jz0c01444_si_001.pdf (1019.58 kB)
Dimensional Mixing Increases the Efficiency of 2D/3D Perovskite Solar Cells
journal contribution
posted on 2020-06-17, 20:12 authored by Sam Teale, Andrew H. Proppe, Eui Hyuk Jung, Andrew Johnston, Darshan H. Parmar, Bin Chen, Yi Hou, Shana O. Kelley, Edward H. Sargent2D/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.