Graphene Quantum Dots: Controllable Singlet–Triplet Energy Splitting of Graphene Quantum Dots through Oxidation: From Phosphorescence to TADF (Adv. Mater. 31/2020). Issue 31 (4th August 2020)

• Record Type: Journal Article
• Authors: Park, Minsu; Kim, Hyung Suk; Yoon, Hyewon; Kim, Jin; Lee, Sukki; Yoo, Seunghyup; Jeon, Seokwoo
• Is Part Of: Advanced materials. Volume 32:Issue 31(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-08-04
• Subjects: anticounterfeiting -- graphene quantum dots -- phosphorescence -- singlet–triplet energy splitting -- thermally activated delayed fluorescence; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202070233
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract : In article number 2000936, Seunghyup Yoo, Seokwoo Jeon, and co‐workers introduce a novel concept for tuning singlet–triplet energy splitting of graphene quantum dots (GQDs) by oxidation control, which induces a dramatic afterglow transition from phosphorescence to thermally activated delayed fluorescence. Matrix‐assisted stabilization of triplet excited states provides ultralong lifetimes to such afterglow emissions at room‐temperature, which enables multilevel information security.