Interchain Charge-Transfer States Mediate Triplet Formation in Purified Conjugated Polymer Aggregates

2016 ◽  
Vol 120 (40) ◽  
pp. 23230-23238 ◽  
Author(s):  
Alan K. Thomas ◽  
Hunter A. Brown ◽  
Benjamin D. Datko ◽  
Jose A. Garcia-Galvez ◽  
John K. Grey
Keyword(s):  
Charge Transfer ◽  
Conjugated Polymer ◽  
Polymer Aggregates ◽  
Triplet Formation

A CORRESPONDING RELATION BETWEEN ELECTROLUMINESCENT INTENSITY AND THE ENERGY AND CHARGE TRANSFER IN DOPED ORGANIC ELECTROLUMINESCENT DEVICES

2008 ◽  
Vol 22 (30) ◽  
pp. 2979-2986
Author(s):  
HONG-JIAN LI ◽  
ZHI-JUN WANG ◽  
JUN-XI WANG ◽  
XUE-YONG LI ◽  
HUI XIA ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Conjugated Polymer ◽  
Fluorescence Spectra ◽  
Dopant Concentration ◽  
Quantitative Relation ◽  
Efficient Energy Transfer ◽  
Electroluminescent Devices ◽  
Efficient Energy ◽  
Hamiltonian Model ◽  
Organic Electroluminescent

In doped organic electroluminescent devices (OLEDs), the changes of the fluorescence spectra occurred due to the energy and charge transfer from guest to host. A quantitative relation between the energy and charge transfer for doping OLEDs was studied by means of a Hamiltonian model. It was found that there is a corresponding relation between the EL intensity of doped PVK and the amount of the transferred charge and the change of the energy derived from charge transfer with dopant concentration, and the more the amount of the transferred charge and the decreasing of the energy from charge transfer, the higher the EL intensity in doped OLEDs. We can deduce that the efficient energy transfer results from the transferred charge between PVK and perylene. Based on the transport mechanism of carriers in conjugated polymer, an expression of conductivity was presented. Calculated results indicated that there is also a corresponding relation between the EL intensity of doped PVK and conductivities with dopant concentration. The larger the conductivities, the higher the EL intensity in doped OLEDs.

scholarly journals Conjugated Polymer Donor-Molecular Acceptor Nanohybrids for Photocatalytic Hydrogen Evolution

2019 ◽  
Author(s):  
Haofan Yang ◽  
Xiaobo Li ◽  
Reiner Sebastian Sprick ◽  
Andrew I. Cooper
Keyword(s):  
Photocatalytic Activity ◽  
Charge Transfer ◽  
Conjugated Polymers ◽  
Hydrogen Evolution ◽  
Conjugated Polymer ◽  
Apparent Quantum Yield ◽  
High Hydrogen ◽  
Photocatalytic Hydrogen Evolution ◽  
Efficient Charge ◽  
Donor Acceptor

A library of 237 organic binary/ternary nanohybrids consisting of conjugated polymers donors and both fullerene and non-fullerene molecular acceptors was prepared and screened for sacrificial photocatalytic hydrogen evolution. These donor-acceptor nanohybrids (DANHs) showed significantly enhanced hydrogen evolution rates compared with the parent donor or acceptor compounds. DANHs of <a></a><a>a polycarbazole</a>-based donor combined with a methanofullerene acceptor (PCDTBT/PC<sub>60</sub>BM) showed a high hydrogen evolution rate of 105.2 mmol g<sup>-1</sup> h<sup>-1</sup> under visible light (λ > 420 nm). This DANH photocatalyst produced 5.9 times more hydrogen than a sulfone-containing polymer (P10) under the same conditions, which is one of the most efficient organic photocatalysts reported so far. An apparent quantum yield of hydrogen evolution of 3.0 % at 595 nm was measured for this DANH. The photocatalytic activity of the DANHs, which in optimized cases reached 179.0 mmol g<sup>-1</sup> h<sup>-1</sup>, is attributed to efficient charge transfer at the polymer donor/molecular acceptor interface. We also show that ternary donor<sub>A</sub>-donor<sub>B</sub>-acceptor nanohybrids can give higher activities than binary donor-acceptor hybrids in some cases.

scholarly journals Conjugated Polymer Nanoparticle-Graphene Oxide Charge-Transfer Complexes

2018 ◽  
Vol 28 (23) ◽  
pp. 1707548 ◽  
Author(s):  
Emin Istif ◽  
Javier Hernández-Ferrer ◽  
Esteban P. Urriolabeitia ◽  
Anastasios Stergiou ◽  
Nikos Tagmatarchis ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Charge Transfer ◽  
Conjugated Polymer ◽  
Charge Transfer Complexes ◽  
Oxide Charge ◽  
Polymer Nanoparticle

Charge Transfer Complexes of a Conjugated Polymer

2004 ◽  
Vol 398 (4-6) ◽  
pp. 204-206 ◽  
Author(s):  
A. A. Bakulin ◽  
A. N. Khodarev ◽  
D. S. Martyanov ◽  
S. G. Elizarov ◽  
I. V. Golovnin ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Conjugated Polymer ◽  
Charge Transfer Complexes

Fluorescence from Conjugated Polymer Aggregates in Dilute Poor Solution

1999 ◽  
Vol 103 (14) ◽  
pp. 2375-2380 ◽  
Author(s):  
Jui-Hung Hsu ◽  
Wunshain Fann ◽  
Pei-Hsi Tsao ◽  
Kuen-Ru Chuang ◽  
Shaw-An Chen
Keyword(s):  
Conjugated Polymer ◽  
Polymer Aggregates

scholarly journals In Situ Optical Imaging of the Growth of Conjugated Polymer Aggregates

2018 ◽  
Vol 130 (7) ◽  
pp. 1844-1848 ◽  
Author(s):  
Jaesung Yang ◽  
Heungman Park ◽  
Laura J. Kaufman
Keyword(s):  
Optical Imaging ◽  
Conjugated Polymer ◽  
Polymer Aggregates
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