Organic-inorganic perovskite structured compounds have recently emerged as attractive materials in the fields of photovoltaic due to their exciting optical properties and easy syntheses, as well as exceptional structural and optical tunability. This work presents a Dion-Jacobson two-dimensional (2D) perovskite using diammonium as the barrier molecule. We show that the diammonium barrier molecule is responsible for the perovskite layers' orientation supported by Hall Effect measurements, which results in a high efficiency solar cell for 2D perovskite without the need for additives or any additional treatment. The 2D perovskite cells achieved an efficiency of 15.6%, which was one of the highest reported for low-dimensional perovskite. Charge extraction, voltage decay, and charge collection efficiency measurements show the beneficial alignment of the 2D perovskites related to the selective contacts. Stability characterization shows that the stability for the 2D perovskite was enhanced compared with their 3D counterparts.
Bibliographical noteFunding Information:
We wish to acknowledge the Singapore National Research Foundation under the CREATE program: Nanomaterials for Energy and Energy-Water nexus and the Israel Science foundation NSFC-ISF Grant 2552/17. B.E.C. acknowledges the Israel Ministry of Infrastructure, Energy, and Water under the program for fellowships for Ph.D. students and the Rieger foundation fellowship for supporting her research.
© 2019 American Chemical Society.
- renewable energy
- solar cells
- stability of PSCs
- two-dimensional perovskite