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Solution-processed, semitransparent organic photovoltaics integrated with solution-doped graphene electrodes
Jan-Kai Chang1, Yu-Yun Huang2, Ding-Lun Lin2
1Graduate Institute of Photonics and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei 106, Taiwan.
Scientific Reports
|November 18, 2020
Summary
Researchers developed solution-processed semitransparent organic photovoltaics (OPV) using doped graphene electrodes. These devices achieve 85.7% of control device efficiency while maintaining transparency.
Area of Science:
- Materials Science
- Energy Science
- Nanoscience
Background:
- Organic photovoltaics (OPVs) offer a promising avenue for renewable energy generation.
- Developing efficient and transparent electrodes is crucial for advancing OPV technology.
- Graphene's unique electronic properties make it a potential candidate for electrode applications.
Purpose of the Study:
- To demonstrate solution-processed semitransparent organic photovoltaics (OPVs) using graphene as top electrodes.
- To investigate the work function of doped graphene under various doping conditions.
- To evaluate the performance and transparency of the fabricated OPV devices.
Main Methods:
- A transfer method was employed for applying graphene as top electrodes.
- A solution doping process was used to modify graphene's work function.
- Photoemission spectroscopy was utilized to study the work function of doped graphene.
- PEDOT-doped graphene was used to fabricate transparent electrodes for OPVs.
Main Results:
- Solution-processed semitransparent OPVs were successfully fabricated.
- The work function of doped graphene was tuned via doping.
- The fabricated OPVs achieved a power conversion efficiency (PCE) of 4.2%.
- The devices maintained good transparency across visible wavelengths, reaching 85.7% of control device PCE.
Conclusions:
- Doped graphene can serve as an effective transparent electrode material for solution-processed OPVs.
- The use of PEDOT-doped graphene facilitates favorable band alignment for efficient carrier extraction.
- This approach offers a viable pathway for developing high-performance, transparent organic solar cells.
