Efficient CH3NH3PbI3 Perovskite Solar Cells with Improved Fill Factor via Interface Engineering
Paper ID : 1265-ICNS
Authors:
Farzaneh Sadat Ghoreishi *1, Vahid Ahmadi2, Reza Poursalehi3, Mahmoud Samadpour4, Malin Johansson5, Gerrit Boschloo5, Erik Johansson6
1Tarbiat Modares University
2Department of Electrical & Computer Engineering, Tarbiat Modares University, Tehran, Iran
3Department of Nanotechnology Engineering, Tarbiat Modares University, Tehran, Iran
4Department of Physics, K.N. Toosi University of Technology, Tehran, Iran
5Department of Chemistry—Ångström-Laboratory, Institution of Physical Chemistry, Uppsala University, Uppsala Sweden
6Department of Chemistry—Ångström-Laboratory, Institution of Physical Chemistry, Uppsala University, Uppsala Sweden
Abstract:
Interface engineering in perovskite solar cells is a crucial parameter to gain high power conversion efficiency by reducing electron-hole recombination and accelerating charge carrier extraction. In this research, a new material namely benzyl ammonium iodide (BAI) is used, to modify the interface between methylammonium lead triiodide (MAPbI3) perovskite and Spiro-OMeTAD as a hole transport layer in solar cell devices. The structural and optical properties of the perovskite films are studied, and the X-ray diffraction patterns and photoluminescence results reveal the formation of a two-dimensional perovskite interfacial layer on the surface of the MAPbI3 film modified with BAI. The BAI bulky cation has a large molecular radius that results in the isolation of the metal halide layers in the 3D architecture and thus transforms it into a 3D/2D perovskite. In addition, slower open-circuit voltage decay is observed for the modified cells which in the total lead to the improvement of the photovoltaic performance.
Keywords:
"perovskite solar cells” “methylammonium lead triiodide” “interface engineering” “benzyl ammonium iodide”
Status : Abstract Accepted (Oral Presentation)