Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Bicarbazole-Benzophenone Based Twisted D-A-D Derivatives as Blue Emitters for Highly Efficient Fluorescent OLEDs

Dovydas Blazevicius
,
Iram Siddiqui
,
Prakalp Gautam
,
Gintare Krucaite
,
Daiva Tavgeniene
ORCID logo ,
Mangey Ram Nagar
,
Krishan Kumar
ORCID logo ,
Subrata Banik
,
Jwo-Huei Jou
* ORCID logo ,
Saulius Grigalevicius
* ORCID logo
Version 1 : Received: 8 November 2023 / Approved: 9 November 2023 / Online: 9 November 2023 (07:48:37 CET)

A peer-reviewed article of this Preprint also exists.

Blazevicius, D.; Siddiqui, I.; Gautam, P.; Krucaite, G.; Tavgeniene, D.; Nagar, M.R.; Kumar, K.; Banik, S.; Jou, J.-H.; Grigalevicius, S. Bicarbazole-Benzophenone-Based Twisted Donor-Acceptor-Donor Derivatives as Blue Emitters for Highly Efficient Fluorescent Organic Light-Emitting Diodes. Nanomaterials 2024, 14, 146. Blazevicius, D.; Siddiqui, I.; Gautam, P.; Krucaite, G.; Tavgeniene, D.; Nagar, M.R.; Kumar, K.; Banik, S.; Jou, J.-H.; Grigalevicius, S. Bicarbazole-Benzophenone-Based Twisted Donor-Acceptor-Donor Derivatives as Blue Emitters for Highly Efficient Fluorescent Organic Light-Emitting Diodes. Nanomaterials 2024, 14, 146.

Abstract

Organic light-emitting diodes (OLEDs) have ushered in a technological revolution with their remarkable impact on diverse sectors of our daily lives. These versatile devices known for their outstanding display and lighting capabilities, have become indispensable components in various industries including smartphones, tablets, televisions, and automotive applications. This paper delves into the development of a group of twisted donor-acceptor-donor (D-A-D) derivatives incorporating bicarbazole and benzophenone structures for potential use as blue emitters in OLEDs. The synthesized compounds, namely DB14, DB23 and DB29, were designed with various alkyl side chains to enhance their film forming properties as for blue emitters. Characterization and evaluation of these derivatives included photophysical, electrochemical, thermal, and electroluminescent analysis. Some of the OLED devices incorporating these emitters demonstrated promising performance with maximum current efficiency (CEmax) of 2.6 cd/A and external quantum efficiency (EQEmax) of 5.3%. Notably, the DB23 emitter exhibited the highest EQE among all devices. The study also emphasizes the influence of host-guest energy transfer, optimal doping concentrations, and molecular structures on device performance. This research not only contributes to the understanding of advanced OLED materials but also provides insights into designing efficient blue emitters for future display and lighting applications, thereby advancing the field of organic electronics.

Keywords

Donor-acceptor-donor (D-A-D) derivatives; blue organic light emitting diode (OLED); high efficiency; blue emission; thermal analysis

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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