← No. 023 THU 22 OCT 2026

Room‑air‑coated solar cells turn a quarter of sunlight.

perovskite solar cells

On Aug 13, 2026, researchers reported perovskite solar cells whose key solution layers were blade‑coated in ordinary room air. One single cell was independently certified at about a quarter sunlight‑to‑electricity (26.5%), and a module reached 23.2%. Under uninterrupted light, devices kept 99.8% of their starting output after 1,200 hours. Not every layer was made in air, but the high, certified performance came from ambient‑coated films.

Why it’s interesting

Fig. 023 Exposure rings with a highlighted band encode ~99.8% performance retained after 1,200 hours of light.

Why it’s interesting

It shows these cells can leave the dry box for key steps and still earn top, certified numbers. That nudges perovskites closer to scalable, factory‑friendly coating lines—if the stability holds in wider testing.

The longer version

Many top perovskite cells are made in dry boxes on small, spin‑coated samples. This study instead blade‑coated the crucial solution layers in ordinary room air and still delivered top‑tier performance: roughly a quarter of sunlight turned into power in a single cell, with modules close behind.

Published Aug 13, 2026 in Nature Sustainability, the work includes an independent certificate for a 26.47% single‑junction cell and a 23.2% module. Under continuous light, devices held 99.8% of their starting output for 1,200 hours. Some layers—like fullerene/BCP and metal contacts—were still vacuum‑deposited; the perovskite absorber and a transport layer were the ones blade‑coated in ambient air.

Edition: No. 023
Date: Thursday 22 October 2026
Subject: perovskite solar cells
Period: 2026-08-13
Field: technology
Evidence: 3 sources, 2 primary

See how we got here

Found after 24 research paths · Selected from 6 candidates

01 Solar manufacture Gloveboxes keep moisture out.
02 Perovskite cells Often spin‑coated in dry rooms.
03 Blade coating A scalable, squeegee‑like method.
04 Room air films Perovskite and PNCC coated in air.
05 Certified result 26.47% single; 23.2% module; 1,200 h at 99.8%.
→ Room‑air‑coated solar cells turn a quarter of sunlight.

Sources

Nothing publishes without independent sources. How we verify →

1
Scalable ambient fabrication of single-junction and perovskite–silicon tandem solar cells
Nature Sustainability (Nature Portfolio) · 2026 · peer reviewed Primary

Reports ambient‑air, blade‑coated devices; 26.6% (26.5% certified) single‑cell; 23.2% module; 99.8% retention after 1,200 h light soaking; publication date 2026‑08‑13.

nature.com
2
Supplementary Information for ‘Scalable ambient fabrication of single‑junction and perovskite–silicon tandem solar cells’
Nature Sustainability (Nature Portfolio) · 2026 · peer reviewed Primary

Shows independent certification of the single‑junction device at 26.47% PCE (Supplementary Fig. 16) and module details (Supplementary Fig. 22).

media.springernature.com
3
Chinese scientists build 33.3%-efficient perovskite-silicon tandem solar cell processed in ambient air
pv magazine Global · 2026 · journalism

Corroborates the ambient blade‑coated fabrication, 26.6% champion and 26.5% certified single‑cell results, and reports additional stability metrics; specifies that PNCC and perovskite layers were blade‑coated in ambient air.

pv-magazine.com

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