World-leading Exciplex Layers Created by Ossila's PhD Student

Posted on Wed, Aug 01, 2018 by Ashley Wong

Massive congratulations to our Excilight PhD student, Marco Collela on the publication of his recent paper: "Solution processable small molecule based TADF exciplex OLEDs (Colella, Pander, & Monkman, 2018)". Marco worked as part of a research team from Durham University. Whilst carrying out scientific research for this paper at Ossila, Marco was primarily supervised by our Senior Systems Engineer, Dr. Nick Scarratt.


Marco - Ossila PhD student from Excilight
Marco, Ossila's Excilight PhD student.


This paper has demonstrated the suitability of using small-molecule TADF exciplexes as solution-processable emissive layers for OLEDS.


The effects of the following variables on device performance were studied:

i) EML thickness

ii) DCz- DBTO2:TAPC ratio 


Specifically,  the devices studied were prepared from chlorobenzene, chloroform, and a 5:95 vol% blend of chlorobenzene:chloroform. It was found that with the solvent blend, results obtained were comparable to those obtained via evaporation deposition in terms of brightness, current efficiency, power efficiency and EQE. The best results obtained from this piece of research are 27.5 ± 3.5 cd/A, 16.5 ± 2.0 lm/W and EQE of 8.9 ± 0.6 % at the same DCz-DBTO2:TAPC wt% ratio of 30:70. 


Materials & Equipment Used in This Paper

Several materials and equipment from Ossila were used in this paper. They are available for purchase if you require them for your own research needs.

Author: Ashley Wong

Hailing from a Psychology background, Ashley has an MSc in Organizational/Work Psychology from the Sheffield University Management School. Prior to joining Ossila, Ashley worked with two multi-national organizations, researching emotional labour in the life insurance industry. In 2017, she successfully led the process of writing & applying for a prestigious Institute of Physics Business Innovation Award, which resulted in Ossila winning its first-ever industrial award.