Results 71 to 80 of about 7,202 (210)

TADF‐Emitting Dendrimers for Scalable Bar‐Coating Fabrication of Light‐Emitting Electrochemical Cells

Advanced Materials Technologies, EarlyView.
TADF‐emitting dendrimers promise to enable scalable solution‐based fabrication of efficient electroluminescent devices by the virtue of an attractive set of properties. Here, we report on how light‐emitting electrochemical cells, comprising the TADF‐dendrimer tBuCz2m2pTRZ, can be fabricated by scalable bar‐coating under ambient air and deliver uniform ...
Shi Tang, Dianming Sun, Christian Larsen, Erik Zäll, Eli Zysman‐Colman, Ludvig Edman   +5 more
wiley   +1 more source

Hyperfluorescence circularly polarized OLEDs consisting of chiral TADF sensitizers and achiral multi-resonance emitters

Nature Communications
Developing circularly polarized organic light-emitting diodes (CP-OLEDs) that simultaneously achieve narrow-spectrum emission and high electroluminescence (EL) efficiency remains a formidable challenge.
Letian Chen, Peng Zou, Jinke Chen, Letian Xu, Ben Zhong Tang, Zujin Zhao   +5 more
doaj   +1 more source

The contributions of molecular vibrations and higher triplet levels to the intersystem crossing mechanism in metal-free organic emitters. [PDF]

, 2017
Intense, simultaneous, room temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF) is observed in a series of donor-acceptor-donor (D–A–D) molecules.
Huang, Rongjuan, Avó, João, Northey, Thomas, Chaning-Pearce, E., dos Santos, Paloma L., Ward, Jonathan S., Data, Przemyslaw, Etherington, Marc K., Fox, Mark A., Penfold, Thomas J., Berberan-Santos, Mário N., Lima, João C., Bryce, Martin R., Dias, Fernando B.   +13 more
core   +3 more sources

Excitonic Coupling of a TADF Assistant Dopant and a Multi‐Resonance TADF Emitter

Advanced Optical Materials
AbstractThe excitation energy transfer (EET) between two conformers of the deep‐blue thermally activated delayed fluorescence emitter DBA‐BTICz and the multi‐resonance fluorescence emitter ν‐DABNA is studied by means of quantum chemistry according to Fermi's Golden Rule.
Simon Metz, Christel M. Marian
openaire   +1 more source

Highly Efficient Pure‐Blue Single‐Layer Organic Light‐Emitting Diodes Without High‐Triplet‐Energy Auxiliary Materials

Advanced Optical Materials, EarlyView.
Blue organic light‐emitting diodes (OLEDs) comprising triplet‐harvesting emitters require the use of high‐triplet‐energy hosts and blocking layers to confine the triplet excitons to the emitter. Here, we present efficient single‐layer blue hyperfluorescent OLEDs comprising solely of a matrix‐free emissive layer between two charge‐injecting electrodes ...
Xiao Tan, Manish Kumar, Oskar Sachnik, Rishabh Saxena, Paul W. M. Blom, Gert‐Jan A. H. Wetzelaer   +5 more
wiley   +1 more source

Organic thermally activated delayed fluorescence material with strained benzoguanidine donor

Beilstein Journal of Organic Chemistry, 2023
Organic thermally activated delayed fluorescence (TADF) materials have been widely investigated due to their impressive electronic properties and applied potential for the third generation of organic light-emitting diodes (OLED).
Alexander C. Brannan, Elvie F. P. Beaumont, Nguyen Le Phuoc, George F. S. Whitehead, Mikko Linnolahti, Alexander S. Romanov   +5 more
doaj   +1 more source

Photophysics of an Asymmetric Donor–Acceptor–Donor′ TADF Molecule and Reinterpretation of Aggregation-Induced TADF Emission in These Materials [PDF]

The Journal of Physical Chemistry C, 2017
We report an in-depth photophysical investigation of an asymmetric donor–acceptor–donor′ (D–A–D′) thermally activated delayed fluorescence (TADF) molecule (4-(9H-carbazol-9-yl)phenyl)(4-(10H-phenothiazin-10-yl)phenyl)sulfone and compare its photophysical properties to the parent symmetric D–A–D and D′–A–D′ molecules.
Murat Aydemir, Shidang Xu, Chengjian Chen, Martin R. Bryce, Zhenguo Chi, Andrew P. Monkman   +5 more
openaire   +3 more sources

Visible‐Light Photoprogrammable Transistors Enabled by an All‐Organic Triplet‐Sensitized Diarylethene Channel Layer

Advanced Optical Materials, EarlyView.
All‐organic channel‐layer OFETs are shown to enable visible‐light photoprogramming via triplet‐sensitized diarylethene switching. Preferential localization of the photoswitch and organic sensitizer in intercrystalline amorphous domains preserves polymer crystalline packing while ensuring short‐range Dexter‐type triplet–triplet energy transfer and solid‐
Jieun Kwon, Syed Zahid Hassan, Gayoung Ham, Seonghyeon Kang, Geoneop Choi, Sanghyeok An, Hye Ryun Sim, Suryeon Jang, Chang Yun Son, Hyojung Cha, Dae Sung Chung   +10 more
wiley   +1 more source

Donor-only substituted benzene achieves thermally activated delayed fluorescence

Communications Chemistry
Thermally activated delayed fluorescence (TADF) is a promising mechanism for harvesting triplet excitons in organic light-emitting diodes (OLEDs). The donor–acceptor (D–A) design is the most conventional strategy for developing efficient TADF emitters. A
Masashi Mamada, Sawako Yada, Masahiro Hayakawa, Ryota Uchida, Hiroshi Katagiri, Takuji Hatakeyama, Chihaya Adachi   +6 more
doaj   +1 more source

Donor–Acceptor Fluorophores for Energy-Transfer-Mediated Photocatalysis [PDF]

, 2018
Triplet–triplet energy transfer (EnT) is a fundamental activation pathway in photocatalysis. In this work, we report the mechanistic origins of the triplet excited state of carbazole-cyanobenzene donor–acceptor (D–A) fluorophores in EnT-based ...
Huang, Jier, Li, Shuzhou, Liu, Qiuhua, Lu, Jingzhi, Pattengale, Brian, Shi, Wenxiong, Yang, Sizhuo, Zhang, Jian   +7 more
core   +3 more sources