Figure 1: (image) Science China Press Share Print E-Mail Caption Schematics of longitudinal (a) and transverse (b) thermoelectric modules. While n and p type materials are needed for the longitudinal thermoelectric module, one material with compensated electrons and holes suffices in the transverse case. Credit ©Science China Press Usage Restrictions Use with credit. Share Print E-Mail 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.