Charge-transfer electronic states in organic solar cells: a TDDFT study

2021 ◽  
Author(s):  
Andres F. Marmolejo-Valencia ◽  
Zaahel Mata-Pinzón ◽  
Carlos Amador-Bedolla
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Organic Solar Cells ◽  
Charge Separation ◽  
Organic Photovoltaic ◽  
Precise Description ◽  
Transfer Processes ◽  
Photovoltaic Materials ◽  
Organic Photovoltaic Materials ◽  
Electron Transfer Processes

Prediction of new organic photovoltaic materials in solar cells must include a precise description of charge-transfer states that are involved in electron-transfer processes such as charge separation and charge recombination which govern efficiency.

Influence of Altering Chlorine Substitution Positions on Photovoltaic Property of Small Molecule Donors for All-Small-Molecule Organic Solar Cells

2022 ◽  
Author(s):  
Keli Shi ◽  
Beibei Qiu ◽  
Can Zhu ◽  
Xinxin Xia ◽  
Xiaonan Xue ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Photovoltaic Property ◽  
Organic Photovoltaic ◽  
Structure Property ◽  
Photovoltaic Materials ◽  
Chlorine Substitution ◽  
Structure Property Relationship ◽  
Organic Photovoltaic Materials

To deeply investigate the structure-property relationship in organic solar cells (OSCs), one widely used strategy is to design a series of organic photovoltaic materials with same chemical formular but different...

Dithieno[3,2-b:2′,3′-d]pyrrole-based hole transport materials for perovskite solar cells with efficiencies over 18%

2018 ◽  
Vol 6 (17) ◽  
pp. 7950-7958 ◽  
Author(s):  
Sally Mabrouk ◽  
Mengmeng Zhang ◽  
Zhihui Wang ◽  
Mao Liang ◽  
Behzad Bahrami ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Organic Photovoltaic ◽  
Photovoltaic Materials ◽  
Organic Photovoltaic Materials

Dithieno[3,2-b:2′,3′-d]pyrrole (DTP) derivatives are one of the most important organic photovoltaic materials due to better π-conjugation across fused thiophene rings.

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.

scholarly journals Efficient Charge Separation of Cold Charge-Transfer States in Organic Solar Cells Through Incoherent Hopping

2017 ◽  
Vol 8 (9) ◽  
pp. 2093-2098 ◽  
Author(s):  
Stavros Athanasopoulos ◽  
Steffen Tscheuschner ◽  
Heinz Bässler ◽  
Anna Köhler
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Organic Solar Cells ◽  
Charge Separation ◽  
Cold Charge ◽  
Efficient Charge

Importance of side-chain anchoring atoms on electron donor/fullerene interfaces for high-performance organic solar cells

2017 ◽  
Vol 5 (19) ◽  
pp. 9316-9321 ◽  
Author(s):  
Guangchao Han ◽  
Yuan Guo ◽  
Ruihong Duan ◽  
Xingxing Shen ◽  
Yuanping Yi
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Electron Donor ◽  
Organic Solar Cells ◽  
High Performance ◽  
Side Chain ◽  
Transfer Processes ◽  
First Time

For the first time, side-chain anchoring atoms are found to play an important role in tuning the donor/fullerene interfacial arrangements and charge-transfer processes for organic solar cells.

Organic Photovoltaic Electron Acceptors Behaving Aggregation-Induced Emission for Reduced Nonradiative Recombination

2021 ◽  
Author(s):  
Yawen Li ◽  
Yihang Zhang ◽  
Xia Zuo ◽  
Yuze Lin
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Electron Acceptors ◽  
Organic Photovoltaic ◽  
Nonradiative Recombination ◽  
Aggregation Induced Emission ◽  
Photovoltaic Materials ◽  
Fused Ring

We introduce a facile method to attach aggregation-induced emission (AIE) properties to fused ring electron acceptors by tetraphenylethylene decoration. Organic solar cells (OSCs) based on the AIE photovoltaic materials showed...

The design of dithieno[3,2-b:2′,3′-d]pyrrole organic photovoltaic materials for high-efficiency organic/perovskite solar cells

2020 ◽  
Vol 8 (43) ◽  
pp. 22572-22592
Author(s):  
Jinru Cao ◽  
Fuqiang Du ◽  
Linqiang Yang ◽  
Weihua Tang
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Material Design ◽  
Organic Photovoltaic ◽  
High Power Conversion Efficiency ◽  
Photovoltaic Materials ◽  
Organic Photovoltaic Materials

The design of dithieno[3,2-b:2′,3′-d]pyrrole (DTP) based FREAs and dopant-free HTMs for record high power conversion efficiency and stable solar cells is updated to give insightful view on material design and device strategies to boast photovoltaic performance.

Sign in / Sign up

Export Citation Format

Share Document