English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

There is a growing interest in obtaining high quality monolayer transitionmetal disulfides (TMDSs) for optoelectronic device applications. Surfacechemical treatments using a range of chemicals on monolayer TMDSs have proveneffective to improve their photoluminescence (PL) yield. However, theunderlying mechanism for PL enhancement by these treatments is not clear, whichprevents a rational design of passivation strategies. In this work, a simpleand effective approach to significantly enhance PL of TMDSs is demonstrated byusing a family of cation donors, which we show to be much more effective thancommonly used p-dopants which achieve PL enhancement through electron transfer.We develop a detailed mechanistic picture for the action of these cation donorsand demonstrate that one of them, Li-TFSI (bistriflimide), enhances the PL ofboth MoS2 and WS2 to a level double that compared to the widely discussed andcurrently best performing super acid H-TFSI treatment. In addition, the ionicsalts used in chemical treatments are compatible with a range of greenersolvents and are easier to handle than super-acids, which provides thepossibility of directly treating TMDSs during device fabrication. This worksets up rational selection rules for ionic chemicals to passivate TMDSs andincreases the potential of TMDSs in practical optoelectronic applications.

Mechanistic Insight to the Chemical Treatments of Monolayer Transition Metal Disulfides for Photoluminescence Enhancement