Thermoelectric device (IMAGE) National Institute for Materials Science, Japan Caption Figure. (a) Enlarged view of a π junction composed of two types of thermoelectric layers connected by a metal electrode. (b) Photo of the thermoelectric device consisting of an array of π junctions. Credit National Institute for Materials Science Isao Ohkubo OHKUBO.Isao@nims.go.jp Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.