Nanomeghyas

Nanomeghyas

The role of 2D perovskite in improving the stability and performance of hole trnasporting layer–free perovskite solar cells

Document Type : Original Article

Authors
Mahnaz Mozaffari 1
ABBAS BEHJAT
Mohammad Ali Haddad 2
Ali Benvidi 3
1 Department of Physics, Faculty of science, Yazd University, Yazd, Iran
2 Department of Physics, Yazd University, Yazd, Iran.
3 Faculty of Chemistry, , Yazd University, Yazd, Iran
Abstract
Considering the importance of the stability of solar cells in their industrialization, 2D perovskites in the interface between 3D perovskite and charge transfer layers play a key role in improving the stability of perovskite solar cells. In this research, 3D triple-cation perovskite and 2D PTA2PbI4 perovskite have been used as light absorbing materials in fabricated solar cells. Considering the penetration of moisture from all sides of the perovskite layer, we investigated 3D/2D, 2D/3D and 2D/3D/2D perovskite structures. Experimental results show that the formation of 2D perovskite above the 3D perovskite (2D/3D) in addition to protecting the 3D perovskite layer against moisture, leads to the improvement of the morphology of the perovskite layer. The formation of 2D perovskite under the 3D perovskite (3D/2D) is effective in improving the crystallinity of 3D perovskite. 2D/3D perovskite solar cells have 9.81 efficiency due to the improvement of surface defects and reduction of charge recombination. Besides, 2D/3D/2D perovskite solar cells by improving the crystallinity of 3D perovskite and the double protection of 3D perovskite by 2D perovskite, maintained 98% of the initial efficiency for 240 days.
Keywords
Solar cells
2D/3D/2D perovskite
Phenyl trimethylammonium iodide
Stability
Subjects

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  • Receive Date 24 December 2023
  • Revise Date 20 March 2024
  • Accept Date 07 July 2024