Chloro·benzene is used as an antisolvent during this process to improve the crystallinity of perov·skite solar cells. For 10 points each:
[10h] Name this technique of preparing thin films by centrifuging a volatile ink that spreads out and dries on the target substrate. It is an easy way to make photo·resists for micro·fabrication.
ANSWER: spin coating [or spin casting; prompt on coating or casting]
[10e] Painting with perov·skite inks is far easier than the traditional method of making photo·voltaic silicon: the “chemical vapor” form of this phase transition from a gas to a solid.
ANSWER: deposition [or desublimation; or depositing; accept chemical vapor deposition; prompt on CVD by asking “what does that stand for?”]
[10m] Due to its toxicity, chloro·benzene is being phased out as an antisolvent in favor of this greener organic solvent. This ester is the product when a two-carbon alcohol condenses with a two-carbon carboxylic acid.
ANSWER: ethyl acetate [or EA; or ethyl ethanoate or EtOAc; or ETAC]
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