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Enhanced Performance and Stability of Perovskite Solar Cells Through Surface Modification with Benzocaine
Zukang Chen1,2, Shuguang Cao1,2, Shizi Luo1,2
1Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Chinese Academy of Sciences, Guangzhou 510640, PR China.
ACS Applied Materials & Interfaces
|September 16, 2024
Summary
Benzocaine hydrochloride (BHC) effectively passivates perovskite solar cells by reducing surface defects. This enhances both the efficiency and stability of inverted p-i-n perovskite solar cells (PSCs).
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Perovskite solar cells (PSCs) are a promising renewable energy technology.
- Inverted p-i-n PSCs with nickel oxide hole transport layers face challenges due to surface defects limiting efficiency and stability.
- Cost-effective interface modifiers are essential for commercializing PSCs.
Purpose of the Study:
- To investigate benzocaine hydrochloride (BHC) as a passivation agent for inverted p-i-n PSCs.
- To reduce defect density and improve the photovoltaic performance and operational stability of PSCs.
- To understand the mechanism by which BHC enhances PSC properties.
Main Methods:
- Passivation of perovskite films with benzocaine hydrochloride (BHC).
- Fabrication and characterization of inverted p-i-n PSCs.
- Density Functional Theory (DFT) calculations to analyze electronic structure and interface interactions.
- Optical and electrical characterization of device performance.
Main Results:
- BHC passivation reduced defect density and improved perovskite film morphology.
- Enhanced surface energy level alignment and charge carrier transport were observed.
- Power conversion efficiency (PCE) increased from 20.0% to 22.1%.
- Improved device stability and open-circuit voltage (Voc) and fill factor (FF) were achieved.
Conclusions:
- Benzocaine hydrochloride (BHC) is an effective multifunctional passivant for inverted p-i-n PSCs.
- BHC enhances PSC performance by improving band alignment and preventing charge carrier recombination.
- The study demonstrates a viable strategy for cost-effective improvement of PSCs.
