A Short Review on Interface Engineering of Perovskite Solar Cells: A Self-Assembled Monolayer and Its Roles

摘要

Perovskite solar cells (PSCs) are considered as potential candidates for nextgenerationenergy harvesting due to their advantages. A classic PSC has twocharge transport layers (CTLs) above and below a perovskite layer, and theseCTLs largely influence charge extraction and transport. Thus, an interfaceinevitably forms between the CTL and perovskite layer, and if the CTL andperovskite do not form a compact contact, these interfaces can become anonradiative recombination center, which can degrade device efficiency andstability. Accordingly, interface engineering is considered an effective way toalleviate this issue. Herein, an overview of interface engineering methods onPSCs is provided, particularly with regard to types of self-assembled monolayersand their roles in device energy level alignment and passivation effects.