**Contents**


Environment-Induced Reversible Modulation of Optical and Electronic Properties of Lead Halide Perovskites and Possible Applications to Sensor Development: A Review Reprinted from: *Molecules* **2021**, *26*, 705, doi:10.3390/molecules26030705 . . . . . . . . . . . . . . **135**


Reprinted from: *Molecules* **2021**, *26*, 1355, doi:10.3390/molecules26051355 . . . . . . . . . . . . . . **265**
