E an ethynyl exhibits more twisted backbone conformation mitigated aggregation property compared DYF‐V, inducing desirable blend morphologies polymer donor including high crystallinity, face‐on oriented packing structures, well‐intermixed domains. Thus, DYF‐E‐based exhibit PCE (17.02%), which significantly outperforms DYF‐V‐based 9.98%). Furthermore, ternary based on achieve higher 18.53%. this study highlights significance selecting appropriate producing OSCs.

Language: Английский

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Crosslinking-induced anion transport control for enhancing linearity in organic synaptic devices

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(19), P. 4638 - 4650

Published: Jan. 1, 2024

A novel approach using click chemistry-designed photocrosslinking can effectively modulate ion transport in conjugated polymers, leading to improved linearity and nonvolatility artificial synaptic devices.

Language: Английский

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Evolving Role of Conjugated Polymers in Nanoelectronics and Photonics

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: April 24, 2025

Abstract Conjugated polymers (CPs) have emerged as an interesting class of materials in modern electronics and photonics, characterized by their unique delocalized π-electron systems that confer high flexibility, tunable electronic properties, solution processability. These organic present a compelling alternative to traditional inorganic semiconductors, offering the potential for new generation optoelectronic devices. This review explores evolving role CPs, exploring molecular design strategies innovative approaches enhance properties. We highlight notable progress toward developing faster, more efficient, environmentally friendly devices analyzing recent advancements CP-based devices, including photovoltaics, field-effect transistors, nonvolatile memories. The integration CPs flexible sustainable technologies underscores revolutionize future photonic systems. As ongoing research pushes frontiers engineering device architecture, are poised play essential shaping next-generation prioritize performance, sustainability, adaptability.

Language: Английский

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Molecular orientation of dielectric layers at indigo/dielectric interfaces impacts the ordering of indigo films in organic field-effect transistors

The Journal of Chemical Physics, Journal Year: 2025, Volume and Issue: 162(1)

Published: Jan. 2, 2025

Organic multilayer systems, which are stacked layers of different organic materials, used in various electronic devices such as light-emitting diodes (OLEDs) and field-effect transistors (OFETs). In particular, OFETs promising key components flexible devices. this study, we investigated how the inclusion an insulating tetratetracontane (TTC) interlayer ambipolar indigo-based can be to alter crystallinity electrical properties indigo charge transport layer. We find that a 20-nm-thick TTC film thermally annealed at low temperature 70 °C acts significantly increase X-ray diffraction, atomic force microscopy, vibrational sum frequency generation measurements showed annealing improved its ordering. The sum-frequency spectra TTC/indigo bilayers show ordering films promotes growth crystalline exhibit mobilities OFET nearly order magnitude larger than those measured for grown on unannealed layers. Furthermore, using spectroscopy, found pre-annealing layer prior deposition suppress formation defects within during growth, also contributes enhanced transport. Our results highlight importance controlling molecular contacts structures achieve performance.

Language: Английский

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Organic Solid-State Electrolyte Synaptic Transistors with Photoinduced Thiol–Ene Cross-linked Polymer Electrolytes for Deep Neural Networks

ACS Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 682 - 691

Published: Jan. 23, 2025

In this work, we describe a solid-state polymer electrolyte (SPE)-based electrolyte-gated organic field-effect transistors (EGOFETs) consisting of thiol-ene-assisted photo-cross-linked nitrile butadiene rubber (NBR) network embedded with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) electrolyte. The photocurable SPE film can be patterned different dimensions by photolithography and exhibits excellent electronic properties crucial synaptic behavior. NBR/LiTFSI EGOFET high transconductance 11.9 mS on/off ratio 105 at scan rate 40 mV/s. Due to the strongly polarized nature NBR Li-ion diffusion, device significant current hysteresis, enabling synaptic-like learning memory demonstrates DNN 91.9% handwritten digit recognition accuracy. This work potential in creating highly efficient low-energy neuromorphic devices.

Language: Английский

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Conjugated polymers with near-infrared (NIR) optical absorption: structural design considerations and applications in organic electronics

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(23), P. 8188 - 8216

Published: Jan. 1, 2024

This review highlights key strategies in structural engineering for achieving near-IR (NIR) optical absorption with conjugated polymers (NIR-CPs), and it details their utility various organic electronic device applications.

Language: Английский

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Exploring new logic devices: Unlocking potential with floating-gate transistor

Applied Physics Reviews, Journal Year: 2024, Volume and Issue: 11(3)

Published: Aug. 9, 2024

Floating-gate devices occupy a pivotal position in contemporary electronic systems, owing to their versatile capabilities nonvolatile memory storage, analog circuit design, and emerging applications neuromorphic computing. These leverage distinctive floating-gate structure isolated from the surrounding circuitry, enabling storage manipulation of charge. The ability retain charges even without external power makes them ideal for requiring persistent data storage. This review explores fundamental principles devices, focusing on application logic combining structures such as (i) reconfigurable logics, (ii) multi-valued (iii) (iv) in-sensor Various types these new concept logics are examined, highlighting key characteristics advantages. Potential solutions future research directions also discussed. Based comprehensive recent three-year studies, we aim provide an overview floating-gate-based emphasizing significance modern electronics potential enable innovative fields devices.

Language: Английский

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Benzothiadiazole versus Thiazolobenzotriazole: A Structural Study of Electron Acceptors in Solution‐Processable Organic Semiconductors

Chemistry - An Asian Journal, Journal Year: 2022, Volume and Issue: 17(22)

Published: Sept. 14, 2022

Abstract Despite the rapid progress of organic electronics, developing high‐performance n‐type semiconductors is still challenging. Donor‐acceptor (D‐A) type conjugated structures have been an effective molecular design strategy to achieve chemically‐stable and appropriate choice acceptor units determines electronic properties device performances. We now synthesized two types A 1 ‐D‐A 2 molecules, namely, NDI‐BTT‐NDI NDI‐TBZT‐NDI, with different central units. In order investigate effects on charge‐transporting properties, field‐effect transistors (OFETs) were fabricated. NDI‐TBZT‐NDI had shallower HOMO deeper LUMO levels than NDI‐BTT‐NDI. Hence, facilitated charge injection resulted in ambipolar transistor performances optimized hole electron mobilities 0.00134 0.151 cm V −1 s , respectively. contrast, displayed only n‐channel OFET performance mobility 0.0288 . addition, based showed a superior air stability that The difference these was reasonably explained by contact resistance film morphology. Overall, this study demonstrated TBZ promising building block create semiconductors.

Language: Английский

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Tuning the nanostructure and molecular orientation of high molecular weight diketopyrrolopyrrole-based polymers for high-performance field-effect transistors

Nanoscale, Journal Year: 2022, Volume and Issue: 15(2), P. 553 - 561

Published: Dec. 6, 2022

The molecular orientation of PDPP3T is efficiently tuned from a face- to an edge-on texture using appropriate solvents, with the formation fibril-like nanostructure, leading significant performance improvement in field-effect transistors.

Language: Английский

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