Hydrothermal syntheses, crystal structures and photoluminescence properties of two lead-free perovskites

Organic-inorganic metal halide perovskite is an emerging class of semiconductors. In recent years, there have been many breakthrough applications of this material, especially in the field of light emitting diodes, thin film solar cells and radiation detection materials. Photovoltaic (PV) technology;...

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Main Author: Ong, Yan Shing
Other Authors: Zhang Qichun
Format: Final Year Project
Language:English
Published: 2019
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Online Access:http://hdl.handle.net/10356/78562
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-785622023-03-04T15:38:32Z Hydrothermal syntheses, crystal structures and photoluminescence properties of two lead-free perovskites Ong, Yan Shing Zhang Qichun School of Materials Science and Engineering DRNTU::Engineering::Materials Organic-inorganic metal halide perovskite is an emerging class of semiconductors. In recent years, there have been many breakthrough applications of this material, especially in the field of light emitting diodes, thin film solar cells and radiation detection materials. Photovoltaic (PV) technology; the conversion of solar energy to electricity directly have utilised hybrid halide perovskite solar cells (PSCs) and attaining a power conversion efficiency (PCE) of 3.8% back in 2009. Since then, it have improved tremendously to 22.1% in the past 8 years. [1] Perovskite nano-crystal scintillators used in radiation detection materials have shown superior traits compared to traditional bulk inorganic scintillators. [2] Lead halide perovskite also shows promises for lighting and display applications as its quantum dots (QDs) own colour‐tunable and narrow band emissions. [3] Perovskites have proven to be a compound with multiple constructive applications. However, lead is the major metal cation and 3D network corner-sharing for this group. Lead is a toxic element which will limit further applications as they are not only harmful to the environment, but to the human body as well. Therefore, there is a need for further research the possibilities of lead free halide perovskites to eliminate lead toxicity while retaining its unique characteristics. In this project, by introducing two multiimidazole molecules, tetrakis(imidazolyl)borate and tetrakis(N-imidazolemethylene)methane, as structure directing agents, two novel organic-inorganic hybrid bismuth-halide perovskites have been successfully prepared under hydrothermal conditions. The compounds were structural characterized by single-crystal X-ray diffractions, powder X-ray diffractions, infrared spectroscopy, thermolgravimetry measurement and ultraviolet-visible spectroscopy. What’s more, the photoluminescent properties of two compounds were studied. Bachelor of Engineering (Materials Engineering) 2019-06-21T08:35:39Z 2019-06-21T08:35:39Z 2019 Final Year Project (FYP) http://hdl.handle.net/10356/78562 en Nanyang Technological University 34 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Materials
spellingShingle DRNTU::Engineering::Materials
Ong, Yan Shing
Hydrothermal syntheses, crystal structures and photoluminescence properties of two lead-free perovskites
description Organic-inorganic metal halide perovskite is an emerging class of semiconductors. In recent years, there have been many breakthrough applications of this material, especially in the field of light emitting diodes, thin film solar cells and radiation detection materials. Photovoltaic (PV) technology; the conversion of solar energy to electricity directly have utilised hybrid halide perovskite solar cells (PSCs) and attaining a power conversion efficiency (PCE) of 3.8% back in 2009. Since then, it have improved tremendously to 22.1% in the past 8 years. [1] Perovskite nano-crystal scintillators used in radiation detection materials have shown superior traits compared to traditional bulk inorganic scintillators. [2] Lead halide perovskite also shows promises for lighting and display applications as its quantum dots (QDs) own colour‐tunable and narrow band emissions. [3] Perovskites have proven to be a compound with multiple constructive applications. However, lead is the major metal cation and 3D network corner-sharing for this group. Lead is a toxic element which will limit further applications as they are not only harmful to the environment, but to the human body as well. Therefore, there is a need for further research the possibilities of lead free halide perovskites to eliminate lead toxicity while retaining its unique characteristics. In this project, by introducing two multiimidazole molecules, tetrakis(imidazolyl)borate and tetrakis(N-imidazolemethylene)methane, as structure directing agents, two novel organic-inorganic hybrid bismuth-halide perovskites have been successfully prepared under hydrothermal conditions. The compounds were structural characterized by single-crystal X-ray diffractions, powder X-ray diffractions, infrared spectroscopy, thermolgravimetry measurement and ultraviolet-visible spectroscopy. What’s more, the photoluminescent properties of two compounds were studied.
author2 Zhang Qichun
author_facet Zhang Qichun
Ong, Yan Shing
format Final Year Project
author Ong, Yan Shing
author_sort Ong, Yan Shing
title Hydrothermal syntheses, crystal structures and photoluminescence properties of two lead-free perovskites
title_short Hydrothermal syntheses, crystal structures and photoluminescence properties of two lead-free perovskites
title_full Hydrothermal syntheses, crystal structures and photoluminescence properties of two lead-free perovskites
title_fullStr Hydrothermal syntheses, crystal structures and photoluminescence properties of two lead-free perovskites
title_full_unstemmed Hydrothermal syntheses, crystal structures and photoluminescence properties of two lead-free perovskites
title_sort hydrothermal syntheses, crystal structures and photoluminescence properties of two lead-free perovskites
publishDate 2019
url http://hdl.handle.net/10356/78562
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