Controlling the Preferred Orientational Growth of Two-Dimensional Perovskite BA2MA2Pb3I10
Paper ID : 1321-ICNS
Authors:
Hamoon Kheirabadi1, Mohammad Reza Golobostanfard *2, Hosein Abdizadeh3
1Materials Science and Engineering University of Tehran Tehran Iran
2University of tehran
3University of Tehran
Abstract:
Two-dimensional (2D) perovskite solar cells (PSCs) have attracted researchers all around the world due to their significantly superior stability compared to ordinary three-dimensional PSCs. However, they usually do not have the desirable photovoltaic performance owing to their relatively large band gap and weak carrier transportation. Therefore, some approaches should be proposed to overcome this issue. In this work, growth orientation of a 2D perovskite absorber, BA2MA2Pb3I10 with n = 3 from a layered perovskite family with general formula of BA2MAn-1PbnI3n+1, has been studied. Improvement in orientational growth of 2D perovskite nanosheets, perpendicular to the substrate can significantly enhance the carrier transportation of PSCs, thus improving the otherwise low photovoltaic conversion efficiencies of 2D PSCs. The temperature of the spin-coating process was modified. By applying a temperature of 150 °C preferred orientational growth of 2D perovskite absorbers were intensified. In addition, by studying the resultant perovskite films in various annealing times, the optimal annealing time approximate to 10 min was realized.
Keywords:
perovskite solar cells, two-dimensional nanomaterial, Ruddlesden-Popper, spin-coating method
Status : Abstract Accepted (Poster Presentation)