Citation: Wei, Wen-Juan; Li, Chao; Li, Lin-Sui; Tang, Yun-Zhi; Jiang, Xing-Xing; Lin, Zhe-Shuai (2019). Phase transition, optical and dielectric properties regulated by anion-substitution in a homologous series of 2D hybrid organic--inorganic perovskites. Journal of Materials Chemistry C, 7, pp. 11964-.