peri-Fused polyaromatic molecular contacts for perovskite solar cells

Nature, Journal Year: 2024, Volume and Issue: 632(8024), P. 301 - 306

Published: July 24, 2024

Language: Английский

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Review on Charge Carrier Transport in Inorganic and Organic Semiconductors

Coatings, Journal Year: 2023, Volume and Issue: 13(9), P. 1657 - 1657

Published: Sept. 21, 2023

Inorganic semiconductors like silicon and germanium are the foundation of modern electronic devices. However, they have certain limitations, such as high production costs, limited flexibility, heavy weight. Additionally, depletion natural resources required for inorganic semiconductor raises concerns about sustainability. Therefore, exploration development organic offer a promising solution to overcome these challenges pave way new era electronics. New applications optoelectronic devices been made possible by recent emergence semiconductors. Numerous innovative results on performance charge transport discovered with growth These discoveries opened up possibilities devices, solar cells, light-emitting diodes, field-effect transistors. The use materials in has potential revolutionise electronics industry providing low-cost, flexible, lightweight alternatives traditional materials. understanding carrier is crucial efficient This review offers thorough overview phenomenon focus underlying physical mechanisms how it affects device performance. processes generation recombination given special attention. Furthermore, this provides valuable insights into fundamental principles that govern behaviour carriers materials, which can inform design optimisation future

Language: Английский

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Effects of nonaromatic through‐bond conjugation and through‐space conjugation on the photoluminescence of nontraditional luminogens

Aggregate, Journal Year: 2024, Volume and Issue: 5(3)

Published: Feb. 8, 2024

Abstract Photoluminescence (PL) mechanisms of nontraditional luminogens (NTLs) have attracted great interest, and they are generally explained with intra/intermolecular through‐space conjugation (TSC) nonconventional chromophores. Here a new concept nonaromatic through‐bond (TBC) is proposed it proved that plays an important role in the PL NTLs. The behaviors three respective isomers cyclohexanedione gemdimethyl‐1,3‐cyclohexanedione were studied correlated their chemical aggregate structures. These compounds show different fluorescence emissions as well concentration, excitation solvent‐dependent emissions. which undergo keto‐enol tautomerism hence conjugated ketone‐enol structure (i.e., TBC) more red‐shifted TBC effect reduces energy gaps facilitates formation stronger TSC state. form also prone to occur excited state proton transfer (ESIPT). cooperative determines This work provides novel understanding NTLs importance for directing design synthesis

Language: Английский

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Functionalized Phenanthrene Imide‐Based Polymers for n‐Type Organic Thin‐Film Transistors

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(17)

Published: March 6, 2024

Abstract High‐performing n‐type polymers are crucial for the advance of organic electronics field, however strong electron‐deficient building blocks with optimized physicochemical properties constructing them still limited. The imide‐functionalized polycyclic aromatic hydrocarbons ( PAH s) extended π‐conjugated framework, high electron deficiency and good solubility serve as promising candidates developing high‐performance polymers. Among s, phenanthrene PhA ) features a well‐delocalized π‐system multiple modifiable active sites . However, ‐based imides seldom studied, mainly attributed to synthetic challenge. Herein, we report two functionalized CPOI CPCNI , by simultaneously incorporating imide carbonyl or dicyanomethylene onto Notably, dicyanomethylene‐modified exhibits well stabilized LUMO energy level (−3.84 eV), synergetic inductive effect from cyano groups. Subsequently, based on PCPOI‐Tz PCPCNI‐Tz were developed. Applied thin‐film transistors, owing electron‐deficiency polymer shows an improved mobility largely decreased threshold voltage compared This work affords structurally novel highlights effectiveness dual functionalization s electron‐withdrawing groups devising

Language: Английский

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Modulating the Photophysical Properties of Twisted Donor–Acceptor–Donor π-Conjugated Molecules: Effect of Heteroatoms, Molecular Conformation, and Molecular Topology

Accounts of Chemical Research, Journal Year: 2024, Volume and Issue: 57(15), P. 2219 - 2232

