Boosting Efficiency in Carbon Nanotube-Integrated Perovskite Photovoltaics
Mustafa K. A. Mohammed
Abstract
Carbon nanomaterials (graphene, carbon nanotubes, and graphene oxide) have potential applications for optoelectronics, thanks to their superior electronic and optical characteristics. The remarkable stability of carbon-based perovskite solar cells (PSCs) has attracted significant attention. Herein, a fluorine-doped carbon nanotube (F-CNT) is incorporated into the PSCs as a hole-transporting layer (HTL) in between methylammonium lead iodide (MAPbI 3 ) and the rear electrode to develop an effective MAPbI 3 /HTL interface. The F-CNT bridges both the MAPbI 3 film and the Au electrode and promotes photocarrier extraction and transportation between the two layers. The article presents a simulation-driven optimization approach for the development of efficient CNT-based PSCs. Many factors, such as the total defect density of the perovskite, the shallow acceptor density of the F-CNTs film thickness, the perovskite thickness, parasitic resistances, and temperature, have been studied using SCAPS-1D simulations. Utilizing the photovoltaic software SCAPS-1D, we simulated defect states and interfaces to approximate a realistic perovskite device in our analyses. The CNT-based PSC with an architecture of FTO/TiO 2 /MAPbI 3 /F-CNTs/Au achieved an outstanding power conversion efficiency (PCE) of 26.91%, with a fill factor (FF) of 84.23%.