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Updated: Jul 2, 2025
11:38
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
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Synergetic interfacial conductivity modulation dictating hysteresis evolution in perovskite solar cells under
Rana Yekani1, Han Wang1, Stephanie Bessette1
1Materials Engineering Department, McGill University, Montreal, QC H3A 0C5, Canada. george.demopoulos@mcgill.ca.
Physical Chemistry Chemical Physics : PCCP
|February 26, 2024
Summary
The interface configuration of compact titanium dioxide (c-TiO2) electron transport layers significantly impacts perovskite solar cell (PSC) performance and hysteresis. Planar c-TiO2 enhances fill factor with light soaking, unlike scaffold-based designs.
Area of Science:
- Materials Science
- Renewable Energy
- Device Physics
Background:
- Perovskite solar cells (PSCs) are a promising renewable energy technology.
- The electron transport layer (ETL) plays a critical role in PSC performance and stability.
- Interface engineering of ETLs is crucial for optimizing charge extraction and minimizing hysteresis.
Purpose of the Study:
- To investigate the influence of compact titanium dioxide (c-TiO2) ETL configuration on the fill factor (FF) and hysteresis in PSCs.
- To compare the performance of planar c-TiO2 ETLs with those based on a scaffold architecture.
- To elucidate the interfacial dynamics governing PSC performance under varying operational conditions.
Main Methods:
- Fabrication and characterization of PSCs with planar and scaffold-based c-TiO2 ETLs.
- Analysis of fill factor (FF) changes with prolonged light soaking and scan rate.
- Electrochemical impedance spectroscopy (EIS) to study interfacial charge transport dynamics.
Main Results:
- Planar c-TiO2 ETLs exhibit significant FF improvement with light soaking, contrasting with scaffold-based PSCs.
- Increased thickness of planar c-TiO2 ETLs benefits FF retention during forward scans.
- Interfacial conductivity modulation at the perovskite/transport layer interface dictates performance variations.
Conclusions:
- The configuration of the c-TiO2 ETL interface is a key factor in modulating FF and hysteresis in PSCs.
- Planar c-TiO2 offers advantages for FF stability, particularly under prolonged illumination.
- Understanding interfacial dynamics is essential for designing high-performance and stable PSCs.
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