Reducing the V_oc Loss of Hole Transport Layer-Free Carbon-Based Perovskite Solar Cells via Dual Interfacial Passivation.

ABSTRACT: The hole transport layer (HTL)-free carbon-based perovskite solar cells (C-PSCs) are promising for commercialization owing to their excellent operational stability and simple fabrication process. However, the power conversion efficiencies (PCE) of C-PSCs are inferior to the metal electrode-based devices due to their open-circuit voltage (V_oc) loss. Herein, time-resolved confocal photoluminescence microscopy reveals that grain boundary defects at the perovskite/carbon interface are very likely to function as nonradiative recombination centers in HTL-free C-PSCs. A versatile additive Li₂CO₃ is used to modify the conformal tin oxide electron transport layer for HTL-free C-PSCs. Li₂CO₃ modification can result in enhanced charge extraction

SUBMITTER: Zhang X 

PROVIDER: S-EPMC12089553 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature