Article

Aromatic Phosphonates: A Novel Group of Emitters Showing Blue Ultralong Room Temperature Phosphorescence

Heidi ThomasDresden Integrated Center for Applied Physics and Photonic Materials (IAPP) Technische Universität Dresden Hermann‐Krone‐Bau, Nöthnitzer Str. 61 Dresden 01187 GermanyDominik L. PastoetterChair of Molecular Functional Materials Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry Technische Universität Dresden Dresden 01062 GermanyMax GmelchDresden Integrated Center for Applied Physics and Photonic Materials (IAPP) Technische Universität Dresden Hermann‐Krone‐Bau, Nöthnitzer Str. 61 Dresden 01187 GermanyTim AchenbachDresden Integrated Center for Applied Physics and Photonic Materials (IAPP) Technische Universität Dresden Hermann‐Krone‐Bau, Nöthnitzer Str. 61 Dresden 01187 GermanyAnnika SchlöglDresden Integrated Center for Applied Physics and Photonic Materials (IAPP) Technische Universität Dresden Hermann‐Krone‐Bau, Nöthnitzer Str. 61 Dresden 01187 GermanyMarine LouisDresden Integrated Center for Applied Physics and Photonic Materials (IAPP) Technische Universität Dresden Hermann‐Krone‐Bau, Nöthnitzer Str. 61 Dresden 01187 GermanyXinliang FengChair of Molecular Functional Materials Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry Technische Universität Dresden Dresden 01062 GermanySebastian ReinekeDresden Integrated Center for Applied Physics and Photonic Materials (IAPP) Technische Universität Dresden Hermann‐Krone‐Bau, Nöthnitzer Str. 61 Dresden 01187 Germany

2020en

ABI

Abstract

In recent years, there has been a growing interest in purely organic materials showing ultralong room-temperature phosphorescence with lifetimes in the range of seconds. Still, the longest known phosphorescence lifetimes are only achieved with crystalline systems so far. Here, a rational design of a completely new family of halogen-free organic luminescent derivatives in amorphous matrices, displaying both conventional fluorescence and phosphorescence is reported. Hydrogen bonding between the newly developed emitters and an ethylene-vinyl alcohol copolymer (Exceval) matrix, which efficiently suppresses vibrational dissipation, enables bright long-lived phosphorescence with lifetimes up to 2.6 s at around 480 nm. The importance of the chosen matrix is shown as well as the implementation in an organic programmable luminescent tag.

Identifiers

DOI: 10.1002/adma.202000880

Citations and references

Cited by 20 references

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