Optimizing seebeck coefficient and thermoelectric efficiency via innovative Nb doping techniques in W₁₈O₄₉

Quy Nguyen Ngoc Le, Michitaka Ohtaki, Wisanu Pecharapa, Thang Bach Phan, Gerald Jeffrey Snyder, Cuong Chi Nguyen, Linh Nguyen Thi Ho, Nhu Hoa Thi Tran, Nhat Quang Minh Tran