Publishers pdf, also known as version of record includes final page, issue and volume numbers. Materials interface engineering in perovskite photovoltaics jixian xu doctor of philosophy the edward s. Phd thesis project nirabsorbing dyesensitized solar cells. Perovskites, being ambipolar in nature, can conduct both electrons and holes. Methylamine ma perovskite was synthesized by two methods as suggested in literature. However, since perovskite materials are prone to degradation, their lifetime needs to be improved to that of silicon solar cells before these devices can be commercialized. Chargecarrier recombination is one of the most important properties of a solar cell. Vikram dalal, major professor rana biswas joseph shinar sumit chaudhary. Correlating structural and optoelectrical properties of. Development and optimisation of efficient spraycoated. Interface and composition analysis on perovskite solar cells. Based on the results a new structure was proposed for pb free perovskite solar cell back contactmasnbr3 masni3cdznsfto with pce of 18. A novel allsolidstate, hybrid solar cell based on organicinorganic metal halide perovskite ch 3 nh 3 pbx 3 materials has attracted great attention from the researchers all over the world and is considered to be one of the top 10 scientific breakthroughs in 20.
Device physics of organic and perovskite solar cells by mehran samiee esfahani a dissertation submitted to the graduate faculty in partial fulfillment of the requirements for the degree of doctor of philosophy major. The student will work in close collaboration with members from both the asi. Perovskite solar cell psc materials a perovskite solar cell, that was first reported by miyasaka et al. Despite the impressive photovoltaic performances with power conversion efficiency beyond 22%, perovskite solar cells are poorly stable under operation, failing by far the market requirements. Optimisation of fabrication processes for stable and. Though perovskite type materials are known for more than a century, the employment of novel hybrid organicinorganic perovskite materials as absorbers in photovoltaic was recently developed, firstly in. A new era of growth in the field of perovskite solar cells began this month, with the publication of a paper by mercouri kanatzidis, charles e. Within 5 years of development, the power conversion efficiency pce of pscs has reached 22.
The precursor solution was made bydissolving172mg fai,507mg pbi 2,22. Nanoscale study of perovskite solar cells for efficient. Perovskite materials offer excellent light absorption, chargecarrier mobilities, and lifetimes, resulting in high. The stability of perovskite solar cells is a vital issue that must be.
Methylammonium ma is one of the main obstacles that hold back the commercialization of perovskite solar cells pscs. Active layer control for high efficiency perovskite solar. Lowcost highefficiency solar cells with wafer bonding and plasmonic technologies thesis by katsuaki tanabe in partial fulfillment of the requirements for the degree of doctor of philosophy california institute of technology pasadena, california 2008 defended may 21, 2008. The quantum efficiency spectrum for the bonded cell was quite similar to that for each of. Molecular engineering towards high efficiency perovskite. Nrels applied perovskite program seeks to make perovskite solar cells a viable technology by removing barriers to commercialization by increasing efficiency, controlling stability, and enabling scaling. Phd thesis numerical analysis for efficiency enhancement of thin film solar cells author faisal baig supervisor. Development of absorbing materials for perovskite solar cells. Similar to organic semiconductors they tunable bandgaps3,4, but reaching superior transport show. The university of sheffield faculty of science sheffield physics and astronomy sheffield identification numberethosid. Centre for hybrid and organic solar energy, department of electronic engineering, university of rome tor vergata, via del politecnico 1, rome 003, italy. The final part of this thesis in chapter 4 concerns the integration of perovskite cells into tandem arrangements with a partner such as the crystalline silicon cell. Fabrication and characterization of planarstructure perovskite solar cells guoduan liu. To improve the charge separation and transport efficiency in perovskite solar cells pscs with a tio2based hybrid mesoscopicplanar architecture, cds and cdscn2h42cl2 are incorporated into the ch3nh3pbi3 active layer through in situ synthesis to prepare cds.
Whenever i was facing a predicament, he was always there. Recommended citation liu, guoduan, fabrication and characterization of planarstructure perovskite solar cells 2019. Perovskite materials, such as methylammonium lead halides and allinorganic cesium lead halide, are cheap to produce and simple to manufacture. Metaloxide based interlayers for organic and perovskite photovoltaics mehrad ahmadpour university of southern denmark. Morrison professor of chemistry at northwestern university, in the proceedings of the national academy of sciences pnas. Phd position on modelling of perovskite solar cells. Tandem solar cells perovskite hypercells graduate school. Organolead halide perovskite solar cells opsc which employed cui as hole. Of relevance to any thinfilm solar cell, and to 4terminal tandem cells in particular, is the specifications of its transparent conductor layers.
University of toronto 2017 abstract solar photovoltaics pv offer a sustainable solution to the daunting challenge of meeting the global energy demand. Life cycle assessment of perovskite solar cells and. Enhancing the efficiency and stability of perovskite solar. Stability, design architecture, photophysical properties, and morphology of the film in organometal halide perovskite.
Fraunhofer institute for solar energy systems ise is europes largest solar applicationoriented research into technical solutions for the use of solar solar cells is looking for a student for a master. Device physics of organic and perovskite solar cells. Liquid phase epitaxy the most common of the epitaxy methods is the liquid phase epitaxy, if the target is a fast and costefficient development and production of a less complex hetero. The perovskite solar cells studied in this thesis use ch3nh3pbi3 or mapi. University of groningen device physics of hybrid perovskite solar. It also introduces a specific computation process for this model. It receives special attention in the scientific community 8 and industry because of the lowcost, it is easy to fabricate and has high pce. Dalal, major professor rana biswas jaeyoun kim mani mina farzad sabzikar.
