Your stability test is only as harsh as your lamp's UV — and most lamps fade
This is a sponsored article, by Lumartix
Plasma-lit climatic, altitude and thermal-shock chambers that hold the full AM1.5G or AM0 spectrum, UVA + UVB (+ UVC), for the entire duration of the ageing run.
Perovskite research has changed its unit of measurement. Efficiency records still make headlines, but the numbers that now decide whether a device gets published, funded or flown are T80 lifetimes, retention after thousands of hours under continuous illumination, and the ISOS protocol used to get there.

That shift puts an uncomfortable amount of weight on a single instrument: the lamp.
The two blind spots in accelerated ageing
LED simulators stop where the interesting chemistry starts. They are stable, efficient and have become the default for light soaking. But below roughly 350 nm they have little to offer, and UVB and UVC are simply absent from the spectrum. Every degradation pathway driven by high-energy photons stays invisible for the whole test.
