Atomic Scale Investigation of the CuPc–MAPbX<sub>3</sub> Interface and the Effect of Non-Stoichiometric Perovskite Films on Interfacial Structures
Collin Stecker, Zhenyu Liu, Jérémy Hieulle, Siming Zhang, Luis K. Ono, Guofeng Wang, Yabing Qi
Abstract
(X = I,Br) forms a self-assembled layer consistent with the α-polymorph of CuPc. Additionally, STM images show a distinctly different adsorption orientation for CuPc on non-perovskite domains of the thin film samples. These findings highlight the effect of non-stoichiometric films on the relative orientation at the MHP/HTL interface, which may affect interfacial charge transport in a device. Our work provides an atomic scale view of the MHP/CuPc interface and underscores the importance of understanding interfacial structures and the effect that the film stoichiometry can have on interfacial properties.
Topics & Concepts
Perovskite (structure)Materials scienceStoichiometryLayer (electronics)Thin filmChemical physicsHalideAtomic unitsDensity functional theoryScanning tunneling microscopePhthalocyanineNanotechnologyCrystallographyPhysical chemistryComputational chemistryChemistryInorganic chemistryQuantum mechanicsPhysicsPerovskite Materials and ApplicationsQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films