Realizing High Thermoelectric Performance of Bi-Sb-Te-Based Printed Films through Grain Interface Modification by an In Situ-Grown β-Cu2-δSe Phase

Md Mofasser Mallick, Leonard Franke, Andres Georg Rösch, Sarfraz Ahmad, Holger Geßwein, Yolita M. Eggeler, Magnus Rohde, and Uli Lemmer