Natures of optical absorption transitions and excitation energy dependent photostability of diketopyrrolopyrrole (DPP)-based photovoltaic copolymers

2015 ◽  
Vol 8 (11) ◽  
pp. 3222-3232 ◽  
Author(s):  
Sebastian Wood ◽  
Jessica Wade ◽  
Munazza Shahid ◽  
Elisa Collado-Fregoso ◽  
Donal D. C. Bradley ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Excitation Energy ◽  
Energy Dependent ◽  
Absorption Transitions

The photostability of diketopyrrolopyrrole (DPP)-based copolymers is examined by investigating the natures of the two dominant optical absorption transitions.

scholarly journals Ultrafast charge transfer dynamics in 2D Covalent Organic Frameworks/Re-complex hybrid photocatalyst for CO2 reduction: hot electrons vs. cold electrons

2021 ◽  
Author(s):  
Qinying Pan ◽  
Mohamed Abdellah ◽  
Yuehan Cao ◽  
Yang Liu ◽  
Weihua Lin ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Excitation Energy ◽  
Co2 Reduction ◽  
Underlying Mechanism ◽  
High Energy ◽  
Hot Electrons ◽  
Covalent Organic Frameworks ◽  
Energy Excitation ◽  
Energy Dependent

Abstract Rhenium(I)-carbonyl-diimine complexes are promising photocatalysts for CO2 reduction. Covalent organic frameworks (COFs) can be perfect sensitizers to enhance the reduction activities. Here we investigated the excited state dynamics of COF (TpBpy) with 2,2'-bipyridine incorporating Re(CO)5Cl (Re-TpBpy) to rationalize the underlying mechanism. The time-dependent DFT calculation first clarified excited state structure of the hybrid catalyst. The studies from transient visible and infrared spectroscopies revealed the excitation energy-dependent photo-induced charge transfer pathways in Re-TpBpy. Under low energy excitation, the electrons at the LUMO level are quickly injected from Bpy into ReI center (1–2 ps) followed by backward recombination (13 ps). Under high energy excitation, the hot-electrons are first injected into the higher unoccupied level of ReI center (1–2 ps) and then slowly relax back to the HOMO in COF (24 ps). There also remains long-lived free electrons in the COF moiety. This explained the excitation energy-dependent CO2 reduction performance in our system.

Ultrafast excited state dynamics of fucoxanthin: excitation energy dependent intramolecular charge transfer dynamics

2011 ◽  
Vol 13 (22) ◽  
pp. 10762 ◽  
Author(s):  
Daisuke Kosumi ◽  
Toshiyuki Kusumoto ◽  
Ritsuko Fujii ◽  
Mitsuru Sugisaki ◽  
Yoshiro Iinuma ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Excitation Energy ◽  
Intramolecular Charge Transfer ◽  
Excited State Dynamics ◽  
Charge Transfer Dynamics ◽  
Energy Dependent

Excitation Energy Dependent Charge Separation at Hole-Transporting Dye/TiO2 Hetero Interface

2012 ◽  
Vol 116 (40) ◽  
pp. 21148-21156 ◽  
Author(s):  
Eva L. Unger ◽  
Tomas Edvinsson ◽  
Joseph D. Roy-Mayhew ◽  
Håkan Rensmo ◽  
Anders Hagfeldt ◽  
...  
Keyword(s):  
Excitation Energy ◽  
Charge Separation ◽  
Hole Transporting ◽  
Energy Dependent

Excitation energy dependent switchable emission in SrZnO2 nanophosphors: XAS and luminescence studies

2020 ◽  
Vol 8 (9) ◽  
pp. 3147-3155 ◽  
Author(s):  
Manju ◽  
Megha Jain ◽  
Pargam Vashishtha ◽  
Sanjay Kumar ◽  
Parasmani Rajput ◽  
...  
Keyword(s):  
Excitation Energy ◽  
Dual Emission ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Energy Dependent

An unprecedented excitation energy dependent dual emission from SrZnO2 nanophosphors is observed, predicting its applicability for switchable light emitting devices.

scholarly journals Using excitation-energy dependent fission yields to identify key fissioning nuclei in r-process nucleosynthesis

2019 ◽  
Vol 46 (6) ◽  
pp. 065202 ◽  
Author(s):  
N Vassh ◽  
R Vogt ◽  
R Surman ◽  
J Randrup ◽  
T M Sprouse ◽  
...  
Keyword(s):  
Excitation Energy ◽  
R Process ◽  
Energy Dependent ◽  
Fission Yields

Parity equilibration in nuclear level densities of 159–166Dy

2020 ◽  
Vol 35 (38) ◽  
pp. 2050315
Author(s):  
R. Razavi ◽  
O. Nouri ◽  
A. Rahmatinejad ◽  
S. Mohammadi
Keyword(s):  
Excitation Energy ◽  
Energy Dependence ◽  
Pair Breaking ◽  
Microscopic Approach ◽  
Nuclear Level ◽  
Pairing Effect ◽  
Level Densities ◽  
Energy Dependent

Excitation-energy dependent parity ratios in the level densities of [Formula: see text] isotopes are calculated within a microscopic approach. Introducing a parity equilibration parameter, energy dependence of the transition from where a single parity dominates to a parity equilibrated state is compared among [Formula: see text] isotopes and its relation to the pairing effect is investigated. A correlation between the pair-breaking and the equilibration of parity distributions is observed for the considered isotopes.

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