Realization of vertical and lateral van der Waals heterojunctions using two-dimensional layered organic semiconductors

Zhang, Yuhan; Luo, Zhongzhong; Hu, Fu-Gang; Nan, Haiyan; Wang, Xiaoyong; Ni, Zhenhua; Xu, Jianbin; Shi, Yi; Wang, Xinran

doi:10.1007/s12274-017-1442-5

Cited by 31 publications

(31 citation statements)

References 47 publications

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“…A careful study of similar C 60 ‐based vertical transistors revealed that the change in the injected current was not only due to a modulation of the energy barrier, but also to the fact that the graphene layer does not perfectly screen the gate electric field, which extends in the C 60 layer causing a local redistribution of charge carriers. Analogous results were demonstrated in very similar C 60 ‐based vertical transistors, as well as in other n‐ and p‐type organic semiconductors. Moreover, a complementary inverter was fabricated by connecting an n‐type and a p‐type vertical transistors.…”

Section: Van Der Waals Heterostructures: a Device Perspectivesupporting

confidence: 77%

When 2D Materials Meet Molecules: Opportunities and Challenges of Hybrid Organic/Inorganic van der Waals Heterostructures

2018

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van der Waals heterostructures, composed of vertically stacked inorganic 2D materials, represent an ideal platform to demonstrate novel device architectures and to fabricate on-demand materials. The incorporation of organic molecules within these systems holds an immense potential, since, while nature offers a finite number of 2D materials, an almost unlimited variety of molecules can be designed and synthesized with predictable functionalities. The possibilities offered by systems in which continuous molecular layers are interfaced with inorganic 2D materials to form hybrid organic/inorganic van der Waals heterostructures are emphasized. Similar to their inorganic counterpart, the hybrid structures have been exploited to put forward novel device architectures, such as antiambipolar transistors and barristors. Moreover, specific molecular groups can be employed to modify intrinsic properties and confer new capabilities to 2D materials. In particular, it is highlighted how molecular self-assembly at the surface of 2D materials can be mastered to achieve precise control over position and density of (molecular) functional groups, paving the way for a new class of hybrid functional materials whose final properties can be selected by careful molecular design.

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Section: Van Der Waals Heterostructures: a Device Perspectivesupporting

confidence: 77%

When 2D Materials Meet Molecules: Opportunities and Challenges of Hybrid Organic/Inorganic van der Waals Heterostructures

2018

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“…Interfaces between organic semiconductors and 2D materials show great promise for future applications in electronics, optoelectronics, and sensing . Going beyond extended organic layers and vertical heterostructures by employing inherent self‐assembly and self‐alignment of organic nanostructures on 2D materials can enable many novel functionalities.…”

Section: Resultsmentioning

confidence: 99%

“…In the case of organic semiconductors, hBN has been successfully used as gate dielectric for organic‐FETs with epitaxially grown rubrene, pentacene, C 60 , and C 8 ‐BTBT channel materials . Furthermore, vertical and lateral heterostructures of pentacene and C 8 ‐BTBT have been realized on hBN . While the applications above mentioned rely on extended organic semiconductor layers on hBN, an interesting alternative approach is to use self‐assembled and self‐aligned quasi‐1D nanostructures .…”

Section: Introductionmentioning

confidence: 99%

Light‐Assisted Charge Propagation in Networks of Organic Semiconductor Crystallites on Hexagonal Boron Nitride

Matković

Genser

Kratzer

et al. 2019

Adv Funct Materials

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Introducing organic semiconductors as additional building blocks into heterostructures of 2D materials widens the horizon of their applications. Organic molecules can form self-assembled and self-aligned crystalline nanostructures on 2D materials, resulting in well-defined interfaces that preserve the intrinsic properties of both constituents. Thus, organic molecules add unique capabilities to van der Waals heterostructures that have no analogues in inorganic matter. This study explores light-assisted charge propagation in organic semiconductor networks of quasi-1D needle-like crystallites, epitaxially grown on insulating hexagonal boron nitride. Electrostatic force microscopy is employed to demonstrate that upon external illumination it is possible to change the conductivity of organic crystallites by more than two orders of magnitude. Furthermore, by exploiting the highly anisotropic optical properties of the organic nanoneedles, a selective charge propagation along the crystallites is triggered that matches the orientation of the molecular backbones with the incident light's polarization direction. These results demonstrate the possibility to use a "light-gate" to switch on the conductivity of organic nanostructures and even to guide the charge propagation along desired directions in self-assembled crystallite networks.

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“…Despite the rapid development of 2D p–n junction based on TMDs, only a few studies have demonstrated all organic 2D layered p–n junctions . By carefully tuning the deposition parameters, the monolayer PTCDA followed by a few monolayers of the C 8 ‐BTBT p–n junction are formed on a graphene substrate.…”

Section: Applications In Electronic and Optoelectronic Devicesmentioning

confidence: 99%

2D Organic Materials for Optoelectronic Applications

et al. 2017

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The remarkable merits of 2D materials with atomically thin structures and optoelectronic attributes have inspired great interest in integrating 2D materials into electronics and optoelectronics. Moreover, as an emerging field in the 2D-materials family, assembly of organic nanostructures into 2D forms offers the advantages of molecular diversity, intrinsic flexibility, ease of processing, light weight, and so on, providing an exciting prospect for optoelectronic applications. Herein, the applications of organic 2D materials for optoelectronic devices are a main focus. Material examples include 2D, organic, crystalline, small molecules, polymers, self-assembly monolayers, and covalent organic frameworks. The protocols for 2D-organic-crystal-fabrication and -patterning techniques are briefly discussed, then applications in optoelectronic devices are introduced in detail. Overall, an introduction to what is known and suggestions for the potential of many exciting developments are presented.

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Realization of vertical and lateral van der Waals heterojunctions using two-dimensional layered organic semiconductors

Cited by 31 publications

References 47 publications

When 2D Materials Meet Molecules: Opportunities and Challenges of Hybrid Organic/Inorganic van der Waals Heterostructures

When 2D Materials Meet Molecules: Opportunities and Challenges of Hybrid Organic/Inorganic van der Waals Heterostructures

Light‐Assisted Charge Propagation in Networks of Organic Semiconductor Crystallites on Hexagonal Boron Nitride

2D Organic Materials for Optoelectronic Applications

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