Volatile surface coordination prevents non-toxic tin-based perovskite transistors exposed to air/ heat stress from degrading/ oxidizing

https://www.eurekalert.org/news-releases/1135033

"p-type transistor... Volatile Surface Reconstruction: cesium-tin-iodide semiconductor layer potassium acetate treated forcing unstable defect-forming surface tin ion conversion to volatile compound evaporating under mild heat... simultaneously, vacated surface gaps filled with potassium iodide, forming self-protective passivation shield against ambient oxygen/ moisture... >50 cm^2/V field-effect hole mobility, >100 mn on/off current ratio, structurally stable at 100°}for >month... commercialization"