S1 Supporting Information Establishing the Golden Range of Seebeck Coefficient for Maximizing Thermoelectric Performance Min Hong, †,‡ Wanyu Lyu, † Yuan Wang, † Jin Zou, *,‡,# and Zhi-Gang Chen *,†,‡ † Centre for Future Materials, University of Southern Queensland, Springfield, Queensland 4300, Australia. ‡ School of Mechanical and Mining Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia. # Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, Queensland 4072, Australia. * Email: j.zou@uq.edu.au; zhigang.chen@usq.edu.au, zhigang.chen@uq.edu.au