Sequential Co‐Deposition of Perovskite Film: An Effective Way of Tailoring Bandgap in All Vacuum Processed Perovskite Solar Cells
Source abstract
Abstract
Abstract This study introduces a simple and effective way to control the bandgap of perovskite film by constructing bilayer film composed of methylammonium lead iodide (MAPbI 3 ) and formamidinium lead iodide (FAPbI 3 ) layers. The bilayer film is fabricated through the sequential co‐deposition of methylammonium iodide (MAI) and lead iodide (PbI 2 ), followed by formamidinium iodide (FAI) and PbI 2 . Interestingly, the bandgap of the bilayer film can be tuned from 1.60 to 1.51 eV by adjusting the thickness of each layer. X‐ray photoelectron spectroscopy (XPS) indicates that the highly diffusive methylammonium ions (MA + ) enables the formation of stable α‐phase with formamidinium ions (FA + ) in the bilayer perovskite film even without further thermal annealing. Bilayer film‐based perovskite solar cells (PSCs) are fabricated through an all‐vacuum deposition process. The bilayer PSC exhibits higher power conversion efficiency (PCE) of 17.0% compared to the single‐layer PSC based on MAPbI 3 or FAPbI 3 .
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry and Nano Science Ewha Womans University Seoul 03760 Republic of Korea
Department of Materials Science and Engineering Seoul National University Seoul 08826 Republic of Korea
Solar Energy Research Institute Universiti Kebangsaan Malaysia Bangi Selangor 43600 Malaysia
Research Institute of Advanced Materials Seoul National University Seoul 08826 Republic of Korea
Funding
National Research Foundation of Korea · Korea Institute of Energy Technology Evaluation and Planning
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