Metastable Dion-Jacobson 2D Structure Enables Efficient and Stable Perovskite Solar Cells
Nov. 25, 2021
In this work, we report a general design strategy to maximize hole transport across the bulky cationic organic layers in 2D perovskites by using a metastable Dion-Jacobson (DJ) 2D structure through tuning of hydrogen bonding configurations based on asymmetric organic molecules.
We maximized hole transport across the bulky organic interlayers of metastable DJ 2D perovskite via tuning orientational arrangement of asymmetric organic molecules.
Significance and Impact
Orientational tuning of asymmetric organic molecules provides a new design rule for controlling optoelectronic characteristics of perovskites. Metastable DJ 2D perovskite surface layer reduced the energy barrier for hole transport, leading to highly efficient and stable perovskite solar cells.
- Theory and optoelectronic measurements on the impact of orientational tuning of organic molecules on out-of-plane charge transport in 2D perovskites
- 2D perovskite growth kinetics affects orientational arrangement of asymmetric organic molecules
- Detailed spectroscopic, electrical, structural measurements to understand metastable DJ 2D perovskite