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Improved Perovskite/Carbon Interface through Hot-Pressing: A Case Study for CsPbBr3-Based Perovskite Solar Cells
Teng Zhang1, Chengben Liu2, Zhi Li3
1School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China.
ACS Omega
|June 1, 2022
Summary
A new pressure-assisted method improves the interface contact in carbon-based perovskite solar cells (PSCs). This technique enhances power conversion efficiency, particularly for large-scale devices, making PSCs more viable for real-world applications.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Carbon-based perovskite solar cells (PSCs) offer low cost and printability.
- Poor perovskite/carbon interface contact limits fill factor and overall efficiency in PSCs.
- Developing efficient interfaces is crucial for commercializing PSC technology.
Purpose of the Study:
- To introduce and evaluate a pressure-assisted method for improving perovskite/carbon interface contact.
- To enhance the power conversion efficiency (PCE) of carbon-based PSCs, especially for large-area devices.
Main Methods:
- A novel pressure-assisted technique, including pressing and hot-pressing, was applied to the perovskite/carbon interface.
- The effect of applied pressure on interfacial contact and device performance was systematically investigated.
- Performance metrics, including power conversion efficiency and fill factor, were measured for small and large-area devices.
Main Results:
- Small-area CsPbBr3 PSCs achieved improved PCEs of 7.95% (pressing) and 8.34% (hot-pressing), up from 7.40%.
- Hot-pressing significantly boosted the PCE of large-scale (0.5 cm2) devices from 5.1% to 6.9%, a >30% enhancement.
- The pressure-assisted method effectively improved interfacial contact, leading to higher device performance.
Conclusions:
- The pressure-assisted method, particularly hot-pressing, is a promising strategy for enhancing carbon-based PSC efficiency.
- This technique shows significant potential for improving the performance of large-scale PSCs, addressing a key challenge for commercialization.
- Optimized interfacial contact via hot-pressing facilitates the practical application of cost-effective carbon-based solar cells.
