PMID- 35839081
OWN - NLM
STAT- MEDLINE
DCOM- 20220729
LR  - 20220729
IS  - 1948-7185 (Electronic)
IS  - 1948-7185 (Linking)
VI  - 13
IP  - 29
DP  - 2022 Jul 28
TI  - Tuning Hybridized Local and Charge-Transfer Mixing for Efficient Hot-Exciton 
      Emission with Improved Color Purity.
PG  - 6664-6673
LID - 10.1021/acs.jpclett.2c01917 [doi]
AB  - Delayed fluorescence (DF) emitters with high color purity are of high interest 
      for applications in high-resolution displays. However, the charge transfer 
      required by high emitting efficiency usually conflicts with the expected color 
      purity. In this work, we investigated the S(1)/S(0) conformational relaxation, 
      spin-orbital coupling (SOC), and vibronic coupling of hot-exciton emitters while 
      hybrid local and charge transfer (HLCT) state tuning was achieved by a structural 
      meta-effect. The meta-linkage leads to suppressed S(1)/S(0) conformational 
      relaxation and weakened vibronic coupling, while the unsacrificed emitting 
      efficiency is largely ensured by multiple rISC channels (T(n) --> S(m)) with 
      thermally accessible triplet-singlet energy gap (DeltaE(ST)) and effective SOC. We 
      demonstrated that the unique excited-state mechanism provides opportunities to 
      improve the emitting color purity of hot-exciton emitters without sacrificing 
      emitting efficiency by HLCT state tuning with simple chemical structural 
      modification, for which hot-exciton emitters might play a more important role for 
      high-resolution organic light-emitting diode displays.
FAU - Wang, Yaxin
AU  - Wang Y
AD  - Institute of Molecular Plus, Tianjin University, Tianjin 300072, P.R. China.
FAU - Guo, Zilong
AU  - Guo Z
AD  - Institute of Molecular Plus, Tianjin University, Tianjin 300072, P.R. China.
FAU - Gao, Yixuan
AU  - Gao Y
AD  - Institute of Molecular Plus, Tianjin University, Tianjin 300072, P.R. China.
FAU - Tian, Yiran
AU  - Tian Y
AD  - Institute of Molecular Plus, Tianjin University, Tianjin 300072, P.R. China.
FAU - Deng, Yingyi
AU  - Deng Y
AD  - Institute of Molecular Plus, Tianjin University, Tianjin 300072, P.R. China.
FAU - Ma, Xiaonan
AU  - Ma X
AUID- ORCID: 0000-0002-3591-2451
AD  - Institute of Molecular Plus, Tianjin University, Tianjin 300072, P.R. China.
FAU - Yang, Wensheng
AU  - Yang W
AUID- ORCID: 0000-0003-2674-6751
AD  - Institute of Molecular Plus, Tianjin University, Tianjin 300072, P.R. China.
AD  - Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, 
      P.R. China.
LA  - eng
PT  - Journal Article
DEP - 20220715
PL  - United States
TA  - J Phys Chem Lett
JT  - The journal of physical chemistry letters
JID - 101526034
SB  - IM
MH  - *Fluorescence
EDAT- 2022/07/16 06:00
MHDA- 2022/07/30 06:00
CRDT- 2022/07/15 12:13
PHST- 2022/07/16 06:00 [pubmed]
PHST- 2022/07/30 06:00 [medline]
PHST- 2022/07/15 12:13 [entrez]
AID - 10.1021/acs.jpclett.2c01917 [doi]
PST - ppublish
SO  - J Phys Chem Lett. 2022 Jul 28;13(29):6664-6673. doi: 10.1021/acs.jpclett.2c01917. 
      Epub 2022 Jul 15.