Fabrication and characterization of hybrid perovskite thin films for solar cell application

Perovskite solar cells (PSCs) are one of the most promising photovoltaic technology in recent years, owing to the remarkable properties of perovskite such as high defect tolerance, long charge carrier lifetime, high absorption coefficient, etc. However, several bottlenecks are preventing this techno...

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Main Author: Chen, Qing Hong
Other Authors: Andrew Clive Grimsdale
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2020
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Online Access:https://hdl.handle.net/10356/139268
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spelling sg-ntu-dr.10356-1392682023-03-04T15:48:25Z Fabrication and characterization of hybrid perovskite thin films for solar cell application Chen, Qing Hong Andrew Clive Grimsdale School of Materials Science and Engineering Energy Research Institute @NTU ACGrimsdale@ntu.edu.sg Engineering::Materials Perovskite solar cells (PSCs) are one of the most promising photovoltaic technology in recent years, owing to the remarkable properties of perovskite such as high defect tolerance, long charge carrier lifetime, high absorption coefficient, etc. However, several bottlenecks are preventing this technology from being commercialised, which mainly concerns its long-term stability in outdoor environment. Defects present in the perovskite hinders the full potential of perovskite as an absorber in solar cell, and may accelerate certain degradations to occur. Passivation through additives has been shown to be a cheap and convenient way to eliminate or minimise defects. As such, we propose the use of triphenylphosphine sulphide (TPPS) as a passivating agent, which was introduced into perovskite through a novel method — as an additive in antisolvent. Results show that by modifying the perovskite with 1 mg/mL of TPPS, it shows the most improvement in terms of performance, where power conversion efficiency has on average increased by 7.55 % as compared to pristine devices, with the champion device having an efficiency of 14.8 %. Photoluminescence results proved that by incorporating TPPS into perovskite, less quenching occurs, which is an indication that trap states were successfully passivated. TPPS passivation may potentially aid in moisture and storage stability, yet test results were not fully indicative, thus more tests will be required. Although the mechanism behind TPPS passivation is yet fully understood, using it to passivate defects and improve the performance of PSCs seems promising. Bachelor of Engineering (Materials Engineering) 2020-05-18T07:41:24Z 2020-05-18T07:41:24Z 2020 Final Year Project (FYP) https://hdl.handle.net/10356/139268 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 Engineering::Materials
spellingShingle Engineering::Materials
Chen, Qing Hong
Fabrication and characterization of hybrid perovskite thin films for solar cell application
description Perovskite solar cells (PSCs) are one of the most promising photovoltaic technology in recent years, owing to the remarkable properties of perovskite such as high defect tolerance, long charge carrier lifetime, high absorption coefficient, etc. However, several bottlenecks are preventing this technology from being commercialised, which mainly concerns its long-term stability in outdoor environment. Defects present in the perovskite hinders the full potential of perovskite as an absorber in solar cell, and may accelerate certain degradations to occur. Passivation through additives has been shown to be a cheap and convenient way to eliminate or minimise defects. As such, we propose the use of triphenylphosphine sulphide (TPPS) as a passivating agent, which was introduced into perovskite through a novel method — as an additive in antisolvent. Results show that by modifying the perovskite with 1 mg/mL of TPPS, it shows the most improvement in terms of performance, where power conversion efficiency has on average increased by 7.55 % as compared to pristine devices, with the champion device having an efficiency of 14.8 %. Photoluminescence results proved that by incorporating TPPS into perovskite, less quenching occurs, which is an indication that trap states were successfully passivated. TPPS passivation may potentially aid in moisture and storage stability, yet test results were not fully indicative, thus more tests will be required. Although the mechanism behind TPPS passivation is yet fully understood, using it to passivate defects and improve the performance of PSCs seems promising.
author2 Andrew Clive Grimsdale
author_facet Andrew Clive Grimsdale
Chen, Qing Hong
format Final Year Project
author Chen, Qing Hong
author_sort Chen, Qing Hong
title Fabrication and characterization of hybrid perovskite thin films for solar cell application
title_short Fabrication and characterization of hybrid perovskite thin films for solar cell application
title_full Fabrication and characterization of hybrid perovskite thin films for solar cell application
title_fullStr Fabrication and characterization of hybrid perovskite thin films for solar cell application
title_full_unstemmed Fabrication and characterization of hybrid perovskite thin films for solar cell application
title_sort fabrication and characterization of hybrid perovskite thin films for solar cell application
publisher Nanyang Technological University
publishDate 2020
url https://hdl.handle.net/10356/139268
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