Halide Ion Segregation
What causes halide ion segregation in mixed-halide perovskites?
Light exposure and thermal stress
What is the main purpose of the nanomachine in PSCs?
To trap migrating halide ions and prevent phase segregation
What polymer is used to embed the nanomachine in PSCs?
PMMA (Polymethyl methacrylate)
What is one key requirement for making PSCs commercially viable?
Enhanced long-term stability
What photoluminescence feature signals halide ion segregation?
A redshift in the emission spectrum
How does the nanomachine reset itself at night?
Through passive thermal relaxation.
Why is choosing the right thickness for the PMMA layer important?
Too thick blocks charge transport; too thin allows ion migration
Name a company involved in perovskite solar cell development.
Oxford PV, Saule Tech, or First Solar
How does segregation affect charge carrier lifetime?
It shortens carrier lifetime due to increased nonradiative recombination
Why is UV activation a limitation for azobenzene-based nanomachines in solar cells?
Because UV light is mostly absent in the solar spectrum
What are the two integration methods for nanomachines in PSCs?
In-situ doping and thin-film layering
What makes PMMA-based nanomachine films scalable for industry?
Compatibility with spin-coating and batch processing