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Tailoring Functional Terminals on Solution-Processable Fullerene Electron Transporting Materials for High Performance
1State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China.
Nanomaterials (Basel, Switzerland)
|April 12, 2022
Summary
Functionalized fullerene electron transporting materials (ETMs) enhance perovskite solar cell (PSC) performance and stability. A novel CECB fullerene derivative achieved over 19% power conversion efficiency and excellent photo-stability.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Fullerene C60 is a key electron transporting material (ETM) for perovskite solar cells (PSCs).
- The interface between perovskite and C60 limits device performance and stability due to weak interactions.
- Functionalization of ETMs is crucial for improving PSC efficiency and longevity.
Purpose of the Study:
- To design and synthesize novel fulleropyrrolidine ETMs with improved interfacial properties.
- To investigate the impact of different terminal modifications on PSC performance.
- To develop highly efficient and stable PSCs using tailored ETMs.
Main Methods:
- Synthesis of three functionalized fulleropyrrolidine ETMs (CEP, CEPE, CECB) with varying secondary terminals.
- Fabrication of inverted structure PSCs utilizing the synthesized ETMs.
- Performance and stability testing of the fabricated devices under operational conditions.
Main Results:
- The CECB-based PSC demonstrated a power conversion efficiency (PCE) exceeding 19%.
- The device exhibited exceptional photo-stability, maintaining performance for over 1800 hours.
- Functionalization of fullerene ETMs significantly improved interfacial coordination and device characteristics.
Conclusions:
- Targeted terminal design of fullerene ETMs is effective for enhancing PSC efficiency and stability.
- The CECB fullerene derivative represents a promising ETM for next-generation perovskite solar cells.
- This research offers valuable insights for developing advanced materials for photovoltaic applications.
