Engineering electronic and optical properties of perovskites for light emission and solar cell applications

2D Hybrid Organic Inorganic Perovskites (HOIPs) have gained popularity in the scientific community for their optoelectronic properties, stability and performance. 2D perovskites also possess novel qualities that may be exploited due to the removal of the constraints on the dimensions of the A-site s...

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Main Author: Gayathri, Girish
Other Authors: Shen Zexiang
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2024
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Online Access:https://hdl.handle.net/10356/178801
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1788012024-07-08T15:36:09Z Engineering electronic and optical properties of perovskites for light emission and solar cell applications Gayathri, Girish Shen Zexiang School of Physical and Mathematical Sciences zexiang@ntu.edu.sg Physics 2-dimensional hybrid organic-inorganic metal halide perovskites Raman Spectroscopy Photoluminescence spectroscopy Phase transitions Cross-linking 2D Hybrid Organic Inorganic Perovskites (HOIPs) have gained popularity in the scientific community for their optoelectronic properties, stability and performance. 2D perovskites also possess novel qualities that may be exploited due to the removal of the constraints on the dimensions of the A-site spacer cation. Organic ligands with long carbon chains, diene groups and carboxylic acids may be used to amplify optoelectronic properties by means of topochemical polymerization via pressure [1]. Crosslinking between organic layers of perovskite have been associated with increased stability, lattice rigidity and enhanced carrier mobility. We investigate the properties of a novel compound (EtODA)2 PbBr4 under pressure with the objective of introducing cross-linking through topochemical polymerisation. (EtODA)2 PbBr4 is compared with poly-(EtODA)2 PbBr4 and characterised through Raman spectroscopy and photoluminescence spectroscopy. The organic moiety of (EtODA)2 PbBr4 has undergone irreversible phase transitioning with application of pressure, as made evident by the 785 nm Raman spectra. Additionally, multiple phase transitions at ~4 GPa and ~10GPa are observed in the inorganic lattice as characterised by the observations from Raman spectroscopy (532 nm and 633 nm) and photoluminescence spectroscopy. Polymerised (EtODA)2 PbBr4 is more resilient under pressure and does not undergo any phase changes with application of moderate pressure. Bachelor's degree 2024-07-08T01:15:53Z 2024-07-08T01:15:53Z 2024 Final Year Project (FYP) Gayathri, G. (2024). Engineering electronic and optical properties of perovskites for light emission and solar cell applications. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/178801 https://hdl.handle.net/10356/178801 en application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Physics
2-dimensional hybrid organic-inorganic metal halide perovskites
Raman Spectroscopy
Photoluminescence spectroscopy
Phase transitions
Cross-linking
spellingShingle Physics
2-dimensional hybrid organic-inorganic metal halide perovskites
Raman Spectroscopy
Photoluminescence spectroscopy
Phase transitions
Cross-linking
Gayathri, Girish
Engineering electronic and optical properties of perovskites for light emission and solar cell applications
description 2D Hybrid Organic Inorganic Perovskites (HOIPs) have gained popularity in the scientific community for their optoelectronic properties, stability and performance. 2D perovskites also possess novel qualities that may be exploited due to the removal of the constraints on the dimensions of the A-site spacer cation. Organic ligands with long carbon chains, diene groups and carboxylic acids may be used to amplify optoelectronic properties by means of topochemical polymerization via pressure [1]. Crosslinking between organic layers of perovskite have been associated with increased stability, lattice rigidity and enhanced carrier mobility. We investigate the properties of a novel compound (EtODA)2 PbBr4 under pressure with the objective of introducing cross-linking through topochemical polymerisation. (EtODA)2 PbBr4 is compared with poly-(EtODA)2 PbBr4 and characterised through Raman spectroscopy and photoluminescence spectroscopy. The organic moiety of (EtODA)2 PbBr4 has undergone irreversible phase transitioning with application of pressure, as made evident by the 785 nm Raman spectra. Additionally, multiple phase transitions at ~4 GPa and ~10GPa are observed in the inorganic lattice as characterised by the observations from Raman spectroscopy (532 nm and 633 nm) and photoluminescence spectroscopy. Polymerised (EtODA)2 PbBr4 is more resilient under pressure and does not undergo any phase changes with application of moderate pressure.
author2 Shen Zexiang
author_facet Shen Zexiang
Gayathri, Girish
format Final Year Project
author Gayathri, Girish
author_sort Gayathri, Girish
title Engineering electronic and optical properties of perovskites for light emission and solar cell applications
title_short Engineering electronic and optical properties of perovskites for light emission and solar cell applications
title_full Engineering electronic and optical properties of perovskites for light emission and solar cell applications
title_fullStr Engineering electronic and optical properties of perovskites for light emission and solar cell applications
title_full_unstemmed Engineering electronic and optical properties of perovskites for light emission and solar cell applications
title_sort engineering electronic and optical properties of perovskites for light emission and solar cell applications
publisher Nanyang Technological University
publishDate 2024
url https://hdl.handle.net/10356/178801
_version_ 1806059776385220608