Natural methionine-passivated MAPbI3 perovskite films for efficient and stable solar devices
Source abstract
Abstract
Defects located at the surfaces and grain boundaries of solution-processed perovskite films serve as nonradiative recombination centers and are detrimental for the photovoltaic performance of solar devices. Herein, a natural amino acid molecule methionine (Met) is selected as an effective passivation agent to enhance the optoelectronic properties of methylammonium lead iodide (MAPbI3) films. The incorporation of a small amount of Met significantly reduces the trap-state density, contributing to longer carrier lifetime of the perovskite films. As a result, solar cells made of Met-mediated perovskite films deliver a high photovoltage of 1.145 V, which is up to 100 mV higher than the control device. In addition, the Met-mediated device exhibits enhanced stability due to the reduced trap states and the improved hydrophobic property of the modified perovskite film, which retains ~ 85% of their initial efficiency after 480-h storage. The effective methionine passivation is reported, which significantly reduces the trap-state density and leads to longer carrier lifetime of the perovskite films. Methionine-mediated device produces a champion efficiency of 20.13%, with enhanced moisture stability.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Perovskite Materials and Applications · 2D Materials and Applications · Solid-state spectroscopy and crystallography
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (42)
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