Vapor-assisted dip-coating of wide-bandgap perovskites: Suppressing Back-diffusion of solute via optimized withdrawal speed - Shifu Zhang; Zexian Dong; Yicheng Qian; Dongrui Jiang; Jinzhao Li; Zhixin Ren; Sheng He; Haixiao Zhu; Yuan Qiu; Qian Zhao; Shougen Yin; Huanqi Cao (Chemical Engineering Journal, 2026)