Novel solution-processed 2D organic semiconductor crystals for high-performance OFETs

Materials Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 8(10), P. 2227 - 2272

Published: Jan. 1, 2024

2D organic semiconductor crystals have the advantage of ultrathin thickness, long-range ordered molecular structures, absence grain boundaries, and low defect impurity densities. They are great significance for preparing high-performance OFET devices.

Language: Английский

---

Recent Advances in Boron‐Containing Acenes: Synthesis, Properties, and Optoelectronic Applications^†

Chinese Journal of Chemistry, Journal Year: 2022, Volume and Issue: 41(11), P. 1355 - 1373

Published: Dec. 31, 2022

Comprehensive Summary Acenes with linearly fused benzene rings have attracted much attention due to their intriguing optical and electronic properties. Nevertheless, the poor ambient stability of longer acenes has hampered investigation physicochemical properties potential applications. The incorporation main group elements into acene backbones provides a viable strategy enhance stability, meanwhile, generates new family heteroatom‐doped (namely heteroacenes) modified functions. In particular, boron‐containing represent an attractive class heteroacenes owing existence vacant p orbital boron, which endows π‐conjugated systems appealing features, such as Lewis acidity, electron‐accepting capability, stimuli‐responsivity, adjustable photophysical During past decade, significant progress been achieved in synthesis applications acenes, but focused review on this topic elusive. Here, we summarize recent advances studies covering synthesis, properties, various electroluminescence devices, well biosensors, etc . We hope that timely will stimulate research interest unique materials promote optoelectronic

Language: Английский

---

Directional Carrier Polarity Tunability in Ambipolar Organic Transistors Based on Diketopyrrolopyrrole and Bithiophene Imide Dual-Acceptor Semiconducting Polymers

Chemistry of Materials, Journal Year: 2022, Volume and Issue: 34(7), P. 3140 - 3151

Published: March 22, 2022

An organic ambipolar transistor allows the integration of p-type and n-type charge carrier transport in a single device. However, tunability polarity to meet specific requirements for practical applications is challenging thus rarely studied. In this work, two dual-acceptor-type polymers (FuI SeI) based on diketopyrrolopyrrole (DPP) bithiophene imide (BTI) are reported. By varying flanking groups DPP (furan FuI selenophene through an ionic additive strategy, both field-effect transistors (OFETs) can be directionally tuned. Specifically, pristine exhibited property with μe/μh values 2.79 4.9 SeI. Notably, average electron mobility SeI reaches as high 0.122 cm2 V–1 s–1. More encouragingly, 11.76% tetrabutylammonium iodide (TBAI, mole percentage) polymer, resultant OFETs varied from 0.71, showing conversion dominant transport. With same percentage TBAI dramatic increment 264 was observed, demonstrating significant unipolar Overall, study demonstrates possibility directional DPP- BTI-based dual-acceptor molecular modification being significantly beneficial complementary circuits.

Language: Английский

---

Periphery Fusion Strategy of a Carbazole‐Based Macrocycle toward Coplanar N‐Heterocycloarene for High‐Mobility Single‐Crystal Transistors

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(20)

Published: Feb. 18, 2023

Designing (hetero)cycloarenes through the modifications of π-topology and molecular packing organic semiconductors has recently garnered considerable attention. However, their applications as an active layer in field-effect transistors are very limited, obtained hole carrier mobilities less than 1 cm2 V-1 s-1 . In this work, a novel alkyl-substituted coplanar N-heterocycloarene (FM-C4) containing four carbazole units is successfully synthesized crystalline form. As compared to corresponding single-bond-linked carbazole-based macrocycle M-C4, it found that periphery fusion strategy greatly changes electronic structures, energy levels, photophysical properties, host-guest interactions with fullerenes, crystal stacking motifs. particular, fully fused FM-C4 exhibits herringbone structure unusual long-range π-π overlap distance low 3.19 Å, whereas single M-C4 demonstrates no interactions. consequence, single-crystal displays highest mobility 2.06 , significantly outperforming all reported suggesting high potential for applications.

Language: Английский

---

High‐Performance Ambipolar and n‐Type Emissive Semiconductors Based on Perfluorophenyl‐Substituted Perylene and Anthracene

Advanced Science, Journal Year: 2023, Volume and Issue: 10(15)

Published: March 26, 2023

Abstract Emissive organic semiconductors are highly demanding for light‐emitting transistors (OLETs) and electrically pumped lasers (EPOLs). However, it remains a great challenge to obtain with high carrier mobility photoluminescence quantum yield simultaneously. Here, new design strategy is reported emissive ambipolar even n‐type by introducing perfluorophenyl groups into polycyclic aromatic hydrocarbons such as perylene anthracene. The results reveal that 3,9‐diperfluorophenyl ( 5FDPP ) exhibits the semiconducting property hole electron mobilities up 0.12 1.89 cm 2 V −1 s , of 55%. One crystal forms 5FDPA blue emission an 52% simultaneously shows 2.65 which highest value among semiconductors. Furthermore, crystals utilized fabricate OLETs using Ag source–drain electrodes. electroluminescence detected in transporting channels external efficiency (EQE) 2.2%, current density 145 kA −2 values single‐component symmetric

Language: Английский

---