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Naphthalene-Based Passivators for Efficient Perovskite Solar Cells: Synergistic Defect Passivation and Charge
Xin Jiang1, Zunhan Yang2, Hang Deng1
1Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, P. R. China.
Small Methods
|January 14, 2026
Summary
A new material, 1-naphthalenethylamine iodide (NEAI1), enhances perovskite solar cells (PSCs) by reducing defects and improving charge transfer. This leads to high efficiency and excellent long-term operational stability.
Area of Science:
- Materials Science
- Photovoltaics
- Surface Chemistry
Background:
- Perovskite solar cells (PSCs) require effective surface defect passivation for improved optoelectronic properties and stability.
- Designing passivators that enhance both surface passivation and charge extraction is critical for advancing PSC technology.
Purpose of the Study:
- To introduce a novel dual-site synergistic passivation material, 1-naphthalenethylamine iodide (NEAI1), for perovskite films.
- To investigate the impact of NEAI1 on the efficiency and stability of perovskite solar cells.
Main Methods:
- Incorporation of NEAI1 into the interfacial passivation layer between perovskite films and the hole transport layer (HTL).
- Utilizing theoretical calculations to analyze NEAI1's electronic properties and interfacial charge transfer capabilities.
- Fabrication and characterization of perovskite solar cells incorporating NEAI1.
Main Results:
- NEAI1 demonstrated a champion power conversion efficiency (PCE) of 25.33%.
- Devices retained 93.47% of their initial efficiency after approximately 2200 hours of storage, indicating excellent operational stability.
- NEAI1 effectively passivated perovskite defects by coordinating with Pb2+ and compensating for iodine vacancies.
Conclusions:
- NEAI1 serves as an effective low-cost, structurally simple passivator for perovskite solar cells.
- The dual-site synergistic passivation mechanism enhances both device efficiency and long-term stability.
- NEAI1's π-π regulatory effects and molecular dipole moment contribute to improved interfacial charge transfer.
