The use of thin Si wafers and streamlined fabrication methods that can be scaled up without compromising device efficiency is a key strategy for realizing low-cost and flexible solar cells. Herein, Al-catalyzed Si nanowires (NWs) formed by vapor-liquid-solid growth on paper-thin polished and etched Si(111) wafers of 100 and 60 um-thick with high proficiency for minimizing interfacial defects and light absorption loss has been accomplished. Fabrication of thin Si NW solar cells with homojunction p⁺-p-n-n⁺ structure toward enhanced power conversion efficiency by hybrid nanostructures with CsPb_0.81Mn_0.19Cl₃ perovskite nanocrystals using simple drop-casting method has been explicitly explained.