Materials (Basel) Materials (Basel) Exploring tantalum as a potential dopant to promote the thermoelectric performance of zinc oxide Arias-Serrano Blanca I. Xie Wenjie Aguirre Myriam H. Universidad de Zaragoza Tobaldi David M. Sarabando Artur R. Rasekh Shahed Mikhalev Sergey M. Frade Jorge R. Weidenkaff Anke Kovalevsky Andrei V. 2019 research-article