# Tandem solar cell achieves certified 35.1% efficiency in laboratory study

_Published Thursday, November 5, 2026 at 2:49 PM EST · Science · Latest · Tier 2 — Notable_

Researchers report a perovskite/silicon tandem solar cell with certified stabilized power conversion efficiency of 35.1% in Nature. They engineered a molecular interface that coats rough silicon textures uniformly while preserving the movement of electrical charge.

The design changes molecular shape to suppress excessive aggregation, addressing a tradeoff between conductivity and surface coverage. The device retained more than 94% of its initial performance after 1,500 hours of ageing under the ISOS-L-1 protocol. That durability result is specific to the stated laboratory ageing test.

## Sources

- [Nature](https://www.nature.com/articles/s41586-026-11226-8)

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Canonical: https://techandbusiness.org/newswire/WnxxfOyOdY-sy8qICiKkim
Published: 2026-11-05T19:49:46.087Z
Story chronology: 2026-11-04T00:00:00.000Z
Retrieved: 2026-11-06T23:04:37.174Z
Publisher: Tech & Business (techandbusiness.org)