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Updated: Jan 5, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
Electronic structure of MAPbI3 and MAPbCl3: importance of band alignment
Marco Caputo1, Nicola Cefarin2,3, Andrea Radivo4,2
1Elettra - Sincrotrone Trieste, s.s. 14 Km 163.5 in Area Science Park, Basovizza (Trieste) 34149, Trieste, Italy. marco.caputo@psi.ch.
Abstract:
Since their first appearance, organic-inorganic perovskite absorbers have been capturing the attention of the scientific community. While high efficiency devices highlight the importance of band level alignment, very little is known on the origin of the strong n-doping character observed in the perovskite. Here, by means of a highly accurate photoemission study, we shed light on the energy alignment in perovskite-based devices. Our results suggest that the interaction with the substrate may be the driver for the observed doping in the perovskite samples.
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