Year

2017

Type(s)

Journal Article

Author(s)

Okazaki, M. and Takeda, Y. and Data, P. and Pander, P. and Higginbotham, H. and Monkman, A.P. and Minakata, S.

Source

Chemical Science, 8(4): 2677—2686, 2017

Url

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016463840&doi=10.1039%2fC6SC04863C&partnerID=40&md5=aedc55618b00a494d2b30ae79e59188a

BibTeX

BibTeX

BibTeX

@ARTICLE{Okazaki20172677, author={Okazaki, M. and Takeda, Y. and Data, P. and Pander, P. and Higginbotham, H. and Monkman, A.P. and Minakata, S.}, title={Thermally activated delayed fluorescent phenothiazine-dibenzo[a,j]phenazine-phenothiazine triads exhibiting tricolor-changing mechanochromic luminescence}, journal={Chemical Science}, year={2017}, volume={8}, number={4}, pages={2677-2686}, doi={10.1039/C6SC04863C}, note={cited By 25}, url={https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016463840&doi=10.1039%2fC6SC04863C&partnerID=40&md5=aedc55618b00a494d2b30ae79e59188a}, abstract={Novel U-shaped donor-acceptor-donor (D-A-D) π-conjugated multi-functional molecules comprising dibenzo[a,j]phenazine (DBPHZ) as an acceptor and phenothiazines (PTZ) as donors have been developed. Most importantly, the D-A-D compounds exhibit not only distinct tricolor-changeable mechanochromic luminescence (MCL) properties but also efficient thermally activated delayed fluorescence (TADF). Quantum chemical calculations, X-ray diffraction analysis, and systematic studies on the photophysical properties indicated that the “two-conformation-switchable” PTZ units play a highly important role in achieving multi-color-changing MCL. Time-resolved photophysical measurements revealed that the developed D-A-D compounds also exhibit efficient orange-TADF. Furthermore, organic light-emitting diode (OLED) devices fabricated with the new TADF emitters have achieved high external quantum efficiencies (EQEs) up to 16.8%, which significantly exceeds the theoretical maximum (∼5%) of conventional fluorescent emitters. © The Royal Society of Chemistry.}, document_type={Article}, source={Scopus},