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Industrial Kraft Lignin Based Binary Cathode Interface Layer Enables Enhanced Stability in High Efficiency Organic
Qilun Zhang1,2, Tiefeng Liu1, Sebastian Wilken3
1Laboratory of Organic Electronics, Department of Science and Technology (ITN), Linköping University, Norrköping, SE-60174, Sweden.
Advanced Materials (Deerfield Beach, Fla.)
|October 9, 2023
Summary
This study introduces a novel binary cathode interface layer (CIL) using wood-derived kraft lignin (KL) for organic solar cells (OSCs). The lignin-based CIL enhances device efficiency and stability, offering a sustainable alternative for OSC fabrication.
Area of Science:
- Materials Science
- Renewable Energy
- Organic Electronics
Background:
- Organic solar cells (OSCs) are a promising renewable energy technology.
- Developing efficient and stable cathode interface layers (CILs) is crucial for OSC performance.
- Sustainable and cost-effective materials are needed to advance OSC fabrication.
Purpose of the Study:
- To develop a novel binary CIL strategy for OSCs using kraft lignin (KL).
- To investigate the impact of KL-based CILs on OSC efficiency and work function.
- To evaluate the stability enhancement of OSCs incorporating KL.
Main Methods:
- Fabrication of binary CILs by combining KL with bathocuproine (BCP) or PFN-Br.
- Characterization of CIL properties, including work function tuning.
- Performance testing of OSCs with binary CILs in terms of efficiency and stability.
Main Results:
- Binary CILs with tunable work function were successfully fabricated using KL.
- OSCs with KL-based binary CILs demonstrated comparable or superior efficiency to traditional CILs.
- Significant enhancement in OSC stability was observed, attributed to KL's barrier properties.
Conclusions:
- Kraft lignin is a viable and sustainable component for high-performance OSC CILs.
- The binary CIL strategy offers a pathway to improve both efficiency and operational stability of OSCs.
- This approach promotes the use of bio-based materials in organic electronics.
