A New Organic Interlayer Spacer for Stable and Efficient 2D Ruddlesden-Popper Perovskite Solar Cells

Nano Letters
Zhimin LiGang Chen

Abstract

Two-dimensional (2D) perovskite materials have exhibited great possibilities toward the fabrication of highly efficient and stable solar cell devices. The large degree of structural versatility due to the viable choices of organic interlayer spacers promises new and valuable 2D perovskite species. Herein, phenyltrimethylammonium (PTA+) is successfully employed as the organic interlayer spacer to prepare the 2D Ruddlesden-Popper perovskite films that exhibit exceptional optoelectronic properties. By adding Cl- ions during film growth, the (PTA)2(MA)3Pb4I13 (MA = methylammonium) perovskite films are effectively prepared with a tunable crystal orientation and film morphology. The optimized devices fabricated with the assistance of Cl- ions deliver the power conversion efficiency up to 11.53%, which is ascribed to the simultaneous reductions of charge transfer resistance and defect-induced charge recombination. Moreover, the PTA-based 2D perovskite solar cells demonstrate remarkable environmental and thermal stabilities.

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Citations

Nov 5, 2020·Journal of the American Chemical Society·Jun XiZhaoxin Wu
Sep 18, 2020·The Journal of Physical Chemistry Letters·Lin ZhuNana Wang
Sep 15, 2021·ACS Applied Materials & Interfaces·Han LiSefaattin Tongay

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