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Updated: Feb 24, 2026

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition

Published on: July 26, 2016

High Stability Bilayered Perovskites through Crystallization Driven Self-Assembly.

Teck Ming Koh¹, Junye Huang¹, Ishita Neogi¹

¹Energy Research Institute at Nanyang Technological University (ERI@N) , Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Avenue, Singapore 637553, Singapore.

ACS Applied Materials & Interfaces

|August 12, 2017

Summary

This summary is machine-generated.

Researchers developed new bilayered hybrid perovskites with enhanced stability. This 2D/3D perovskite structure offers high moisture resistance and could advance photovoltaic technology.

Keywords:

air stability bilayered perovskite mixed-dimensionality phase separation self-assembly

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Last Updated: Feb 24, 2026

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Area of Science:

Materials Science
Solid-State Chemistry
Photovoltaics

Background:

Hybrid perovskites are promising for solar cells but often suffer from poor stability.
Developing novel perovskite structures is crucial for overcoming current limitations.

Purpose of the Study:

To synthesize and characterize a new family of lower-dimensional bilayered hybrid perovskites.
To investigate the self-assembly crystallization process and its effect on stability.
To evaluate the potential of these materials for high-efficiency and stable photovoltaics.

Main Methods:

Formation of (CHMA)2(MA)n-1Pb nI3 perovskites (n=1-5) via a crystallization-driven self-assembly process.
Solution processing involving spun-coating and subsequent annealing.
Phase separation analysis during annealing to form 2D/3D bilayered structures.

Main Results:

Successful formation of a new lower-dimensional perovskite family: (CHMA)2(MA)n-1Pb nI3.
Crystallization-driven self-assembly leads to 2D/3D bilayered hybrid perovskites.
Achieved high ambient stability up to 65 days with striking moisture resistance.

Conclusions:

The bilayered 2D/3D perovskite architecture offers a pathway to enhanced stability.
Combining 3D perovskites (for electronic properties) and 2D perovskites (for moisture stability) is a promising strategy.
This approach could usher in a new era for high-efficiency, stable perovskite solar cells.