Published: July 24, 2024

ConspectusModulating the photophysical properties of organic emitters through molecular design is a fundamental endeavor in materials science. A critical aspect this process control excited-state energy, which essential for development triplet exciton-harvesting emitters, such as those with thermally activated delayed fluorescence and room-temperature phosphorescence. These are pivotal developing highly efficient light-emitting diodes bioimaging probes. particularly promising class these consists twisted donor-acceptor π-conjugated scaffolds. structures facilitate spatial separation frontier orbitals, crucial achieving narrow singlet-triplet energy gap. This gap necessary to overcome endothermic reverse intersystem crossing process, enhancing efficiency fluorescence. To precisely modulate emitting materials, it understand electronic new scaffolds, especially influenced by heteroatoms, well their conformations topologies. understanding not only improves but also expands potential applications advance technologies.In 2014, Takeda group made significant breakthrough discovering novel method synthesizing U-shaped diazaacenes (dibenzo[

Language: Английский

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High Mobility Emissive Organic Semiconductors for Optoelectronic Devices

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

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π‐Conjugated Polymers for High‐Performance Organic Electrochemical Transistors: Molecular Design Strategies, Applications and Perspectives

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Abstract The last decade has witnessed significant progress in organic electrochemical transistors (OECTs) due to their enormous potential applications various bioelectronic devices, such as artificial synapses, biological interfaces, and biosensors. remarkable advance this field is highly powered by the development of novel mixed ionic/electronic conductors (OMIECs). π‐Conjugated polymers (CPs), which are widely used optoelectronics, emerging key channel materials for OECTs. In review, after briefly introducing OECT, we then mainly focus on latest CPs high‐performance correlations structure, basic physicochemical properties, device performance elucidated evaluating electronic characters, optoelectronic OECT performance. Then, CP‐based OECTs presented. Finally, discuss several remaining issues or challenges give our insights into advancing enhanced

Language: Английский

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Recent developments in polymer semiconductors with excellent electron transport performances

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This review describes the design considerations, bonding modes between monomers, structural modification strategies, and applications of polymer semiconductors with excellent electron transport performances.

Language: Английский

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Dibenzothiophene Sulfone‐Based Ambipolar‐Transporting Blue‐Emissive Organic Semiconductors Towards Simple‐Structured Organic Light‐Emitting Transistors

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(42)

Published: Aug. 26, 2023

The development of blue-emissive ambipolar organic semiconductor is an arduous target due to the large energy gap, but indispensable part for electroluminescent device, especially transformative display technology simple-structured light-emitting transistor (SS-OLET). Herein, we designed and synthesized two new dibenzothiophene sulfone-based high mobility semiconductors (DNaDBSOs), which demonstrate superior optical property with solid-state photoluminescent quantum yield 46-67 % typical ambipolar-transporting properties in SS-OLETs symmetric gold electrodes. Comprehensive experimental theoretical characterizations reveal natural such DNaDBSOs-based materials ascribed a synergistic effect on lowering LUMO level reduced electron injection barrier induced by interfacial dipoles electrodes incorporation appropriate DBSO unit. Finally, efficient electroluminescence high-quality blue emission (CIE (0.179, 0.119)) narrow full-width at half-maximum 48 nm are achieved DNaDBSO-based SS-OLET, showing good spatial control recombination zone conducting channel. This work provides avenue designing emissive incorporating regulation molecular-metal interaction, would advance optoelectronic their high-density integrated devices circuits.

Language: Английский

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Precisely Patterned Channels in a Vertical Organic Electrochemical Transistor with a Diazirine Photo‐Crosslinker

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(18)

Published: March 2, 2024

Organic electrochemical transistors (OECTs) rely on both efficient ionic doping/de-doping process and carrier transport in the mixed ionic-electronic channel under modulation of gate bias. Moreover, channels that hold photopatterning capability are highly desired to minimize parasitic capacitance simplify fabrication process/cost. However, yielding photo-patternable with precise/robust patterning controllable coupling is still challenging. Herein, double-end trifluoromethyl diazirines (DtFDA) different chain lengths introduced OECT act as photo-crosslinker medium regulate transport. Specifically, high-resolution patterns a minimum line width/gap 2 μm realized p(g2T-T) or Homo-gDPP based by introducing DtFDA. Maximum transconductances 68.6 mS 81.6 mS, current on/off ratio 10

Language: Английский

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