Surface pressure-area isotherm, optical and electrical properties of P3HT/Nanoparticles thin films by modified langmuir-blodgett technique (IR)

Hybrid organic-inorganic nanocomposite materials have emerged as one of the most potential alternative candidate to silicon as future optoelectronic material due to their unique optical and electrical characteristics. However, current fabrication process involving synthesizing the pre-made nanoparti...

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Main Author:	Fatin Hana Naning@Zin
Format:	thesis
Language:	eng
Published:	2017
Subjects:	QC Physics
Online Access:	https://ir.upsi.edu.my/detailsg.php?det=340
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spelling	oai:ir.upsi.edu.my:3402020-02-27 Surface pressure-area isotherm, optical and electrical properties of P3HT/Nanoparticles thin films by modified langmuir-blodgett technique (IR) 2017 Fatin Hana Naning@Zin QC Physics Hybrid organic-inorganic nanocomposite materials have emerged as one of the most potential alternative candidate to silicon as future optoelectronic material due to their unique optical and electrical characteristics. However, current fabrication process involving synthesizing the pre-made nanoparticles inside the polymer matrices is tediously complex, costly and time consuming. In this research, two approaches in preparing nanocomposite thin films, in situ hybridization and ex situ hybridization, were studied and the results were compared. In situ hybridization, a novel method, where the nanoparticles were grown directly in the Poly(3-hexylthiophene) (P3HT) mixed with stearic acid layers by exposing the films to either H2S or H2Se gas. Ex situ hybridization were done by mixing pre-made CdS or CdSe quantum dots into P3HT solution. For both approaches, depositions of thin films on the solid substrate were done by employing modified Langmuir-Blodgett technique. Studies on Langmuir layer found that the film is very sensitive towards its environment where the amount of solutions, the weight percentage, and the subphase affecting the gas-liquid-solid transformation. Absorbance spectra show higher polymer crystallization for thin films exposed to H2S or H2Se gas. The peak shifting and depreciation of absorption intensity indicates the quantum confinement effect of nanoparticles formed. Photoluminescence intensity decreased with the increment of gas exposure time and quantum dots weight percentage. The current density-voltage measurement revealed open circuit voltage for in situ hybrid thin film nucleating CdS and CdSe is 0.56 V and 0.72 V respectively. Thin films fabricated by ex situ method possess lower Johnson noise than that of in situ. Overall, in situ hybridization has shown a better performance as compared to hybrid nanocomposite thin films fabricated using ex situ approach. These findings have given a promising future for gas exposure method to be further studied in the fabrication of hybrid organic-inorganic nanocomposite thin films for optoelectronics application. 2017 thesis https://ir.upsi.edu.my/detailsg.php?det=340 https://ir.upsi.edu.my/detailsg.php?det=340 text eng closedAccess Doctoral Universiti Pendidikan Sultan Idris Fakulti Sains dan Matematik N/A
institution	Universiti Pendidikan Sultan Idris
collection	UPSI Digital Repository
language	eng
topic	QC Physics
spellingShingle	QC Physics Fatin Hana Naning@Zin Surface pressure-area isotherm, optical and electrical properties of P3HT/Nanoparticles thin films by modified langmuir-blodgett technique (IR)
description	Hybrid organic-inorganic nanocomposite materials have emerged as one of the most potential alternative candidate to silicon as future optoelectronic material due to their unique optical and electrical characteristics. However, current fabrication process involving synthesizing the pre-made nanoparticles inside the polymer matrices is tediously complex, costly and time consuming. In this research, two approaches in preparing nanocomposite thin films, in situ hybridization and ex situ hybridization, were studied and the results were compared. In situ hybridization, a novel method, where the nanoparticles were grown directly in the Poly(3-hexylthiophene) (P3HT) mixed with stearic acid layers by exposing the films to either H2S or H2Se gas. Ex situ hybridization were done by mixing pre-made CdS or CdSe quantum dots into P3HT solution. For both approaches, depositions of thin films on the solid substrate were done by employing modified Langmuir-Blodgett technique. Studies on Langmuir layer found that the film is very sensitive towards its environment where the amount of solutions, the weight percentage, and the subphase affecting the gas-liquid-solid transformation. Absorbance spectra show higher polymer crystallization for thin films exposed to H2S or H2Se gas. The peak shifting and depreciation of absorption intensity indicates the quantum confinement effect of nanoparticles formed. Photoluminescence intensity decreased with the increment of gas exposure time and quantum dots weight percentage. The current density-voltage measurement revealed open circuit voltage for in situ hybrid thin film nucleating CdS and CdSe is 0.56 V and 0.72 V respectively. Thin films fabricated by ex situ method possess lower Johnson noise than that of in situ. Overall, in situ hybridization has shown a better performance as compared to hybrid nanocomposite thin films fabricated using ex situ approach. These findings have given a promising future for gas exposure method to be further studied in the fabrication of hybrid organic-inorganic nanocomposite thin films for optoelectronics application.
format	thesis
qualification_name
qualification_level	Doctorate
author	Fatin Hana Naning@Zin
author_facet	Fatin Hana Naning@Zin
author_sort	Fatin Hana Naning@Zin
title	Surface pressure-area isotherm, optical and electrical properties of P3HT/Nanoparticles thin films by modified langmuir-blodgett technique (IR)
title_short	Surface pressure-area isotherm, optical and electrical properties of P3HT/Nanoparticles thin films by modified langmuir-blodgett technique (IR)
title_full	Surface pressure-area isotherm, optical and electrical properties of P3HT/Nanoparticles thin films by modified langmuir-blodgett technique (IR)
title_fullStr	Surface pressure-area isotherm, optical and electrical properties of P3HT/Nanoparticles thin films by modified langmuir-blodgett technique (IR)
title_full_unstemmed	Surface pressure-area isotherm, optical and electrical properties of P3HT/Nanoparticles thin films by modified langmuir-blodgett technique (IR)
title_sort	surface pressure-area isotherm, optical and electrical properties of p3ht/nanoparticles thin films by modified langmuir-blodgett technique (ir)
granting_institution	Universiti Pendidikan Sultan Idris
granting_department	Fakulti Sains dan Matematik
publishDate	2017
url	https://ir.upsi.edu.my/detailsg.php?det=340
_version_	1747832875947917312

Surface pressure-area isotherm, optical and electrical properties of P3HT/Nanoparticles thin films by modified langmuir-blodgett technique (IR)

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