0000000001319761
AUTHOR
Armands Sebris
All-organic fast intersystem crossing assisted exciplexes exhibiting sub-microsecond thermally activated delayed fluorescence
A novel strategy is presented towards acquisition of exciplex systems exhibiting thermally activated delayed fluorescence (TADF) with a high reverse intersystem crossing (RISC) rate (exceeding 107 s−1). This approach involves constructing exciplex donor–acceptor molecular pairs, where the acceptor molecule possesses the ability to undergo fast and efficient intersystem crossing (ISC). With the use of 6-cyano-9-phenylpurine (PCP) acceptor and carbazole-based donor molecules, exciplexes were obtained, where the excitation is contained on PCP and undergoes fast ISC to form a local excited triplet state (3LEA). The controlled excitation transfer to the 3LEA level provides an optimal reverse int…
Energy level determination of purine containing blue light emitting organic compounds
Organic light emitting diodes (OLED) have found their applications in the mobile and TV screens. Till now the commercially available diodes are made by expensive thermal evaporation in a vacuum. The costs of OLED fabrication could be decreased by applying low-cost wet casting methods, for example, spin-coating. In this work, we have studied a group of blue light emitting purine derivatives which could potentially be used in OLEDs. The advantage of these compounds is their ability to form amorphous thin films from solutions. All the thin films were prepared by the spincoating method from chloroform solution on ITO glass. The position of hole and electron transport energy levels is important …
Photophysical and Electrical Properties of Highly Luminescent 2/6-Triazolyl-Substituted Push-Pull Purines.
This work is supported by the ERDF 1.1.1.1. activity project No. 1.1.1.1/16/A/131. The authors thank Dr. sc. ing. Jānis Zicāns and Dr. sc. ing. Remo Merijs Meri for DSC analyses.
CCDC 1988182: Experimental Crystal Structure Determination
Related Article: Kaspars Traskovskis, Armands Sebris, Irina Novosjolova, Māris Turks, Matas Guzauskas, Dmytro Volyniuk, Oleksandr Bezvikonnyi, Juozas V. Grazulevicius, Anatoly Mishnev, Raitis Grzibovskis, Aivars Vembris|2021|J.Mater.Chem.C|9|4532|doi:10.1039/D0TC05099G