Impurity Effects on Excited-State Dynamics of Conjugated Polymers

2019 ◽  
Vol 123 (35) ◽  
pp. 21336-21344 ◽  
Author(s):  
Zhen Sun ◽  
Sheng Li ◽  
Shijie Xie ◽  
Zhong An
Keyword(s):  
Excited State ◽  
Conjugated Polymers ◽  
Impurity Effects ◽  
Excited State Dynamics

Excited state dynamics in π-conjugated polymers

2011 ◽  
pp. 30-64
Author(s):  
João Pina ◽  
Hugh D. Burrows ◽  
J. Sérgio Seixas de Melo
Keyword(s):  
Excited State ◽  
Conjugated Polymers ◽  
Excited State Dynamics

scholarly journals Donor–acceptor photoexcitation dynamics in organic blends investigated with a high sensitivity pump–probe system

2018 ◽  
Vol 6 (40) ◽  
pp. 10822-10828 ◽  
Author(s):  
Simon Kahmann ◽  
Widianta Gomulya ◽  
Maria A. Loi ◽  
Andrea Mura
Keyword(s):  
Excited State ◽  
Conjugated Polymers ◽  
High Sensitivity ◽  
Pump Probe ◽  
Excited State Dynamics ◽  
System P ◽  
Photovoltaic Applications ◽  
Probe System ◽  
Donor Acceptor

The excited state dynamics of conjugated polymers are studied at photon fluences relevant for photovoltaic applications.

Excited-State Dynamics in the RNA Nucleotide Uridine 5’-Monophosphate Investigated by Femtosecond Broadband Transient Absorption Spectroscopy

2019 ◽  
Author(s):  
Matthew M. Brister ◽  
Carlos Crespo-Hernández
Keyword(s):  
Excited State ◽  
Excited States ◽  
Ground State ◽  
Transient Absorption ◽  
Electronic Energy ◽  
Transient Absorption Spectroscopy ◽  
Electronic Relaxation ◽  
Vibrationally Excited ◽  
Excited State Dynamics ◽  
Π State

<p></p><p> Damage to RNA from ultraviolet radiation induce chemical modifications to the nucleobases. Unraveling the excited states involved in these reactions is essential, but investigations aimed at understanding the electronic-energy relaxation pathways of the RNA nucleotide uridine 5’-monophosphate (UMP) have not received enough attention. In this Letter, the excited-state dynamics of UMP is investigated in aqueous solution. Excitation at 267 nm results in a trifurcation event that leads to the simultaneous population of the vibrationally-excited ground state, a longlived <sup>1</sup>n<sub>O</sub>π* state, and a receiver triplet state within 200 fs. The receiver state internally convert to the long-lived <sup>3</sup>ππ* state in an ultrafast time scale. The results elucidate the electronic relaxation pathways and clarify earlier transient absorption experiments performed for uracil derivatives in solution. This mechanistic information is important because long-lived nπ* and ππ* excited states of both singlet and triplet multiplicities are thought to lead to the formation of harmful photoproducts.</p><p></p>

Modulation of Excited State Dynamics in Lead Halide Perovskite Films with Electrical Bias

2019 ◽  
Author(s):  
Gergely Samu ◽  
R.A. Scheidt ◽  
A. Balog ◽  
C. Janáky ◽  
P.V. Kamat
Keyword(s):  
Excited State ◽  
Excited State Dynamics ◽  
Halide Perovskite ◽  
Electrical Bias ◽  
Lead Halide
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