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oai:figshare.com:article/33835027 2026-09-16T08:51:45Z portal_1197 item_type_3 month_year_09_2026

Data for Room temperature enhancement of electronic materials by superacid analogues Sophie L. Pain (11896239) Nicholas E. Grant (6877136) John D. Murphy (6877151) Photoluminescence Electronics -- Materials Silicon Superacids Integrated circuits -- Passivation Transition metals Optoelectronics Migrated from ePrints 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.<br><br>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 2021-12-10T00:00:00Z Dataset Dataset 10.82444/warw.33835027.v1 https://figshare.com/articles/dataset/Data_for_Room_temperature_enhancement_of_electronic_materials_by_superacid_analogues/33835027 CC BY 4.0