Abstract
The role of aggregation and isomeric impurities on the excited state mechanisms in crystalline carbazole are revisited considering exciton, Dexter energy transfer and electron transport based on Marcus and Marcus–Levich–Jortner theories.
Highlights
The field of organic optoelectronics has experienced significant growth in the last few decades
We have considered the formation of excited species localised on monomers and dimers in the Cz crystal as the initial step in the excited state mechanism
Due to the contradictory values of efficiencies and quantum yields obtained for materials synthesised by different groups, the interpretation of the processes underlying the ultralong organic phosphorescence (UOP) in Cz has been under debate.[20]
Summary
The field of organic optoelectronics has experienced significant growth in the last few decades. The development of novel organic luminophores, commonly, aggregated structures of p-conjugated materials in the solid phase, has boosted the design of new materials for technologies such as photovoltaics, solid-state lasers, phototherapy, molecular sensing, optical imaging, and spintronics, amongst others.[1,2,3,4,5,6] Since some of these applications benefit from long-lived excited states, achieving high populations of triplet states presents significant advantages. Metal-free organic chromophores have low spin–orbit couplings (SOCs) limiting the efficiency of intersystem crossing (ISC). Other pathways include heavyatom and halogen substitution as well as crystal engineering.[8,9,10]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
