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Stabilization of methylammonium lead iodide via SiO2 coating for photodetectors
Journal article   Peer reviewed

Stabilization of methylammonium lead iodide via SiO2 coating for photodetectors

Hunter Ye, Hao Jing, Wan Y. Shih and Wei-Heng Shih
Journal of materials research
08 Mar 2023
DOI: https://doi.org/10.1557/s43578-023-00928-8
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

Materials Science, Multidisciplinary Science & Technology Materials Science Technology
Organohalide perovskite nanocrystals (OHPNCs) and their wide range of optoelectronic applications have attracted much interest due to their unparalleled photoluminescent intensity and quantum efficiency. Furthermore, their band gap is tunable over the visible and near-infrared wavelengths through changes in composition, shape, or size. However, OHPNCs are unstable under ambient conditions due to their high reactivities with moisture and gases. In this work, the stability of methylammonium lead iodide (MAPbI(3)) perovskite suspension and dried films against heat and water was enhanced through the addition of tetraethyl orthosilicate (TEOS). With the SiO2 coating, the photoluminescence (PL) of MAPbI(3) nanocrystals increased by 30% and the MAPbI(3) films were stable in ambient environment for several weeks. The enhancement of stability can be further improved by adding the TEOS in steps and increasing the time interval between the steps. Furthermore, the silica-coated MAPbI(3) perovskite nanocrystals were made into photodetectors demonstrating their practical applications in ambient condition.

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4 citations in Web of Science
2 citations in Scopus

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UN Sustainable Development Goals (SDGs)

This publication has contributed to the advancement of the following goals:

#7 Affordable and Clean Energy

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Web of Science research areas
Materials Science, Multidisciplinary
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