DIY OLEDs

manuka

Senior Member
Well you have to give them credit for the application, but this is hardly "kitchen sink" chemistry. I rather like their use of a microwave oven as a kind of hi-tech bunsen burner, but most of the reagents mentioned -eutectic mixture of 75.5% gallium and 24.5% indium or [Ru(bpy)3](BF4)2 coating etc- are near unobtainable for the average person.

As all manner of organic PVs have been rustled up using dye-sensitized solar cells ( & even some fruit juices!), perhaps a red cabbage extract OLCD may be more appealing...
 

westaust55

Moderator
Maybe anyone with an older style thermomenter could try their luck since the nearly eutectic alloy of gallium, indium, and tin is a room temperature liquid which is widely available in medical thermometers

Gallium is found and extracted as a trace component in bauxite. Here in Perth, West Aust we have a number of Bauxite mines only 100km to the south of us. A pilot plant was built around 10 years to extract Gallium but never went into greater production.
 
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manuka

Senior Member
I've long had a sneaking regard for Gallium,with it's "melts in your hand" liquidity at room temperature especially mesmerising. So called Galinstan fever thermometers -being a Gallium, Indium,Tin alloy (68.5% Ga, 21.5% In, 10% Sn) - are indeed used in some medical thermometers instead of hazardous mercury. It'd probably be feasible to verify the thermometer type using a home freezer,as this alloy has a freezing point of −19 °C (−2.2°F). That's just a regular winters day in some parts of the US & Europe of course!

Stan - of Stan's Law ("You can never have too many thermometers")
 
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