Dimensional Mixing Increases the Efficiency of 2D/3D Perovskite Solar Cells
Sam Teale, Andrew H. Proppe, Eui Hyuk Jung, Andrew Johnston, Darshan H. Parmar, Bin Chen, Yi Hou, Shana O. Kelley, Edward H. Sargent
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.
Topics & Concepts
Perovskite (structure)HeterojunctionMixing (physics)Materials scienceLayer (electronics)OptoelectronicsTrap (plumbing)NanotechnologyChemistryPhysicsCrystallographyQuantum mechanicsMeteorologyPerovskite Materials and ApplicationsConducting polymers and applicationsOrganic Electronics and Photovoltaics