Table 2.

Summary of the key properties to predict lead free perovskites.

CsPbI 3 Less Optical Absorption Medium Photoconductivity Highly Ductile	CsPbBr 3 Less Optical Absorption Less Photoconductivity Highly Ductile	CsPbCl 3 Less Optical Absorption Less Photoconductivity Highly Ductile
CsSnI 3 Medium Optical Absorption Medium Photoconductivity Highly Brittle	CsSnBr 3 Medium Optical Absorption Less Photoconductivity Ductile	CsSnCl 3 Medium Optical Absorption Less Photoconductivity Ductile
CsGeI 3 High Optical Absorption High Photoconductivity Less Brittle	CsGeBr 3 High Optical Absorption Medium Photoconductivity Ductile	CsGeCl 3 High Optical Absorption Medium Photoconductivity Ductile