Advances in stable and flexible perovskite solar cells Wali, Qamar ; Iftikhar, Faiza Jan ; Elumalai, Naveen Kumar ; Iqbal, Yaseen ; Yousaf, Sidra ; Iqbal, Shahid ; Jose, Rajan Abstract Publication: Current Applied Physics Pub Date: May 2020 DOI: 10.1016/j.cap.2020.03.007 Bibcode: 2020CAP....20..720W