With the dawning of 21st century, governments faced three urgent challenges, global economic crisis, energy crisis and global warming. So, the research goals have directed on developing novel renewable-energy technologies as suitable alternative sources of the traditional energy that addresses these problems. Photovoltaic based solar cells technology gives sustainable solutions and depends on inorganic materials with specific properties. Among this family, halide perovskites (MBX3) have been investigated during the last five years. Besides studying their unique properties as flexible structures, high stability, tunable semiconductor band-gap (Eg < 2.50 eV), high charge-carrier mobility and large optical absorption, research also seek for promising and multifaceted electroptical applications that give an amazing power efficiency (~24.0 %) in photovoltaic technology. The current challenge is to synthesis MBX3 materials provide suitable properties, include notable chemical stability at high temperatures, high electrical power efficiency, broad emission and tunable semiconducting Eg. Motivated by the site substitution effect, we extended this concept to build a series of cesium-metalloid MBX3 (M1+ = Cs; B2+ = Si, Ge, Sn, Pb; X– = Cl, Br, I), and investigate their structural, stability and optoelectronic properties. We expect these investigations will provide inspiration for an innovation of such MBX3 materials in photovoltaic applications.
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