This is innovative advertising and it shows the power of print! The ad, which ran in the Brazilian magazine Veja Rio, includes a wafer-thin solar panel and a phone plug for charging.
What might appear as a marketing gimmick is not far from reality. The Technical University in Chemnitz, Germany, presented a technology to print solar cells on paper already in 2011 The technology is called 3PV (printed paper photo voltaics) and uses a normal print process to apply special ink with electrical properties to paper. Electricity is generated when the paper is exposed to light.