Secondary ion mass spectrometry study of organic and inorganic interfaces in methylammonium lead triiodide solar cells

Abstract

This study focuses on investigating interfaces in perovskite solar cells (PSCs) fabricated by using two different deposition methods. One structure involves all-solution processing, with the photoactive layer spin-coated, and organic semiconductors for the hole and electron transporting layers (HTL and ETL). The other structure incorporates inorganic HTL and ETL layers deposited via magnetron sputtering. We analyze the interfaces using TOF-SIMS and SEM, comparing the two manufacturing approaches to understand their impact on interface quality. Additionally, we explore how different humidity levels during fabrication influence solar cell performance. This research aims to advance the understanding of the correlation between interface quality and the performance of perovskite solar cells.