Related Experiment Video
Updated: Jun 12, 2026
08:12
Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
Using Multifunctional Molecular 'Glue' for Bilateral Interface Engineering to Stabilize Perovskite/SnO2 Layers.
Bin Du1, Yuexin Lin2, Weidan Gu1
1School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|June 11, 2026
Summary
Researchers enhanced perovskite solar cell (PSC) efficiency by modifying the interface with L-isoleucine (L-lle). This interface engineering boosts photoelectric conversion efficiency (PCE) and improves device stability.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Perovskite solar cells (PSCs) show high photoelectric conversion efficiency (PCE), exceeding 27%.
- Interface defects in PSCs hinder performance enhancement.
- The buried interface between SnO2 and perovskite is critical for PSC performance.
Purpose of the Study:
- To improve PSC performance and stability by addressing interface defects.
- To introduce L-isoleucine (L-lle) as an interface modifier.
- To investigate the mechanism of L-lle at the buried interface.
Main Methods:
- L-isoleucine (L-lle) was used to modify the interface between SnO2 and perovskite.
- Chemical bonding and esterification reactions at the interface were analyzed.
- Performance and long-term stability of modified PSC devices were evaluated.
Main Results:
- L-lle chemically bonds with lead ions on the perovskite surface.
- L-lle reacts with SnO2 surface hydroxyl groups, enhancing cross-linking and interface contact.
- PSC devices modified with L-lle achieved a PCE of 26.15%, compared to 23.54% for control devices.
- Modified devices retained 92% of initial efficiency after 1200 hours of testing.
Conclusions:
- L-isoleucine effectively passivates interface defects in PSCs.
- Interface modification with L-lle significantly enhances both PCE and operational stability.
- This approach offers a promising strategy for developing high-performance and stable PSCs.
