Frontier molecular orbital analysis for determining the equilibrium geometries of atmospheric prenucleation complexes

2019 ◽  
Vol 120 (3) ◽  
Author(s):  
Paolo Sebastianelli ◽  
Rodolfo G. Pereyra
Keyword(s):  
Molecular Orbital ◽  
Frontier Molecular Orbital ◽  
Molecular Orbital Analysis ◽  
Equilibrium Geometries ◽  
Orbital Analysis

scholarly journals DFT Based Modeling of Asymmetric Non-Fullerene Acceptors for High-Performance Organic Solar Cell

2022 ◽  
Author(s):  
Noureen Kanwal ◽  
Riaz Hussain ◽  
Abdul Satar ◽  
Mohammed A. Assiri ◽  
Muhammad Imran ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Molecular Orbital ◽  
Organic Solar Cell ◽  
High Performance ◽  
Polymer Solar Cells ◽  
Reorganization Energy ◽  
Frontier Molecular Orbital ◽  
Transport Analysis ◽  
Molecular Orbital Analysis ◽  
Orbital Analysis

Abstract AbstractFive new asymmetric NFA-based polymer solar cells i.e., N1-N5 are designed by doing modification in terminal groups of the acceptor part of experimentally synthesized reference molecule with (4,4,9,9-tetramethyl-4,9 dihydroselenopheno [2’,3’:5,6]-s-indaceno [1,2-b] thiophene) core. Frontier molecular orbital analysis is used to study their photovoltaic and optoelectronic properties. It confirmed the electrons' transportation from the donor to the acceptor part. It stated that all molecules have a lower bandgap than R and N2 has the lowest bandgap of 2.01 eV. The molecular orbital potential analysis confirmed the electron-withdrawing properties of the terminal groups. Optical properties studies evaluated maximum absorption with transition energies. All newly designed molecules N1-N5 show higher λmax values than R i.e., in the range of 680-740 nm with N2 having the highest λmax of 735 nm and lowest transition energy of 1.69 eV. Dipole moment studies showed that N3 has a maximum dipole moment of 7-40 D with all others having comparable values. TDM plots confirmed the electron shifting from donor to acceptor region. Reorganization energy analysis showed that N1 and N3 have the lowest reorganization energy values thus giving the highest electron mobilities. Voc calculated results of all molecules N1-N5 have lower values than R when coupled with PTB7-Th donor polymer. Charge transport analysis of N2 and PTB7-Th coupled molecule confirmed the acceptor type nature of our designed molecules.

Sign in / Sign up

Export Citation Format

Share Document