| 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) |
