Yu Xiao,* Wei Liu, Yang Zhang, Dongyang Wang, Haonan Shi, Sining Wang, Yang Jin, Wanbo Qu, Haijun Wu,* Xiangdong Ding, Jun Sun and Li-Dong Zhao, Rationally optimized carrier effective mass and carrier density lead to high average ZT value in n-type PbSe, Journal of Materials Chemistry A, accepted.