German scientists have developed a new method: to convert heat into electricity through pencils and paper!backgroundThermoelectric effect, also known as "thermoelectric effect", is not a new thing. About 200 years ago, German scientist Thomas J. Seebeck discovered this effect. In short, thermoelectric effect refers to the process of voltage generation due to temperature difference in special materials. Generally speaking, when one end of the material is hot and the other end is cold, the charge carrier will move from the hot end to the cold end, forming an electromotive force, thus generating a volt...