We use cookies to improve your experience and for marketing. Read our cookie policy or manage cookies.
Search across reports, market insights, and blog stories.
Scientists at the Institute of Science and Technology Austria (ISTA) have identified a mechanism that accounts for the remarkable photovoltaic efficiency of lead-halide perovskites, despite their inherently disordered atomic arrangement. Their research points to flexoelectric polarization occurring at strain-induced domain boundaries, which creates internal electric fields that separate charge carriers, limit recombination, and facilitate long-distance charge movement even when intrinsic exciton decay is rapid.
The investigation was prompted by a fundamental puzzle: how perovskite solar cells can achieve performance comparable to silicon devices, even though they are manufactured using straightforward, inexpensive solution-based methods. Silicon photovoltaics, by contrast, demand exceptionally pure materials and energy-intensive processes to produce nearly perfect single crystals. The team deliberately selected large single-crystal cubic methylammonium lead bromide (MAPbBr3) for their experiments to confirm that the observed effects are inherent to lead-halide perovskites, rather than stemming from a low-symmetry phase or sample surface artifacts.
In their experiments, the researchers employed nonlinear optical excitation to generate electrons and holes deep within a perovskite crystal. They recorded a reproducible current that flowed consistently in one direction each time a new set of charge carriers was produced, even though no voltage was applied. This outcome demonstrated that internal forces are actively separating opposite charges inside the single crystals.
Using polarized-light and temperature-dependent measurements, the team discovered that solution-grown MAPbBr3 possesses an intrinsic structural distortion even in its high-temperature phase, contradicting the assumption of perfect cubic symmetry. Polarization data further indicated that the material functions as a ferroelastic system, where deviations from cubic structure are limited to domain walls rather than representing a uniform lattice deformation.
By applying localized two-photon excitation to MAPbBr3 single crystals, the researchers identified a spatially varying photocurrent at zero bias, confirming the existence of internal electric fields without any external voltage. These observations align with polarization restricted to ferroelastic domain walls, which generate electrostatic potential differences while maintaining overall inversion symmetry in the bulk. Comparable behavior in methylammonium lead iodide (MAPbI3) implies that flexoelectric domain walls could represent a universal mechanism for local symmetry breaking across lead-halide perovskites.
The study concludes that charged domain walls serve as dynamic, adjustable transport pathways that both separate charge carriers and regulate their recombination, thereby connecting mesoscopic strain patterns to photovoltaic performance. The authors emphasize that whereas silicon technology relies on eliminating impurities, perovskites benefit from structural disorder, offering a physical rationale for many of the materials’ known characteristics.
Making Data-Driven Decisions to Grow Your Business
A Quick Overview of Market Performance
Understanding the Current State of The Market and its Prospects
Finding New Products to Diversify Your Business
Choosing the Best Countries to Establish Your Sustainable Supply Chain
Choosing the Best Countries to Boost Your Export
The Latest Trends and Insights into The Industry
The Largest Import Supplying Countries
The Largest Destinations for Exports
The Largest Producers on The Market and Their Profiles
The Largest Markets And Their Profiles
Instant access. No credit card needed.
Online access to 2M+ reports, dashboards, and tables. Trusted by Fortune 500 teams.
IndexBox, Inc.
2093 Philadelphia Pike #1441
Claymont, DE 19703, USA
Contact us
© 2026 IndexBox, Inc
Instant access. No credit card needed.
Online access to 2M+ reports, dashboards, and tables. Trusted by Fortune 500 teams.

source