More than half century, crystalline silicon solar cells struggle to reach over 20% power conversion efficiencies (PCEs). Still, the complex procedures in industry escalate its payback time. Copper indium gallium selenide (CIGS) and cadmium telluride (CdTe), shows more than 19 % PCE for 1 cm 2 cells, and they used to be a promising second-generation thin-film solar cells. [1] However, they are facing difficulties in rare elements and large-scale production. [2] When it was first reported in 2009 with less than 4% PCE, [3] scientists would never think perovskite type CH3NH3PbX3 solid solar cells can reach PCE over 25%, [4] in barely 10 years. The astounding progresses achieved in the past 10 years suggests that it is a better candidate for the next generation solar cells. [5-11] Publisher's Note Engineered Science Publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.