The Role of Thermally Activated Charge Separation in Organic Solar Cells
Abstract In recent years, organic solar cells (OSCs) have shown high power efficiencies approaching 20%. However, the fundamental mechanisms of charge separation in these highly efficient devices have been a subject of intensive debates. Here, the charge separation efficiency (CSE) is extensively investigated across a wide range of blend systems with different energetic offsets. The findings unveil the temperature‐dependent nature of charge separation in low‐offset systems, emphasizing its significant contribution to the overall CSE. An intriguing inverse correlation between CSE and charge separation activation energy in relation to the offset is also observed. These results shed new light on the factors underlying the high CSE observed in the state‐of‐the‐art devices.
Authors
- Rokas Jasiūnas (ORCID: https://orcid.org/0000-0002-0259-408X)
- Huotian Zhang (ORCID: https://orcid.org/0000-0002-9302-4129)
- Xian’e Li (ORCID: https://orcid.org/0000-0002-9174-7593)
- Jiehao Fu (ORCID: https://orcid.org/0000-0001-7244-4346)
- Vidmantas Gulbinas (ORCID: https://orcid.org/0000-0002-9528-0230)
- Mats Fahlman (ORCID: https://orcid.org/0000-0001-9879-3915)
- Nakul Jain (ORCID: https://orcid.org/0000-0001-6965-190X)
- Rui Zhang (ORCID: https://orcid.org/0000-0002-1008-5832)
- Gang Li (ORCID: https://orcid.org/0000-0002-1137-7642)
- Feng wei Gao (ORCID: https://orcid.org/0000-0002-2582-1740)
Institutions
- Linköping University (SE)
- Hong Kong Polytechnic University (HK)
- Center for Physical Sciences and Technology (LT)
Publication Details
- Journal
- Advanced Energy Materials
- Published
- 2024-10-28
- DOI
- https://doi.org/10.1002/aenm.202403675
- Citations
- 5
- Primary Topic
- Organic Electronics and Photovoltaics
- Type
- article
- Field-Weighted Citation Impact
- 1.04
Funders
- Central South University
- Linköpings Universitet
- Energimyndigheten
- Beijing Synchrotron Radiation Facility