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Title:Photoexcited charge mobility in quasi two-dimensional polyacetylene
Authors:ID Pastukhova, Nadiia, Laboratory of Organic Matter Physics, University of Nova Gorica, Slovenia, Vipavska cesta, Slovenia (Author)
ID Liu, Kejun, Chair for Molecular Functional Materials, Center for Advancing Electronics Dresden, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Germany, 01069 Dresde, Alemania, Dresde, Germany (Author)
ID Dong, Renhao, Chair for Molecular Functional Materials, Center for Advancing Electronics Dresden, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Germany, 01069 Dresde, Alemania, Dresde, Germany (Author)
ID Bratina, Gvido, Laboratory of Organic Matter Physics, University of Nova Gorica, Slovenia, Vipavska cesta, Slovenia (Author)
ID Feng, Xinliang, Chair for Molecular Functional Materials, Center for Advancing Electronics Dresden, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Germany, 01069 Dresde, Alemania, Dresde, Germany (Author)
ID Pavlica, Egon, Laboratory of Organic Matter Physics, University of Nova Gorica, Slovenia, Vipavska cesta, Slovenia (Author)
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Language:English
Work type:Not categorized
Typology:1.12 - Published Scientific Conference Contribution Abstract
Organization:UNG - University of Nova Gorica
Abstract:Two-dimensional conjugated polymers (2DCPs) have been described and recognised as crystalline, one- to two-layer polymer nanosheets prepared by 2D covalent polymerization exhibiting strong in-plane π-electron delocalization with two orthogonal directions and weak out-of-plane π-π stacking.[1,2] The extension of polymer dimensionality into two dimensions improves the alignment of individual polymer sheets and overcomes the limitations associated with charge carrier hopping between polymer chains in one-dimensional and crosslinked polymers.[3] Compared to other two-dimensional materials such as graphene or transition metal dichalcogenides, 2DCPs offer a high degree of flexibility in chemical design and are compatible with liquid-based processing methods. Various 2DCPs have been synthesised by surfactant monolayer-assisted interfacial synthesis (SMAIS).[5] Of particular interest is the photoresponse of these materials due to their tunable properties, such as bandgap and associated wavelength-dependent photoexcitation, which enables a wide range of applications in optoelectronic devices. Using time-of-flight photoconductivity (TOF-PC) measurements [4], we investigate the charge transport properties of 2D polyacetylene prepared by SMAIS method. We preform TOF-PC measurement of 2D polyacetylene using a focused nanosecond pulse laser at 325 nm and electrode separation of 250 µm. From the bias polarity and time duration of the photocurrent, we can determine the polarity, velocity and mobility of photoexcited charge carriers as a function of applied bias voltage and excitation wavelength. Using excitation at 325 m, we observed an electron mobility in the range of 150 cm2 V-1 s-1, which is in the realm of most advances small-molecule single-crystal organic semiconductors and almost an order of magnitude higher than linear polymeric semiconductors.
Keywords:Two-dimensional conjugated polymers, 2DCPs, 2Dpolymers, charge mobility, time-of-flight photoconductivity
Publication status:Published
Year of publishing:2022
PID:20.500.12556/RUNG-7760 New window
COBISS.SI-ID:131422211 New window
NUK URN:URN:SI:UNG:REP:URYEJWXK
Publication date in RUNG:29.11.2022
Views:1177
Downloads:0
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Record is a part of a monograph

Title:Organic 2D crystalline materials (O2DMAT)
Place of publishing:Madrid, Spain
Year of publishing:2022
Conference organizer:nanoGe

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:Z1-3189
Name:Transportne lastnosti dvodimenzionalnih konjugiranih polimerov

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