High‐Performance Tandem Organic Solar Cells Using HSolar as the Interconnecting Layer
Abstract
Tandem structure provides a practical way to realize high efficiency organic photovoltaic cells, it can be used to extend the wavelength coverage for light harvesting. The interconnecting layer (ICL) between subcells plays a critical role in the reproducibility and performance of tandem solar cells, yet the processability of the ICL has been a challenge. In this work the fabrication of highly reproducible and efficient tandem solar cells by employing a commercially available material, PEDOT:PSS HTL Solar (HSolar), as the hole transporting material used for the ICL is reported. Comparing with the conventional PEDOT:PSS Al 4083 (c‐PEDOT), HSolar offers a better wettability on the underlying nonfullerene photoactive layers, resulting in better charge extraction properties of the ICL. When FTAZ:IT‐M and PTB7‐Th:IEICO‐4F are used as the subcells, a power conversion efficiency (PCE) of 14.7% is achieved in the tandem solar cell. To validate the processability of these tandem solar cells, three other research groups have successfully fabricated tandem devices using the same recipe and the highest PCE obtained is 16.1%. With further development of donor polymers and device optimization, the device simulation results show that a PCE > 22% can be realized in tandem cells in the near future.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 12, 2020
- Source ID
- 10.1002/aenm.202000823
Entities
People
- Abay Gadisa
- Aram Amassian
- Brendan T O'Connor
- Carr Hoi Yi Ho
- Franky So
- Harald Ade
- Jeromy J. Rech
- Qi Dong
- Ronald Booth
- Taesoo Kim
- Thomas D. Anthopoulos
- Wei You
- Xueping Yi
- Yuan Xiong
- Yuliar Firdaus
Organizations
- King Abdullah University of Science and Technology
- National Science Foundation
- North Carolina State University
- Office of Naval Research
- University of North Carolina at Chapel Hill