# Perovskite samples retain electron energy longer

> A Princeton team reported fewer defects and electron-energy retention of up to 300 microseconds in perovskite samples.

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- Section: Technology
- Country: United States
- Published: 2026-10-15T23:48:24+00:00
- Updated: 2026-10-15T23:48:24+00:00
- Event / data period: 2026-10-08
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A Princeton-led team reduced defects in perovskite crystals by adding a mixture of zinc bromide and methylammonium chloride during fabrication. In prepared samples, the researchers reported that electrons retained excess energy from sunlight for up to 300 microseconds.

That retention time was described as about 100,000 times longer than in many semiconductors. The researchers’ estimate of a possible roughly 1% power-generation improvement in advanced perovskite cells is a projected application, not a measured 1% gain in a new solar cell reported by the paper.

## Data

### Research announcement

Methodology: The event date follows the source institution’s announcement. Results are limited to the study or institutional report; prospective applications are not presented as completed products or clinical outcomes.

| date | label | description | status |
|---|---|---|---|
| 2026-10-13 | Perovskite samples retain electron energy longer | A Princeton team reported fewer defects and electron-energy retention of up to 300 microseconds in perovskite samples. | occurred |

Sources: <https://engineering.princeton.edu/news/2026/10/13/building-better-solar-tech-crystal-time> · Download data: [JSON](https://newsverum.com/api/v1/articles/princeton-perovskite-defect-mitigation-energy-retention-2026/data/research-announcement?lang=en&format=json) · [CSV](https://newsverum.com/api/v1/articles/princeton-perovskite-defect-mitigation-energy-retention-2026/data/research-announcement?lang=en&format=csv)

## Sources

- [Princeton Engineering](<https://engineering.princeton.edu/news/2026/10/13/building-better-solar-tech-crystal-time>) (Source checked: 2026-10-15; Published: 2026-10-13)

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