External Electric Field-Dependent Photoinduced Charge Transfer in a Donor–Acceptor System in Two-Photon Absorption

2020 ◽  
Vol 124 (4) ◽  
pp. 2319-2332 ◽  
Author(s):  
Xijiao Mu ◽  
Huan Zong ◽  
Lilong Zhu ◽  
Mengtao Sun
Keyword(s):  
Charge Transfer ◽  
Electric Field ◽  
External Electric Field ◽  
Photon Absorption ◽  
Photoinduced Charge Transfer ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Field Dependent ◽  
Donor Acceptor ◽  
Photoinduced Charge

scholarly journals Photoinduced charge transfer in quasi-one-dimensional polymers in two-photon absorption

RSC Advances ◽  
2020 ◽  
Vol 10 (55) ◽  
pp. 33288-33298 ◽  
Author(s):  
Pen-ji Yan ◽  
Xijiao Mu ◽  
Jun Dong ◽  
Mengtao Sun
Keyword(s):  
Charge Transfer ◽  
Photon Absorption ◽  
Photoinduced Charge Transfer ◽  
One Dimensional ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Photoinduced Charge

In this work, we theoretically investigate the structure and the transition characteristics of one- (OPA) and two-photon absorption (TPA) spectra of different length neutral and charged thiophene polymers

scholarly journals Physical Mechanism of Photoinduced Charge Transfer in One- and Two-Photon Absorption in D-D-π-A Systems

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3925
Author(s):  
Xinyue Wang ◽  
Di Wang ◽  
Jia Li ◽  
Meixia Zhang ◽  
Peng Song
Keyword(s):  
Charge Transfer ◽  
Cross Section ◽  
Physical Mechanism ◽  
Photon Absorption ◽  
Large Cross Section ◽  
Photoinduced Charge Transfer ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Charge Transfer Excitation ◽  
Photoinduced Charge

The photoinduced charge transfer process of a D-π-A molecule (W1) and three D-D-π-A molecules (WS5–WS7) with triphenylamine as a donor was studied theoretically. D-D-π-A molecules are formed by inserting donors between the triphenylamine and π-linker (π-bridge) on the base of the W1 molecule. The results showed that donor insertion resulted in a red shift in the absorption spectrum, and the absorption intensity increased to a certain extent. A visualization method was used to observe the charge transfer of the four molecules in the process of one- and two-photon absorption (TPA). The local excitation enhanced charge transfer excitation in the TPA process was analyzed and discussed, and the insertion of the thiazolo[5,4-d]thiazole donor showed the largest TPA cross-section. This work contributed to the profound understanding of D-D-π-A molecules and the design of large cross-section TPA molecules.

Photoinduced charge transfer by one and two-photon absorptions: physical mechanisms and applications

2018 ◽  
Vol 20 (30) ◽  
pp. 19720-19743 ◽  
Author(s):  
Huan Zong ◽  
Xinxin Wang ◽  
Jun Quan ◽  
Chunhua Tian ◽  
Mengtao Sun
Keyword(s):  
Charge Transfer ◽  
Organic Solar Cells ◽  
Transition Density ◽  
Photon Absorption ◽  
Neutral System ◽  
Photoinduced Charge Transfer ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Charge Difference Density ◽  
Photoinduced Charge

We review photoinduced charge transfer in organic solar cells without and with an external electric field and then we introduce the visualization methods of the transition density, charge difference density and transition density matrix for the analysis of the photoinduced charge transfer in a neutral system and a charged system excited by one-photon and two-photon absorption.

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