Efficient Persistent Room Temperature Phosphorescence in Organic Amorphous Materials under Ambient Conditions

Abstract

excitation beam still remained after the second scan. Demonstrations of effi cient persistent RTP in pure organic host-guest fi lms showing other phosphorescence colors are shown in Supporting Information Movies S1 to S4. In addition to long RTP lifetimes (a few seconds), these materials have RTP quantum effi ciencies of > 10% for RGB RTP in air.www.afm-journal.de www.MaterialsViews.com wileyonlinelibrary.com

Translating efficient fluorescence into persistent room-temperature phosphorescence by doping bipolar fluorophores into polar polymer matrix

“…Similar k nr (9.55 Â 10 À1 s À1 of 7-AMCum@PAA and 9.57 Â 10 À1 s À1 of 7-DEAMCum@PAA) but higher k p (4.49 Â 10 À1 s À1 ) of 7-DEAMCum@PAA rendered its high f p (Table 1). Consistent with the report by Hirata et al, 52,53 introducing secondary amino substituents can significantly improve k p without a large increase of k nr . Thus, the high f p value of 7-DEAMCum@PAA was ascribed to the presence of a secondary amino group.…”

Aggregation-Induced Enhancement of Molecular Phosphorescence Lifetime: A First-Principle Study

“…Besides, for phosphorescence emission, persistent lifetime is accompanied with low efficiency. 54 This is consistent with the equation of phosphorescence lifetime:…”

“…The incorporation of F and S atoms results in delocalized T 1 , which will ultimately lead to the annihilation of excitons by molecular vibrations or rotations. Besides, for phosphorescence emission, persistent lifetime is accompanied with low efficiency . This is consistent with the equation of phosphorescence lifetime: τ = c 3 /[2­(Δ E ) 2 · f ].…”

Induction of long-lived room temperature phosphorescence of carbon dots by water in hydrogen-bonded matrices

“…4c, d , Table 3 and Supplementary Note 1 ). Usually, the phosphorescence intensity increases as the temperature decreases 30 , 46 ; however, our results were different. As shown in Supplementary Fig.…”