TY - JOUR
T1 - Rational design of high efficiency green to deep red/near-infrared emitting materials based on isomeric donor-acceptor chromophores
AU - Zhang, Youming
AU - Chen, Zhao
AU - Song, Jun
AU - He, Junjie
AU - Wang, Xin
AU - Wu, Jiatao
AU - Chen, Shuming
AU - Qu, Junle
AU - Wong, Wai Yeung
PY - 2019/1/1
Y1 - 2019/1/1
N2 - A family of compounds TPA-BT-Q, TPA-pyT-N-naph, TPA-N-pyT-naph, and DPA-py-N-BT-naph with an isomeric donor-acceptor conjugation framework were designed and synthesized, and their structure-property relationships, theoretical calculations, and photophysical and electrochemical characteristics were investigated. These isomeric chromophores showed significantly different photophysical properties. Emission wavelengths spanning from the green to near-infrared region were observed in different solvents with high photoluminescence quantum yields, exceeding 90% in low polarity solvents and 44-88% in blend films. Organic light-emitting devices (OLEDs) displayed a strong electroluminescence with emission peaks at 592, 660, 630, and 580 nm; maximum current efficiencies of 7.92, 2.93, 3.56, and 15.37 cd A −1 ; maximum power efficiencies of 4.21, 1.56, 1.81, and 8.24 lm W −1 ; and maximum external quantum efficiencies of 3.15%, 2.75%, 2.66%, and 5.33% for TPA-BT-Q, TPA-pyT-N-naph, TPA-N-pyT-naph, and DPA-py-N-BT-naph doped OLEDs, respectively.
AB - A family of compounds TPA-BT-Q, TPA-pyT-N-naph, TPA-N-pyT-naph, and DPA-py-N-BT-naph with an isomeric donor-acceptor conjugation framework were designed and synthesized, and their structure-property relationships, theoretical calculations, and photophysical and electrochemical characteristics were investigated. These isomeric chromophores showed significantly different photophysical properties. Emission wavelengths spanning from the green to near-infrared region were observed in different solvents with high photoluminescence quantum yields, exceeding 90% in low polarity solvents and 44-88% in blend films. Organic light-emitting devices (OLEDs) displayed a strong electroluminescence with emission peaks at 592, 660, 630, and 580 nm; maximum current efficiencies of 7.92, 2.93, 3.56, and 15.37 cd A −1 ; maximum power efficiencies of 4.21, 1.56, 1.81, and 8.24 lm W −1 ; and maximum external quantum efficiencies of 3.15%, 2.75%, 2.66%, and 5.33% for TPA-BT-Q, TPA-pyT-N-naph, TPA-N-pyT-naph, and DPA-py-N-BT-naph doped OLEDs, respectively.
UR - http://www.scopus.com/inward/record.url?scp=85061657623&partnerID=8YFLogxK
U2 - 10.1039/c8tc05383a
DO - 10.1039/c8tc05383a
M3 - Journal article
AN - SCOPUS:85061657623
SN - 2050-7534
VL - 7
SP - 1880
EP - 1887
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 7
ER -