Tuning the electron beam evaporation parameters for the production of hole and electron transport layers for perovskite solar cells

Download

index.pdf

Date

2019

Author

Coşar, Mustafa Bura

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

252
views

156
downloads

This study evaluates the use of electron beam evaporation technique for the deposition of electron and hole transport layers for perovskite solar cells where cell productions were performed in n-i-p structure. NiO and TiO layers were studied for hole transport layer and TiO2 and Nb2O5 layers were deposited for electron transport purposes. To optimize the suitable evaporation parameters for efficient perovskite cell production, single layers of each material were deposited at different conditions of oxygen flow rate, deposition temperature, deposition rate and plasma assistance. The structural, optical, and electrical properties of each layer were associated with the produced perovskite cells. Oxygen addition provides better cell performances in the case of both NiO and TiO hole transport layers; however, oxygen requirement of the TiO thin films were optimized at a lower value than NiO layers. When hole transport layer thicknesses were obtained at 75 nm and 50 nm for NiO and TiO, conversion efficiencies for these cells were recorded as best performances of 6.13 % and 5.72 %. Nb2O5 compact electron transport layers were used in the production of the perovskite solar cells at planar, heat treated planar and Nb2O5- mesoporous TiO2 bilayer architectures. Although, oxygen addition is crucial for the plasma assisted condition, it is detrimental for the unassisted condition for all types of architectures. It is detected that plasma assistance yields better performance compared to unassisted deposition. The use of Nb2O5-mesoporous TiO2 bilayer provides sharp enhancement in the cell performance and 13.87 % conversion efficiency was sustained.

Subject Keywords

Solar cells, Solar cells Design and construction., Electron Beam Evaporation, Perovskite Solar Cell, Compact Electron Transport Layer, Hole Transport Layer.

URI

http://etd.lib.metu.edu.tr/upload/12623384/index.pdf
https://hdl.handle.net/11511/43816

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Investigation of physical properties of quaternary AgGa0.5In0.5Te2 thin films deposited by thermal evaporation Karaagac, H.; Parlak, Mehmet (Elsevier BV, 2010-8) The aim of this study is to understand the structural, optical and photo-electrical properties of the quaternary chalcogenide AgGa 0.5In0.5Te2 thin films deposited onto the glass substrates by thermal evaporation of the single crystalline powder. Energy dispersive X-ray analysis (EDXA) showed remarkable change in atomic percentage of the constituent elements after annealing. The X-ray diffraction (XRD) of the films below the annealing temperature of 300°C indicated the polycrystalline structure with co-exis...
Application of Si Nanowires Fabricated by Metal-Assisted Etching to Crystalline Si Solar Cells KULAKCI, Mustafa; ES, FIRAT; ÖZDEMİR, Baris; Ünalan, Hüsnü Emrah; Turan, Raşit (2013-01-01) Reflection and transmission through a solar cell can be significantly reduced using light-trapping structures. This approach can be applied to both crystalline and thin-film solar cells to improve the light absorption and conversion efficiency of the cell. In this study, vertically aligned Si nanowires were fabricated over a large area via a metal-assisted etching technique. Following a detailed parametric study, nanowires were applied to industrial-size (156 mm x 156 mm) Si solar cells. The reflectivity fr...
Studies on device properties of an n-AgIn5Se8/p-Si heterojunction diode KALELİ, Murat; Parlak, Mehmet; Ercelebi, C. (2011-10-12) In this study, polycrystalline thin films of ternary AgIn5Se8 compounds with n-type conductivity were deposited on p-type Si substrates from the powder of a Ag3In5Se9 single crystal by a thermal evaporation technique. Transport and photo-transport properties of the In/n-AgIn5Se8/p-Si/Al sandwich structure were investigated by analyzing temperature-dependent dc current-voltage (I-V), and photo-response measurements carried out in the temperature range of 200-360 K. In order to obtain the series resistance (R...
A triazoloquinoxaline and benzodithiophene bearing low band gap copolymer for electrochromic and organic photovoltaic applications HACIOGLU, Serife O.; UNLU, Naime A.; AKTAS, Ece; HIZALAN, Gonul; Yildiz, Esra D.; Çırpan, Ali; Toppare, Levent Kamil (2017-06-01) A new triazoloquinoxaline and benzodithiophene based copolymer was synthesized to investigate its electro-chemical, optical and photovoltaic behaviors. According to the polymer design, combination of two acceptor units (benzotriazole and quinoxaline) which contribute imine bonds to the structure and a triazoloquinoxaline unit for enhancing electron accepting ability was pursued. As a result of electrochemical studies, the copolymer PTQBDT has a low lying HOMO energy level as - 5.23 eV which increases the ch...
Production of core-shell type conducting FTO/TiO2 photoanode for dye sensitized solar cells Icli, Kerem Cagatay; Yavuz, Halil Ibrahim; Özenbaş, Ahmet Macit (2014-02-01) Core-shell type photoanode composed of electrically conducting fluorine doped tin dioxide (FTO) matrix and TiO2 shell layer was prepared and applied in dye sensitized solar cells. Effects of fluorine doping on tin dioxide based cells and precursor material on shell layer were investigated. Fluorine doped tin dioxide nanoparticles were synthesized under hydrothermal conditions and resistivity value down to 17 Omega cm was achieved. Cells constructed from FTO nanoparticles show enhanced performance compared t...

Citation Formats

M. B. Coşar, “Tuning the electron beam evaporation parameters for the production of hole and electron transport layers for perovskite solar cells,” Thesis (Ph.D.) -- Graduate School of Natural and Applied Sciences. Metallurgical and Materials Engineering., Middle East Technical University, 2019.