What type of solar panels do calculators use?

Question

i am doing a research project on solar energy, and i was just wonder what kind of solar panels do calculators such as the Texas Instruments- 30x iis use --thank you greatly :)

Answer 1

They're called Amorphous silicon cells. They're about 7% efficient.

Answer 2

they are small flex film cells. Usually 1.5 vdc

Answer 3

Teenie weenie ones. (I couldn't resist.)  Silicon, like the bigger ones?