中文版 | English
Title

Correlating Charge Transfer Dynamics with Interfacial Trap States in High-Efficiency Organic Solar Cells

Author
Corresponding AuthorLiu, Jian-Qiang; Yin, Hang; Hao, Xiao-Tao
Publication Years
2023-02-01
DOI
Source Title
ISSN
1944-8244
EISSN
1944-8252
Abstract
The charge transfer between the donor and acceptor determines the photogenerated carrier density in organic solar cells. However, a fundamental understanding regarding the charge transfer at donor/acceptor interfaces with high-density traps has not been fully addressed. Herein, a general correlation between trap densities and charge transfer dynamics is established by adopting a series of high-efficiency organic photovoltaic blends. It is found that the electron transfer rates are reduced with increased trap densities, while the hole transfer rates are independent of trap states. The local charges captured by traps can induce potential barrier formation around recombination centers, leading to the suppression of electron transfer. For the hole transfer process, the thermal energy provides a sufficient driving force, which ensures an efficient transfer rate. As a result, a 17.18% efficiency is obtained for PM6:BTP-eC9-based devices with the lowest interfacial trap densities. This work highlights the importance of interfacial traps in charge transfer processes and proposes an underlying insight into the charge transfer mechanism at nonideal interfaces in organic heterostructures.
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
Others
Funding Project
Major Program of Natural Science Foundation of Shandong Province[ZR2019ZD43] ; Natural Science Foundation of China[52073162] ; ARC Centre of Excellence in Exciton Science[CE170100026] ; National Key R&D program for International Collaboration[2021YFE0191500] ; Shenzhen Science and Technology Innovation Committee[JCYJ 20190809150213448]
WOS Research Area
Science & Technology - Other Topics ; Materials Science
WOS Subject
Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Accession No
WOS:000936880500001
Publisher
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/513409
DepartmentAcademy for Advanced Interdisciplinary Studies
Affiliation
1.Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
2.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Guangdong Provi, Peoples R China
3.RIKEN Ctr Emergent Matter Sci CEMS, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
4.Univ Melbourne, ARC Ctr Excellence Exciton Sci, Sch Chem, Parkville, Vic 3010, Australia
Recommended Citation
GB/T 7714
Wang, Tong,Chen, Zhi-Hao,Qiao, Jia-Wei,et al. Correlating Charge Transfer Dynamics with Interfacial Trap States in High-Efficiency Organic Solar Cells[J]. ACS Applied Materials & Interfaces,2023.
APA
Wang, Tong.,Chen, Zhi-Hao.,Qiao, Jia-Wei.,Qin, Wei.,Liu, Jian-Qiang.,...&Hao, Xiao-Tao.(2023).Correlating Charge Transfer Dynamics with Interfacial Trap States in High-Efficiency Organic Solar Cells.ACS Applied Materials & Interfaces.
MLA
Wang, Tong,et al."Correlating Charge Transfer Dynamics with Interfacial Trap States in High-Efficiency Organic Solar Cells".ACS Applied Materials & Interfaces (2023).
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