scholarly journals Polarization Energies at Organic–Organic Interfaces: Impact on the Charge Separation Barrier at Donor–Acceptor Interfaces in Organic Solar Cells

2016 ◽  
Vol 8 (24) ◽  
pp. 15524-15534 ◽  
Author(s):  
Sean M. Ryno ◽  
Yao-Tsung Fu ◽  
Chad Risko ◽  
Jean-Luc Brédas
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Charge Separation ◽  
Organic Interfaces ◽  
Donor Acceptor

scholarly journals Long-lived and disorder-free charge transfer states enable endothermic charge separation in efficient non-fullerene organic solar cells

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Ture F. Hinrichsen ◽  
Christopher C. S. Chan ◽  
Chao Ma ◽  
David Paleček ◽  
Alexander Gillett ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Organic Solar Cells ◽  
Charge Separation ◽  
Free Charge ◽  
Charge Generation ◽  
Time Resolved ◽  
Thermodynamic Conditions ◽  
Donor Acceptor ◽  
Interfacial Charge

Abstract Organic solar cells based on non-fullerene acceptors can show high charge generation yields despite near-zero donor–acceptor energy offsets to drive charge separation and overcome the mutual Coulomb attraction between electron and hole. Here, we use time-resolved optical spectroscopy to show that free charges in these systems are generated by thermally activated dissociation of interfacial charge-transfer states that occurs over hundreds of picoseconds at room temperature, three orders of magnitude slower than comparable fullerene-based systems. Upon free electron–hole encounters at later times, both charge-transfer states and emissive excitons are regenerated, thus setting up an equilibrium between excitons, charge-transfer states and free charges. Our results suggest that the formation of long-lived and disorder-free charge-transfer states in these systems enables them to operate closely to quasi-thermodynamic conditions with no requirement for energy offsets to drive interfacial charge separation and achieve suppressed non-radiative recombination.

Controlling charge separation and recombination by chemical design in donor–acceptor dyads

2016 ◽  
Vol 18 (27) ◽  
pp. 18536-18548 ◽  
Author(s):  
Li Liu ◽  
Pierre Eisenbrandt ◽  
Thomas Roland ◽  
Matthias Polkehn ◽  
Pierre-Olivier Schwartz ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Charge Separation ◽  
Chemical Design ◽  
Potential Applications ◽  
Donor Acceptor

Conjugated donor–acceptor block co-oligomers that self-organize into D–A mesomorphic arrays have raised increasing interest due to their potential applications in organic solar cells.

Effects of end-on oriented polymer chains at the donor/acceptor interface in organic solar cells

2018 ◽  
Vol 6 (45) ◽  
pp. 22889-22898 ◽  
Author(s):  
Fanji Wang ◽  
Kyohei Nakano ◽  
Hiroyuki Yoshida ◽  
Kazuhito Hashimoto ◽  
Hiroshi Segawa ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Charge Separation ◽  
Polymer Chains ◽  
Oriented Polymer ◽  
Coulombic Interaction ◽  
Donor And Acceptor ◽  
Donor Acceptor

Intrachain hole delocalization vertical to donor and acceptor interface weakens coulombic interaction of the charge pairs and facilitate the charge separation in organic solar cells.

On the Physical Origins of Charge Separation at Donor–Acceptor Interfaces in Organic Solar Cells: Energy Bending versus Energy Disorder

2020 ◽  
Vol 3 (4) ◽  
pp. 1900230 ◽  
Author(s):  
Leonardo Evaristo Sousa ◽  
Veaceslav Coropceanu ◽  
Demétrio Antônio da Silva Filho ◽  
Gjergji Sini
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Charge Separation ◽  
Energy Disorder ◽  
Donor Acceptor

Triphenylamine based donor-acceptor-donor type small molecules for organic solar cells

2021 ◽  
Vol 1198 ◽  
pp. 113176
Author(s):  
Sadaf Bibi ◽  
Rasheed Ahmad Khera ◽  
Afifa Farhat ◽  
Javed Iqbal
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Organic Solar Cells ◽  
Donor Type ◽  
Donor Acceptor
Sign in / Sign up

Export Citation Format

Share Document