Peltier thermopar for hand heat charging battery

[sophiecentaur]

Now idea is simple, perhaps it will turn out like this?
I have not seen any real examples of such devices.View attachment 369006

A 'flexible semiconductor' of any significant length would not provide local cooling and, as stated above, would be inefficient. Semiconductor devices are usually very thin for this reason. Also some of the heat would be dissipated right next to the item you wanted to cool. The idea is actually off-topic for this thread.

If you are just after a low thermal resistance path then a good thermal conductor would be best (or a circulating fluid perhaps). Heat pipes were invented a few years ago and would do what you propose without any heat - electricity conversion. They work better than a copper bar, for instance and have the advantage of being made curved to fit inside electronics.