Development of lead-free perovskite solar cells: Opportunities, challenges, and future technologies oleh Asir Eliet Magdalin, Peter Daniel Nixon, Elangovan Jayaseelan, Murugesan Sivakumar, Suresh Kumar Narmadha Devi, M.S.P. Subathra, Nallapaneni Manoj Kumar, Nallamuthu Ananthi