Thesis (Ph.D.)--University of Wollongong, 2009. / Typescript. Includes bibliographical references: leaf 174-191.

Thesis (Ph. D.)--University of Texas at Austin, 2006. / Vita. Includes bibliographical references.

published_or_final_version / Physics / Master / Master of Philosophy

No description available.

No description available.

by Chan Ying. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2001. / Includes bibliographical references. / Abstracts in English and Chinese. / Abstract --- p.i / 摘要 --- p.iii / Acknowledgements --- p.iv / Table of contents --- p.v / List of Tables --- p.ix / List of Figures --- p.xii / Chapter Chapter 1 --- Introduction / Chapter 1.1 --- Introduction --- p.1 / Chapter 1.2 --- Literature review of the ODE reaction over different catalysts --- p.4 / Chapter 1.2.1 --- The alkali metal and the alkaline earth metal oxide catalysts --- p.4 / Chapter 1.2.2 --- Rare earth oxide catalysts --- p.5 / Chapter 1.2.3 --- Transition metal oxide catalysts --- p.6 / Chapter 1.3 --- Perovskite-type oxide catalysts --- p.7 / Chapter 1.3.1 --- The structure of perovskites oxide --- p.7 / Chapter 1.3.2 --- Preparation method of perovskites oxide --- p.8 / Chapter 1.3.3 --- Literature review of perovskites oxide catalysts --- p.9 / Chapter 1.4 --- ODE mechanism --- p.11 / Chapter 1.5 --- Factors affecting the catalytic performance of catalysts --- p.12 / Chapter 1.6 --- surface and bulk characterization of perovskites-type oxide catalysts --- p.13 / Chapter 1.7 --- Objective of this research project --- p.15 / Reference --- p.15 / Chapter Chapter 2 --- Instrumentation / Chapter 2.1 --- Introduction --- p.20 / Chapter 2.2 --- Assessment catalytic performance --- p.20 / Chapter 2.3 --- "Brunauer, Emmett and Teller (BET)" --- p.23 / Chapter 2.3.1 --- Theory --- p.23 / Chapter 2.3.2 --- Experimental --- p.25 / Chapter 2.4 --- X-ray Diffraction (XRD) --- p.25 / Chapter 2.4.1 --- Theory --- p.25 / Chapter 2.4.2 --- Instrumentation --- p.26 / Chapter 2.5 --- X-ray Photoelectron Spectroscopy (XPS) --- p.28 / Chapter 2.5.1 --- Basic principles --- p.28 / Chapter 2.5.2 --- Qualitative analysis --- p.29 / Chapter 2.5.2.1. --- Chemical shift peaks --- p.29 / Chapter 2.5.2.2. --- Auger peaks --- p.30 / Chapter 2.5.2.3. --- Shake-up satellites --- p.30 / Chapter 2.5.3 --- Quantitative analysis --- p.31 / Chapter 2.5.3.1 --- Surface sensitivity and sampling depth --- p.31 / Chapter 2.5.3.2 --- Atomic concentration determination --- p.31 / Chapter 2.5.4. --- Instrumentation --- p.32 / Chapter 2.5.4.1 --- Ultra-high Vacuum --- p.32 / Chapter 2.5.4.2 --- Sample Introduction System --- p.33 / Chapter 2.5.4.3 --- X-ray Source --- p.33 / Chapter 2.5.4.4 --- Data processing --- p.34 / Chapter 2.6 --- O2-Temperature Programmed Desorption (02-TPD) --- p.37 / Chapter 2.7. --- Halogen Analysis --- p.37 / Chapter 2.7.1 --- The Determination of Chloride by Fajans Method --- p.37 / Chapter 2.7.2. --- The Determination of Fluoride Content by ISE Fluoride Electrode --- p.38 / Chapter 2.8. --- The Determination of Mn Concentration --- p.38 / Reference --- p.39

In order to limit global warming to 1.5-2 °C deployed solar photovoltaic (PV) power must increase from today's 0.228 terawatts to 2-10 terawatts installed by 2030, depending on demand. These goals require increasing manufacturing capacity, which, in turn, requires lowering the cost of electricity produced by PV. However, high demand scenarios will require greater cost reductions in order to make PV generated electricity <i> as competitive </i> as it needs to be to enable this growth. It is unclear whether established PV technologies — silicon, CdTe, GaAs, or CuInxGa1-xSe2 — can achieve the necessary breakthroughs in efficiency and price. A newer technology known as the &apos;perovskite solar cell&apos; (PSC) has recently emerged as promising contender. <br>     In the last seven years the efficiency of PSCs increased by the same amount covered by established technologies in the last thirty. However, PSCs suffer from chemical instability under operating conditions and hysteresis in current-voltage measurements used to characterize power output. Characterizing the defect structures formed by this material and how they interact with device performance and degradation may allow stabilization of PSCs. To that end, this work investigates defects in perovskite solar cells, the impact of these defects on performance, and the effect of alloying and degradation on the electronically active defect structure. Chapter I gives a brief introduction, motivating research in solar cells generally and perovskites in particular as well as introducing some challenges the technology faces. Chapter II gives some background in semiconductors and the device physics of solar cells. Chapter III introduces the performance and defect characterization methods employed. Chapter IV discusses results of these measurements on methylammonium lead triiodide cells correlating defects with device performance. Chapter V applies the some of the same techniques to a series of CH3NH3Pb(I1-xBrx)3 based perovskites aged for up to 2400 hours to explore the impact of alloying and aging on the defect structure. Chapter VI discusses implications for perovskite development and directions for future research. <br>     This dissertation includes previously published co-authored material.

This thesis presents a study of polystyrene (PS) microgel (MG), hole transfer materials (HTMs) and perovskite solar cells (PSCs) and associated effects to combine them together to increase the stabilities of PSCs. PSCs are a disruptive technology which attract a lot of attention because of their remarkable power conversion efficiency (PCE). However, PSCs are very fragile and easy to be damaged by moisture and oxygen. The PS MGs are solvent-swellable, inherently colloidally stable, hydrophobic, and have good film-forming properties. In the study, we mixed PS MG with three different HTMs, poly(3-hexylthiophene) (P3HT), Poly[bis(4-phenyl)(2,5,6-trimethylphenyl)amine (PTAA) and 2,2',7,7'-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene (Spiro-OMeTAD) to establish a diagram of concentrations of each component to form films. We investigated the morphology and light absorption and photoluminescence (PL) of HTM-MG films spin-coated from HTM-MG dispersions. The films containing flattened MG with an aspect ratio of around 10. MG islands containing packed particles were evident for both pure MG and P3HT-MG.

Thesis (Ph. D.)--Lehigh University, 2003. / Includes vita. Includes bibliographical references (leaves 194-209).

Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 193-195). Available also in a digital version from Dissertation Abstracts.