Fast spin-flip enables efficient and stable organic electroluminescence from charge-transfer states

LS Cui, AJ Gillett, SF Zhang, H Ye, Y Liu, XK Chen… - Nature …, 2020 - nature.com
A spin-flip from a triplet to a singlet excited state, that is, reverse intersystem crossing (RISC),
is an attractive route for improving light emission in organic light-emitting diodes, as shown …

Thermally activated delayed fluorescent donor–acceptor–donor–acceptor π-conjugated macrocycle for organic light-emitting diodes

S Izumi, HF Higginbotham, A Nyga… - Journal of the …, 2020 - ACS Publications
A new class of thermally activated delayed fluorescent donor–acceptor–donor–acceptor (D–
A–D–A) π-conjugated macrocycle comprised of two U-shaped electron-acceptors (dibenzo …

Dielectric control of reverse intersystem crossing in thermally activated delayed fluorescence emitters

AJ Gillett, A Pershin, R Pandya, S Feldmann… - Nature materials, 2022 - nature.com
Thermally activated delayed fluorescence enables organic semiconductors with charge
transfer-type excitons to convert dark triplet states into bright singlets via reverse intersystem …

Bridge-mediated charge separation in isomeric N-annulated perylene diimide dimers

Y Guo, Z Ma, X Niu, W Zhang, M Tao… - Journal of the …, 2019 - ACS Publications
The possibility and rate of charge separation (CS) in donor–bridge–acceptor molecules
mainly depend on two factors: electronic coupling and solvent effects. The question of how …

Transient Absorption Spectroscopy of a Carbazole-Based Room-Temperature Phosphorescent Molecule: Real-Time Monitoring of Singlet–Triplet Transitions

Y Yang, Z Jiang, Y Liu, T Guan, Q Zhang… - The Journal of …, 2022 - ACS Publications
Real-time monitoring of singlet–triplet transitions is an effective tool for studying room-
temperature phosphorescent molecules. For femtosecond transient absorption (TA) …

Synthesis, Characterization, and Properties of Three-Dimensional Analogues of 9-Borafluorenes

C Zhang, J Wang, Z Lin, Q Ye - Inorganic Chemistry, 2022 - ACS Publications
Three-dimensional (3D) analogues of 9-borafluorenes,(C2B10H10) 2BR (R= Cl (1), Br (2), H
(3, merely as ether or silane adduct), phenyl (4), mesityl (5)), were synthesized and fully …

Engineering singlet and triplet excitons of TADF emitters by different host‐guest interactions

W Zhang, J Kong, RZ An, J Zhang, Y Zhou, LS Cui… - …, 2024 - Wiley Online Library
Understanding the host‐guest interactions for thermally activated delayed fluorescence
(TADF) emitters is critical because the interactions between the host matrices and TADF …

New direct approach for determining the reverse intersystem crossing rate in organic thermally activated delayed fluorescent (TADF) emitters

RJ Vázquez, JH Yun, AK Muthike… - Journal of the …, 2020 - ACS Publications
We developed a new optical method to determine the rate of reverse intersystem crossing (k
rISC) in thermally activated delayed fluorescent (TADF) organic chromophores using time …

Dihedral angle distribution of thermally activated delayed fluorescence molecules in solids induces dual phosphorescence from charge-transfer and local triplet states

SJ Woo, YH Kim, JJ Kim - Chemistry of Materials, 2021 - ACS Publications
Donor− π–acceptor structured thermally activated delayed fluorescence (TADF) molecules
are likely to have distributions of dihedral angles in solids. However, the impact of the …

Conformational emissive states in dual-state emitters with benzotriazole acceptors

LA Rodríguez-Cortés, FJ Hernández, M Rodríguez… - Matter, 2023 - cell.com
Summary Dual-state emission (DSE), the emission of organic molecules in solution and
solid state, has recently drawn interest for advanced performance materials. Here, we report …