Abstract
2D/3D heterojunction perovskite solar cells have demonstrated superior efficiency and stability compared to their fully 3D counterparts. Previous studies have focused on producing 2D layers containing predominantly n = 1 perovskite quantum wells. In this report we demonstrate a technique to introduce dimensional mixing into the 2D layer, and we show that this leads to more efficient devices relative to controls. Simulations suggest that the improvements are due to a reduction in trap state density and superior band alignment between the 3D/2D perovskite and the hole-transporting layer.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 5115-5119 |
| Number of pages | 5 |
| Journal | Journal of Physical Chemistry Letters |
| Volume | 11 |
| Issue number | 13 |
| DOIs | |
| State | Published - Jul 2 2020 |
Funding
This work was supported in part by the U.S. Department of the Navy, Office of Naval Research (Grant Award No. N00014-17-1-2524). The authors thank the Canadian Light Source (CLS) for support in the form of a travel grant. GIWAXS patterns were collected at the HXMA Beamline at the CLS with the assistance of Dr. Chang-Yong Kim and Dr. Adam Leontowich. The CLS is funded by NSERC, the Canadian Institutes of Health Research, Canada Foundation for Innovation, the Government of Saskatchewan, Western Economic Diversification Canada, and the University of Saskatchewan.
ASJC Scopus subject areas
- General Materials Science
- Physical and Theoretical Chemistry