TY - JOUR
T1 - Efficient Organic Light-Emitting Diode through Triplet Exciton Reharvesting by Employing Blended Electron Donor and Acceptor as the Emissive Layer
AU - Zhang, Lu
AU - Cai, Chao
AU - Li, King Fai
AU - Tam, Hoi Lam
AU - Chan, Kin Long
AU - Cheah, Kok Wai
N1 - This work was supported by Research Grants Council (AoE/P-02/12) and Innovation and Technology Commission (UIM/216).
PY - 2015/11/3
Y1 - 2015/11/3
N2 - A blended bimolecular exciplex formation was demonstrated between two individual donor and acceptor molecules, which are tris(4-carbazoyl-9-ylphenyl)amine (TCTA) and 2,4,6-tris(3′-(pyridin-3-yl)biphenyl-3-yl)-1,3,5-triazine (Tm3PyBPZ). The photoluminescence spectrum of the exciplex in the solid state showed an emission with a peak around 514 nm (∼2.49 eV). By applying this exciplex as an emitting layer, a highly efficient all-fluorescent organic lighting emitting diode with maximum efficiencies of 13.1% and 53.4 lm/W can be realized under an extremely low turn-on voltage of only 2.4 V. The thermally activated delayed fluorescence (TADF) process is believed to be responsible for the excellent device performance.
AB - A blended bimolecular exciplex formation was demonstrated between two individual donor and acceptor molecules, which are tris(4-carbazoyl-9-ylphenyl)amine (TCTA) and 2,4,6-tris(3′-(pyridin-3-yl)biphenyl-3-yl)-1,3,5-triazine (Tm3PyBPZ). The photoluminescence spectrum of the exciplex in the solid state showed an emission with a peak around 514 nm (∼2.49 eV). By applying this exciplex as an emitting layer, a highly efficient all-fluorescent organic lighting emitting diode with maximum efficiencies of 13.1% and 53.4 lm/W can be realized under an extremely low turn-on voltage of only 2.4 V. The thermally activated delayed fluorescence (TADF) process is believed to be responsible for the excellent device performance.
KW - organic light-emitting diode (OLED)
KW - intermolecular exciplex
KW - weak coupled donor and acceptor
KW - triplet exciton reharvesting
KW - thermally activated delayed fluorescence (TADF)
UR - http://www.scopus.com/inward/record.url?scp=84947738675&partnerID=8YFLogxK
U2 - 10.1021/acsami.5b05597
DO - 10.1021/acsami.5b05597
M3 - Journal article
AN - SCOPUS:84947738675
SN - 1944-8244
VL - 7
SP - 24983
EP - 24986
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 45
ER -