Thermally Activated Gold‐Mediated Transition Metal Dichalcogenide Exfoliation and a Unique Gold‐Mediated Transfer

Heyl, Max; Burmeister, David; Schultz, Thorsten; Pallasch, Sebastian; Ligorio, Giovanni; Koch, Norbert; List‐Kratochvil, Emil J. W.

doi:10.1002/pssr.202000408

Cited by 32 publications

(44 citation statements)

References 26 publications

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“…pores) and heteroatoms by design are researched to make up for the missing band gap of graphene. Most notably transition metal dichalcogenides, graphene derivatives and designer covalent organic frameworks (COFs) compete to be the next generation semiconductor [8–12] …”

Section: Introductionmentioning

confidence: 99%

Optimized Synthesis of Solution‐Processable Crystalline Poly(Triazine Imide) with Minimized Defects for OLED Application

et al. 2021

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Poly(triazine imide) (PTI) is a highly crystalline semiconductor, and though no techniques exist that enable synthesis of macroscopic monolayers of PTI, it is possible to study it in thin layer device applications that are compatible with its polycrystalline, nanoscale morphology. We find that the by‐product of conventional PTI synthesis is a C−C carbon‐rich phase that is detrimental for charge transport and photoluminescence. An optimized synthetic protocol yields a PTI material with an increased quantum yield, enabled photocurrent and electroluminescence. We report that protonation of the PTI structure happens preferentially at the pyridinic N atoms of the triazine rings, is accompanied by exfoliation of PTI layers, and contributes to increases in quantum yield and exciton lifetimes. This study describes structure–property relationships in PTI that link the nature of defects, their formation, and how to avoid them with the optical and electronic performance of PTI. On the basis of our findings, we create an OLED prototype with PTI as the active, metal‐free material.

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Section: Introductionmentioning

confidence: 99%

Optimized Synthesis of Solution‐Processable Crystalline Poly(Triazine Imide) with Minimized Defects for OLED Application

et al. 2021

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“…Recently, the Au-assisted exfoliation method has shown success in the separation of monolayer 2D materials over a centimeter size [ 55 ]. In brief, the Au film is first deposited onto a target substrate [ 56 ]. Then, the tape with exfoliated 2D material is stuck onto the Au surface.…”

Section: Synthesis Methods For Obtaining Pdsementioning

confidence: 99%

Applications of 2D-Layered Palladium Diselenide and Its van der Waals Heterostructures in Electronics and Optoelectronics

et al. 2021

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The rapid development of two-dimensional (2D) transition-metal dichalcogenides has been possible owing to their special structures and remarkable properties. In particular, palladium diselenide (PdSe2) with a novel pentagonal structure and unique physical characteristics have recently attracted extensive research interest. Consequently, tremendous research progress has been achieved regarding the physics, chemistry, and electronics of PdSe2. Accordingly, in this review, we recapitulate and summarize the most recent research on PdSe2, including its structure, properties, synthesis, and applications. First, a mechanical exfoliation method to obtain PdSe2 nanosheets is introduced, and large-area synthesis strategies are explained with respect to chemical vapor deposition and metal selenization. Next, the electronic and optoelectronic properties of PdSe2 and related heterostructures, such as field-effect transistors, photodetectors, sensors, and thermoelectric devices, are discussed. Subsequently, the integration of systems into infrared image sensors on the basis of PdSe2 van der Waals heterostructures is explored. Finally, future opportunities are highlighted to serve as a general guide for physicists, chemists, materials scientists, and engineers. Therefore, this comprehensive review may shed light on the research conducted by the 2D material community.

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“…Most notably transition metal dichalcogenides, graphene derivatives and designer covalent organic frameworks (COFs) compete to be the next generation semiconductor. [8][9][10][11][12] Graphitic carbon nitrides combine two important characteristics: (i) they are overall sp 2 -hybridised and covalently bonded, and (ii) they consist of earth abundant, light elements (i.e. they are metal free).…”

Section: Introductionmentioning

confidence: 99%

OLED from solution-processed crystalline poly(triazine imide)

Burmeister

Tran

Müller

et al. 2021

Preprint

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Crystalline semiconducting carbon nitrides are chemically and physically resilient, consist of earth abundant elements, and can be exfoliated into 2D atomically thin layers. In particular, poly(triazine imide) (PTI) is a highly crystalline semiconductor, and though no techniques exist to date that enable synthesis of macroscopic monolayers of PTI, it is possible to study it in thin layer device applications that are compatible with its polycrystalline, nanoscale morphology. In our study, we find that the by-product of conventional PTI synthesis is a C-C carbon rich phase that is detrimental for charge transport and photoluminescence. An optimised synthetic protocol yields a PTI material with an increased quantum yield, enabled photocurrent and electroluminescence. In addition, we report that protonation of the PTI structure happens preferentially at the pyridinic nitrogen atoms of the triazine (C3N3) rings, is accompanied by exfoliation of PTI layers, and contributes to increases in quantum yield and exciton lifetimes. This study describes structure-property relationships in PTI that link (i) the nature of defects, their formation, and how to avoid them with (ii) the optical and electronic performance of PTI. On the basis of our findings, we create an OLED prototype with PTI as the active, metal-free material, and we lay the foundations for device integration of solution-processable graphitic carbon nitride dispersions in semiconductor devices.

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Thermally Activated Gold‐Mediated Transition Metal Dichalcogenide Exfoliation and a Unique Gold‐Mediated Transfer

Cited by 32 publications

References 26 publications

Optimized Synthesis of Solution‐Processable Crystalline Poly(Triazine Imide) with Minimized Defects for OLED Application

Optimized Synthesis of Solution‐Processable Crystalline Poly(Triazine Imide) with Minimized Defects for OLED Application

Applications of 2D-Layered Palladium Diselenide and Its van der Waals Heterostructures in Electronics and Optoelectronics

OLED from solution-processed crystalline poly(triazine imide)

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