Directional Charge Transport in Layered Two-Dimensional Triazine-Based Graphitic Carbon Nitride

0508576 - ÚOCHB 2020 RIV DE eng J - Journal Article
Noda, Y. - Merschjann, C. - Tarábek, Ján - Amsalem, P. - Koch, N. - Bojdys, M. J.
Directional Charge Transport in Layered Two-Dimensional Triazine-Based Graphitic Carbon Nitride.
Angewandte Chemie - International Edition. Roč. 58, č. 28 (2019), s. 9394-9398. ISSN 1433-7851. E-ISSN 1521-3773
Institutional support: RVO:61388963
Keywords : 2D materials * carbon nitride * layered compounds * semiconductors * thin films
OECD category: Physical chemistry
Impact factor: 12.959, year: 2019
Method of publishing: Limited access
https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201902314

Triazine-based graphitic carbon nitride (TGCN) is the most recent addition to the family of graphene-type, two-dimensional, and metal-free materials. Although hailed as a promising low-band-gap semiconductor for electronic applications, so far, only its structure and optical properties have been known. Here, we combine direction-dependent electrical measurements and time-resolved optical spectroscopy to determine the macroscopic conductivity and microscopic charge-carrier mobilities in this layered material beyond graphene. Electrical conductivity along the basal plane of TGCN is 65 times lower than through the stacked layers, as opposed to graphite. Furthermore, we develop a model for this charge-transport behavior based on observed carrier dynamics and random-walk simulations. Our combined methods provide a path towards intrinsic charge transport in a direction-dependent layered semiconductor for applications in field-effect transistors (FETs) and sensors.
Permanent Link: http://hdl.handle.net/11104/0299442