Related Experiment Video
Updated: Jun 9, 2026
11:38
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Modulation of Crystal Plane Growth for Efficient and Stable Perovskite Solar Cells
Kaikai Liu1, Jiacheng He2, Zhao Guo1
1College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, Nanchang, China.
Angewandte Chemie (International Ed. in English)
|June 7, 2026
Summary
Researchers developed a novel lead iodide (PbI2) template using 2-phenoxyacetamidine hydrochloride (PhOAaCl) to enhance perovskite solar cell efficiency and durability. This method improves crystal orientation and phase purity, leading to a 26.47% champion efficiency and excellent stability.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Controlling perovskite crystal orientation and phase purity is crucial for efficient and durable perovskite solar cells.
- The lead iodide (PbI2) template in two-step deposition offers advantages but faces challenges due to complex PbI2 facets hindering preferential crystal growth.
Purpose of the Study:
- To develop a highly crystalline PbI2 template with (001)-preferred orientation for improved perovskite film growth.
- To investigate the underlying growth mechanisms at the PbI2/organic amine salt interface.
- To enhance the efficiency and stability of perovskite solar cells.
Main Methods:
- Incorporation of 2-phenoxyacetamidine hydrochloride (PhOAaCl) into the PbI2 precursor to minimize crystal plane energy and achieve (001)-preferred orientation.
- Fabrication of perovskite films using the modified PbI2 template in a two-step deposition process.
- Analysis of the solid-liquid interface growth mechanism using thermodynamic and kinetic perspectives.
- Device fabrication and performance testing, including efficiency measurements and long-term stability under damp-heat and operational stress.
Main Results:
- Attainment of highly crystalline PbI2 with complete (001)-preferred orientation.
- Orchestration of coherent perovskite crystal growth with suppressed defect density and exceptional phase purity.
- A champion power conversion efficiency of 26.47% for the fabricated photovoltaic device.
- Outstanding damp-heat endurance and operational robustness, retaining 91% of initial efficiency after 2500 hours of continuous operation.
Conclusions:
- The PhOAaCl-modified PbI2 template effectively guides perovskite crystal growth, leading to superior film quality.
- The study elucidates the interface growth mechanism, providing insights for further material optimization.
- The developed perovskite solar cells demonstrate high efficiency and remarkable long-term stability, paving the way for commercial applications.
