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Related Experiment Video

Updated: May 19, 2026

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

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Published on: February 27, 2017

Inherent Compositional Heterogeneity in Alloyed Perovskite Photovoltaics.

Bo Li¹, Meng Zhang¹, Lu Liu¹

¹College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, China.

Small (Weinheim an Der Bergstrasse, Germany)

|May 17, 2026

Summary

This summary is machine-generated.

Alloying metal halide perovskites enhances stability but creates compositional inhomogeneity. This review details how processing-induced heterogeneity degrades device performance and explores strategies for compositional homogenization in perovskite photovoltaics.

Keywords:

compositional heterogeneity compositional homogenization crystallization perovskite solar cells stability

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Area of Science:

Materials Science
Photovoltaics
Solid-State Chemistry

Background:

Metal halide perovskites are crucial for photovoltaics, with alloying enhancing stability and bandgap tunability.
Alloyed perovskites suffer from compositional heterogeneity due to processing, leading to structural disorder and performance degradation.
This heterogeneity, including nanoscale clusters and microscale domains, introduces defects and accelerates degradation.

Purpose of the Study:

To review the multiscale distribution and origins of compositional inhomogeneity in alloyed perovskites.
To elucidate the impact of this inhomogeneity on film quality and device performance.
To discuss emerging strategies for compositional homogenization in perovskite films.

Main Methods:

Literature review of compositional inhomogeneity in alloyed perovskites.
Analysis of film formation processes and their impact on heterogeneity.
Discussion of homogenization strategies at different processing stages.

Main Results:

Compositional inhomogeneity forms during film processing, persisting in final alloyed perovskite films.
Heterogeneity introduces deep traps, perturbs band edges, and limits device efficiency and stability.
Nanoscale clusters and microscale phase-separated domains are key manifestations of inhomogeneity.

Conclusions:

Compositional inhomogeneity is a major limiting factor for efficient and stable perovskite photovoltaics.
Strategies like nucleation engineering, mass transfer modulation, and crystallization control can promote homogenization.
Further research is needed to overcome challenges in achieving uniform alloyed perovskite films for advanced solar cells.