School of Physical Sciences
Jawaharlal Nehru University
Challenges of Organic Dual-State Light Emitters: Novel Thermal
Enhancement Mechanism and Data Security Protection
Debdas Ray
Department of Chemistry, Shiv Nadar University
Day and Date: Wednesday, 12th September, 2018
Time: 4:00 P.M.
Venue: Seminar Room, First Floor, SPS, JNU
Abstract: The emergence of single-component organic dual-state emitters holds great promise for white organic lightemitting diodes (WOLEDs), sensing and biological detection due to the involvement of both singlet and long-lived triplet states. However, dual-state light- emitting materials with: a) thermally activated delayed fluorescence (TADF) and roomtemperature phosphorescence (RTP), and b) biluminescence via fluorescence and persistent RTP features are currently limited. In addition, thermally enhanced photoluminescence, particularly phosphorescence property of such light emitters remains a challenge in photophysics due to predominant non-radiative pathways that quench emission at elevated temperatures. In this presentation, we will focus on our recent reports of dual-state emission of organic donor-acceptor conjugates. We will also address the thermal enhancement mechanism of light-emission above RT and how data security
protection application can be achieved by utilizing persistent RTP.
References:
1. J. Phys. Chem. Letters. 2018, 9, 2733-2738.
(ACS Livesilde: https://pubs.acs.org/doi/suppl/10.1021/acs.jpclett.8b00937)
2. J. Phys. Chem. Letters. 2018, 9, 3808-3813.
(ACS Liveslide: https://pubs.acs.org/doi/suppl/10.1021/acs.jpclett.8b01551)