Preparation and characterization of CH3 NH3 PbI3 fimls for perovskite solar cells by a sequentially chemical sprayed nebulous deposition method

Name: Nakorn Henjongchom

LCSH: Kasetsart University -- Theses. M.S. (Nanomaterials Science) 2018

Classification :.LCCS: TK2963.P47

LCSH: Kasetsart University. -- Department of Nanomaterials Science -- Theses

LCSH: Perovskite solar cells

LCSH: Perovskite

LCSH: Solar cells

Abstract: In recent years, methyl ammonium lead iodine CH3NH3PbI3 perovskite film is of great interest for optoelectronic and photovoltaic applications. Several deposition methods for perovskite film fabrication have been applied. In this thesis work, a new approach of ultrasonically sprayed-nebulous deposition has been introduced for preparing a layer of polycrystalline CH3NH3PbI3 on fluorine doped tin oxide (FTO) coated on glass. Two Different inorganic lead sources of PbI2 and Pb(NO3)2 were used as a lead precursor. A layer of perovskite was prepared by spraying nebulized form of the lead precursor, followed by spraying CH3NH3I (MAI) aerosols. Formation of the perovskite CH3NH3PbI3 structure was occurred when the lead compound was brought into contact with the aerosols of MAI with the optimal condition. Changes in the morphological, structural and optical properties along with photo-induced charge separation and transportation behaviors upon the perovskite phase evolution were studied. The XRD results reveal a strong splitting of the CH3NH3PbI3 diffraction peaks, indicating a complete perovskite formation with tetragonal structure. The optical band gap of the films obtained from absorbance spectra was found to be 1.588 eV. The values of Urbach energy (Eu) decrease from 33.36 to 28.24 meV as the amount of organic content is increased to the optimum condition, suggesting a reduction of the distributed tail states. The SPV spectra reveal a significant reduction of the deep defect states along with the perovskite phase transformation. We present that the ultrasonically sprayed-aerosols deposition technique has a potential for fabricating layer of CH3NH3PbI3 perovskite having high crystallinity and low degree of disorder.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Thidarat Supasai

Role: Thesis Advisor

Created: 2018

Modified: 2025-07-09

Issued: 2025-07-09

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2561/nakorn-hen-all.pdf

CallNumber: TK2963.P47 .N34

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Nanomaterials Science

Grantor: Kasetsart University

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