Abstract
The performance of three-dimensional (3D) organic-inorganic halide perovskite solar cells (PSCs) can be enhanced through surface treatment with 2D layered perovskites that have efficient charge transport. We maximized hole transport across the layers of a metastable Dion-Jacobson (DJ) 2D perovskite that tuned the orientational arrangements of asymmetric bulky organic molecules. The reduced energy barrier for hole transport increased out-of-plane transport rates by a factor of 4 to 5, and the power conversion efficiency (PCE) for the 2D PSC was 4.9%. With the metastable DJ 2D surface layer, the PCE of three common 3D PSCs was enhanced by approximately 12 to 16% and could reach approximately 24.7%. For a triple-cation–mixed-halide PSC, 90% of the initial PCE was retained after 1000 hours of 1-sun operation at ~40°C in nitrogen.
Original language | American English |
---|---|
Pages (from-to) | 71-76 |
Number of pages | 6 |
Journal | Science |
Volume | 375 |
Issue number | 6576 |
DOIs | |
State | Published - 7 Jan 2022 |
Bibliographical note
Publisher Copyright:© 2022 American Association for the Advancement of Science. All rights reserved.
NREL Publication Number
- NREL/JA-5900-79906
Keywords
- 2D
- hydrogen bonding
- metastable
- perovskite