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Data for Room temperature enhancement of electronic materials by superacid analogues
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Pain, Sophie L., Grant, Nicholas E. and Murphy, John D. (2021) Data for Room temperature enhancement of electronic materials by superacid analogues. [Dataset]
Plain Text (Readme file)
readme file for WRAP.txt - Published Version Available under License Creative Commons Attribution 4.0. Download (545b) |
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Archive (ZIP) (Dataset)
WRAP dataset 160908.zip - Published Version Available under License Creative Commons Attribution 4.0. Download (1225Kb) |
Official URL: http://wrap.warwick.ac.uk/160908/
Abstract
Treatment with the superacid bis(trifluoromethanesulfonyl)amide (sometimes known as TFSA, TFSI, or HNTf2) enhances the properties of a wide range of optoelectronic materials, resulting in longer effective carrier lifetimes and higher photoluminescence quantum yields. We have conducted a multimaterial study treating both crystalline silicon and transition metal dichalcogenide (TMDC) monolayers and few-layer flakes with solutions formed from TFSA and a range of compounds with related chemical structures with different Lewis acidities, in order to elucidate the factors underpinning the TFSA-related class of enhancement treatments. We adopt dichloromethane (DCM) as a common solvent as it provides good results at room temperature and is potentially less hazardous than TFSA-dichloroethane (DCE) heated to ∼100 °C, which has been used previously. Kelvin probe experiments on silicon demonstrate that structurally similar chemicals give passivating films with substantially different charge levels, with the higher levels of charge associated with the presence of CF3SO2 groups resulting in longer effective lifetimes due to an enhancement in field-effect passivation. Treatment with all analogue solutions used results in enhanced photoluminescence in MoS2 and WS2 compared to untreated controls. Importantly we find that MoS2 and WS2 can be enhanced by analogues to TFSA that lack sulfonyl groups, meaning an alternative mechanism to that proposed in computational reports for TFSA enhancement must apply.
Item Type: | Dataset | ||||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
Type of Data: | XLSX format | ||||||||
Library of Congress Subject Headings (LCSH): | Photoluminescence, Electronics -- Materials, Silicon, Superacids, Integrated circuits -- Passivation, Transition metals, Optoelectronics | ||||||||
Publisher: | University of Warwick, School of Engineering | ||||||||
Official Date: | 10 December 2021 | ||||||||
Dates: |
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Status: | Not Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Media of Output (format): | .xlsx | ||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||
Copyright Holders: | University of Warwick | ||||||||
Description: | The dataset (a single file in XLSX format) contains the data behind the figures in the paper. Captions to the figures are given in the paper. Abbreviations, variables and methods used are defined in the paper. Please address any queries to sophie.pain@warwick.ac.uk or john.d.murphy@warwick.ac.uk |
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Date of first compliant deposit: | 10 December 2021 | ||||||||
Date of first compliant Open Access: | 10 December 2021 | ||||||||
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