# Tags: Solar Research

![Illustration of a UK home with rooftop solar panels and a home battery.](/uploads_resolved/images/604/320.webp)

## [Perovskite Mini-Module Reaches 23.9%: What It Means](/resources/perovskite-mini-module-fill-factor-239-percent/)

**By:** David Coleman · **Published:** 2026-11-05 20:06:26 · **Updated:** 2026-11-05 12:06:37

A peer-reviewed study reports a certified 23.9% perovskite mini-module. Understand its 19.48 cm2 test area and the gap between a lab result and roof panels.

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![A realistic photograph of a UK university materials laboratory bench in daylight, with a small crystalline semiconductor sample on a glass slide beside a simple optical...](/uploads_resolved/images/1037/320.webp)

## [Oxford Finds a New Route to More Efficient Solar Cells Using Pseudo-Direct Semiconductors](/resources/pseudo-direct-semiconductor-uk/)

**By:** David Coleman · **Published:** 2026-10-29 18:29:22 · **Updated:** 2026-10-29 11:30:25

Oxford's pseudo-direct semiconductor work is not a UK roof product. The 75% Bi2S3 figure is recombination suppression, not module efficiency.

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