Controllable in situ sodium doping induces uniform nucleation of self-supplied selenium precursor enables large-grain spanning kesterite absorber - Qing Zhou; Junhui Hei; Jiahui Ma; Zihang Liu; Zihan Guo; Yali Sun; Xinzhan Wang; Xiaobing Yan; Zeran Gao; Xiaoyun Teng; Chao Gao; Wei Yu (Chemical Engineering Journal, 2025)