Growing two-dimensional single crystals of organic semiconductors on liquid surfaces

Abstract The past several decades have witnessed a vast array of developments in printable organic semiconductors, where successes both in synthetic chemistry and in printing technology constituted a key step forward to realization of printed electronics. In this review, we highlight specifically on materials science, charge transport, and device engineering of —two-dimensional single crystals—. Defect-free organic single-crystalline wafers manufactured via a one-shot printing process allows remarkably reliable implementations of organic thin-film transistors with decently high carrier mobility up to 10 cm2 V-1 s-1, which has revolutionized the current printing electronics to be able to meet looming IoT challenges. This review focuses on the perspective of printing two-dimensional single crystals with reasonable areal coverage, showing their promising applications for practical devices and future human society, particularly based on our recent contributions.

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Design and Synthesis of Two-Dimensional Covalent Organic Frameworks with Four-Arm Cores: Prediction of Remarkable Ambipolar Charge-Transport Properties

10.26434/chemrxiv.7766786.v2 ◽

2019 ◽

Author(s):

Simil Thomas ◽

Hong Li ◽

Raghunath R. Dasari ◽

Austin Evans ◽

William Dichtel ◽

...

Keyword(s):

Charge Transport ◽

Organic Semiconductors ◽

Density Functional ◽

Polymer Networks ◽

Two Dimensional ◽

Covalent Organic Frameworks ◽

X Ray Diffraction ◽

Zinc Porphyrin ◽

Design And Synthesis ◽

Predicted Values

We have considered three two-dimensional (2D) π-conjugated polymer networks (i.e., covalent organic frameworks, COFs) materials based on pyrene, porphyrin, and zinc-porphyrin cores connected via diacetylenic linkers. Their electronic structures, investigated at the density functional theory global-hybrid level, are indicative of valence and conduction bands that have large widths, ranging between 1 and 2 eV. Using a molecular approach to derive the electronic couplings between adjacent core units and the electron-vibration couplings, the three π-conjugated 2D COFs are predicted to have ambipolar charge-transport characteristics with electron and hole mobilities in the range of 65-95 cm2V-1s-1. Such predicted values rank these 2D COFs among the highest-mobility organic semiconductors. In addition, we have synthesized the zinc-porphyrin based 2D COF and carried out structural characterization via powder X-ray diffraction and surface area analysis, which demonstrates the feasability of these electroactive networks.

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High Mobility Two-Dimensional Bismuth Oxyselenide Single Crystals with Large Grain Size Grown by Reverse-Flow Chemical Vapor Deposition

ACS Applied Materials & Interfaces ◽

10.1021/acsami.1c13491 ◽

2021 ◽

Author(s):

Xi Yang ◽

Qi Zhang ◽

Yingchao Song ◽

Yansong Fan ◽

Yuwen He ◽

...

Keyword(s):

Grain Size ◽

Chemical Vapor Deposition ◽

Single Crystals ◽

Vapor Deposition ◽

Reverse Flow ◽

High Mobility ◽

Chemical Vapor ◽

Two Dimensional

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Growth direction dependent separate-channel charge transport in organic weak charge-transfer co-crystal of anthracene-DTTCNQ

Materials Horizons ◽

10.1039/d1mh01767e ◽

2022 ◽

Author(s):

Hui Jiang ◽

Jun Ye ◽

Peng Hu ◽

Shengli Zhu ◽

Yanqin Liang ◽

...

Keyword(s):

Charge Transfer ◽

Charge Transport ◽

Electronic Properties ◽

Single Crystals ◽

Organic Semiconductors ◽

Crystal Engineering ◽

Molecular Crystal ◽

Growth Direction ◽

Weak Charge ◽

Separate Channel

Co-crystallization is an efficient way of molecular crystal engineering to tune the electronic properties of organic semiconductors. In this work, we synthesized anthracene-4,8-bis(dicyanomethylene)4,8-dihydrobenzo[1,2-b:4,5-b’]-dithiophene (DTTCNQ) single crystals as a template to...

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The Layered Structure of Cu2(H2O)4[C4H4N2][C6H2(COO)4]·2H2O

10.31219/osf.io/456p8 ◽

2019 ◽

Author(s):

Roberto Köferstein

Keyword(s):

Nitrogen Atom ◽

Single Crystals ◽

Silica Gel ◽

Layered Structure ◽

Water Molecules ◽

Two Dimensional ◽

Space Group ◽

Distorted Octahedral ◽

Oxygen Atoms

Triclinic single crystals of Cu2(H2O)4[C4H4N2][C6H2(COO)4]·2H2O have been grown in anaqueous silica gel. Space group P-1 (Nr. 2), a = 723.94(7) pm, b = 813.38(14) pm, c = 931.0(2) pm, α = 74.24(2)°, β = 79.24(2)°, γ = 65.451(10)°, V = 0.47819(14) nm3, Z = 1. Cu2+ is coordinated in a distorted, octahedral manner by two water molecules, three oxygen atoms ofthe pyromellitate anions and one nitrogen atom of pyrazine (Cu—O 194.1(2)–229.3(3) pm;Cu–N 202.0(2) pm). The connection of Cu2+ and [C6H2(COO)4)]4− yields infinite strands,which are linked by pyrazine molecules to form a two-dimensional coordination polymer.Thermogravimetric analysis in air showed that the dehydrated compound was stable between175 and 248 °C. Further heating yielded CuO.

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Crystal Structure of Eu2PdSi3

Zeitschrift für Naturforschung B ◽

10.1515/znb-2003-1007 ◽

2003 ◽

Vol 58 (10) ◽

pp. 971-974 ◽

Cited By ~ 13

Author(s):

U. Ch. Rodewald ◽

R.-D. Hoffmann ◽

R. Pöttgen ◽

E.V. Sampathkumaran

Keyword(s):

Crystal Structure ◽

Single Crystal ◽

Single Crystals ◽

Two Dimensional ◽

Silica Tube ◽

Variable Parameters ◽

X Ray

Single crystals of Eu2PdSi3 were obtained from an arc-melted sample that was further annealed at 1020 K for seven days in a silica tube. The structure of Eu2PdSi3 was refined from single crystal X-ray diffractometer data: P6/mmm, a = 831.88(12), c = 435.88(9) pm, wR2 = 0.1175, 265 F2 values, and 13 variable parameters. It crystallizes with the U2RuSi3 structure, a superstructure of the AlB2 type. The palladium and silicon atoms form a planar two-dimensional [PdSi3] network. The two crystallographically different europium atoms have hexagonal prismatic coordinations Eu1Si12 and Eu2Pd4Si8. The Pd-Si and Si-Si distances within the [PdSi3] network are 244 and 236 pm, respectively.

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Soft template assisted self-assembly: a general strategy toward two-dimensional molecular crystals for high-performance organic field-effect transistors

Journal of Materials Chemistry C ◽

10.1039/d1tc04307b ◽

2022 ◽

Author(s):

Xinzi Tian ◽

Jiarong Yao ◽

Siyu Guo ◽

Zhaofeng Wang ◽

Yanling Xiao ◽

...

Keyword(s):

Organic Semiconductors ◽

Self Assembly ◽

High Performance ◽

Field Effect Transistors ◽

Molecular Crystals ◽

Soft Template ◽

General Strategy ◽

Two Dimensional ◽

Organic Field Effect Transistors ◽

Intrinsic Properties

Two-dimensional molecular crystals (2DMCs) are highly desirable to probe the intrinsic properties in organic semiconductors and are promising candidates for constructing high-performance optoelectronic devices. Liquids such as water are favorable...

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