Detail publikace

Electronic Structure of Exciplexes and the Role of Local Triplet States on Efficiency of Thermally Activated Delayed Fluorescence

Chapran, M. Sahalianov, I. Karaush-Karmazin, NN. Wiosna-Salyga, G. Glowacki, I. Luszczynska, B. Pander, P. Baryshnikov, GV.

Originální název

Electronic Structure of Exciplexes and the Role of Local Triplet States on Efficiency of Thermally Activated Delayed Fluorescence

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

In this work, we present an investigation of the electronic states in a series of thermally activated delayed fluorescence (TADF) exciplexes formed with the popular electron-transport compound TpBpTa and hole-transporting TCTA, TAPC, TPD10, TPD, and NPB. We rationalize the photophysical behavior of exciplexes by using computational methods and demonstrate that the reason for the commonly observed temporal red shift in the time-resolved spectra is related to the distribution of molecular conformations, thus CT energy, in film. We also use spectrally resolved thermoluminescence (SRTL) measurements to give insight into the trapping phenomena in exciplex blends. The results demonstrate that trapped charge carriers in the majority of studied exciplexes recombine through the luminescent intermolecular CT state. In addition, we report OLED devices using the said exciplexes in the emissive layer. The best performance is obtained with the TCTA:TpBpTa and TAPC:TpBpTa exciplexes showing maximum external quantum efficiencies (EQEs) of 8.8% and 7.2%, respectively.

Klíčová slova

exciplex; thermally activated delayed fluorescence; TADF; OLED; charge-trapping

Autoři

Chapran, M.; Sahalianov, I.; Karaush-Karmazin, NN.; Wiosna-Salyga, G.; Glowacki, I.; Luszczynska, B. ; Pander, P.; Baryshnikov, GV.

Vydáno

28. 3. 2023

Nakladatel

AMER CHEMICAL SOC

Místo

WASHINGTON

ISSN

2637-6113

Periodikum

ACS Applied Electronic Materials

Ročník

5

Číslo

3

Stát

Spojené státy americké

Strany od

1489

Strany do

1501

Strany počet

13

URL

https://pubs.acs.org/doi/10.1021/acsaelm.2c01518

BibTex

@article{BUT183779,
  author="Chapran, M. and Sahalianov, I. and Karaush-Karmazin, NN. and Wiosna-Salyga, G. and Glowacki, I. and Luszczynska, B. and Pander, P. and Baryshnikov, GV.",
  title="Electronic Structure of Exciplexes and the Role of Local Triplet States on Efficiency of Thermally Activated Delayed Fluorescence",
  journal="ACS Applied Electronic Materials",
  year="2023",
  volume="5",
  number="3",
  pages="1489--1501",
  doi="10.1021/acsaelm.2c01518",
  issn="2637-6113",
  url="https://pubs.acs.org/doi/10.1021/acsaelm.2c01518"
}