Halogen regulation of inorganic perovskites toward robust triboelectric nanogenerators and charging polarity series

CsPbX₃(X = Cl⁻, Br⁻, I⁻) halide perovskites are investigated focusing on their triboelectric charging behaviors. A modified series containing inorganic perovskites is established with the order of CsPbBr₃, CsPbI₂Br, and CsPbCl₃ from negative to positive.