The objective of this thesis was to prepare, using solgel autocombustion method using tartric and citric acid as combustion agents, investigate the structural and dielectric and catalytic properties of the perovskite type oxides. Recently, a perovskite solar cell with leadbased absorber has received a lot of attention from solar cell producers since it offers the promise of relatively cheap and efficient solar cells news every day, 2015. Hcsi and the organic pv perovskite groups to design, implement and characterize thin films with the desired properties into solar cell architectures, using state of the art deposition and. Masters by research thesis, queensland university of technology. Perovskite solar cells psc is one the most recent photovoltaic approaches to transform directly sun light into electricity. But since holes are present in low concentration, a hole transport. Halide perovskites have demonstrated exceptional progress in pv cell performancefrom 3. Perovskite type oxides with the general formula abo 3. On the basis of the cost problem, we have developed new solar cells based on organic and organicinorganic hybrid materials. Perovskite solar cell a source of renewable green power.
Stability is one of the key points for real world application of solar cells and is mainly related to the processes that regulate the energy conversion, both in longterm degradation. Role of the cation in hybrid organicinorganic perovskite. Another method was explored to synthesize perovskite by slight variation to already reported method by replacing methylamine in ethanol with methylamine in water. In this thesis, optimisation of planar perovskite solar cells is carried out by the engineering of perovskite film fabrication methods. Defect chemistry and proton conductivity in babased perovskites. Trpl, in which the sample is excited with a light pulse and the decay of the.
Optimisation of fabrication processes for stable and scalable. Optimisation and characterisation of alternative hole. Based on these perovskite light absorbers, power conversion efficiencies of the perovskite solar cells employing hole transporting layers have increased from 9. One strategy to overcome this problem is to develop a controlled synthesis of perovskite nanocrystals which can then be ordered into films in a separatestep. Within the space of a few years, hybrid organicinorganic perovskite solar cells have emerged as one of the most exciting material platforms in the photovoltaic sector. Chapter 1 1 1 chapter 1 2 introduction 3 4 5 the organometal trihalide perovskite as light absorber in solar cells has amazed 6 everyone by obtaining in a short time span significant improvements in power 7 conversion efficiency pce.
University of pittsburgh, 2016 a recent forecast suggested that solar cell industry will contribute nearly one third of new electricity generation capacity worldwide by the year 2030. Because of the compositional flexibility of perovskites, they can also be tuned to ideally match the suns spectrum. My thesis explored and expanded beyond the scope of the aforementioned project to research different avenues for improving the efficiency of solar photovoltaic power system from the solar cell level to the solar array mounting, array tracking and dcac inversion system techniques. Furthermore, we fabricate perovskite solar cells with a novel backcontact structure, in which electron and holeselective electrodes are copositioned on the back side of the cell and spaced by 100. Her supervision was crucial for me to plan and finish my phd, and her. Recently, a new class of solar cell called perovskite solar cells has been introduced. One is a simplified model developed for perovskite absorber layer of pscs by using. Perovskite based solar cells iiser kolkata eprints.
University of bath phd synthesis of perovskite nanocrystals and. In contrast to the rapid progress in efficiency, our understanding of why hybrid perovskite solar cells perform so well is lacking. This thesis is based on the following papers, which are referred to in the text by their roman numerals. Defect chemistry and proton conductivity in babased perovskites thesis by jian wu in partial fulfillment of the requirements for the degree of doctor of philosophy california institute of technology pasadena, california 2005 defended oct 27, 2004. A perovskite solar panel is a kind of solar panel with a. When perovskite solar cells were first tried in solar cells in 2009 converted about 3. The phd project requires skills and qualifications in laser spectroscopy and molecular physics, which will be complemented by training provided in 1. Substratedependentphotoconductivitydynamicsina high. Also, research interest in methyl ammonium lead iodide perovskite solar cells has.
The opportunity to deposit these abundant materials with large area solution processing techniques could make perovskites viable for lowcost production. The efficiency of solar cells based on perovskites has rapidly increased from an initial promising value of 9% in 2012 to over 22% currently, making this the fastestadvancing solar cell technology. Rongsheng wei thesis pdf 3mb abstract this project focuses on simulation performance of perovskite solar cells using two models. Pscs are a promising new thinfilm technology, offering both high solar to electricity conversion efficiencies and cheap fabrication costs. Jun 27, 2014 the emergence of perovskite solar cells. Remarkably, such highefficiency perovskite solar cells can be made from polycrystalline materials by solution processing. A perovskite solar cell psc is a type of solar cell which includes a perovskite structured compound, most commonly a hybrid organicinorganic lead or tin halidebased material, as the lightharvesting active layer. Formamidinium fabased perovskite is a promising photovoltaic material due to its higher thermal stability and smaller bandgap. Performance and stability of perovskite solar cells by s m istiaque hossain a dissertation submitted to the graduate faculty in partial fulfillment of the requirements for the degree of doctor of philosophy major. It has been proposed that the ferroelectric polarization of perovskites may affect the electronic performance of pscs. Longterm stability is an ongoing concern of perovskite solar cells. Operating perovskite solar cell under concentrated solar light yen jung tu, m.
Life cycle assessment of perovskite solar cells and comparison to silicon solar cells masters thesis within the sustainable energy systems programme jonas stasiulionis department of energy and environment division of environmental systems analysis chalmers university of technology gothenburg, sweden 2015 report no. Nanoscale study of perovskite solar cells for efficient charge transport nirmal adhikari south dakota state university. Improved active layer morphology and porefilling in. New photoanodes and hole transporting materials for the. Thus, it is apparent that perovskite solar cell is a. Immense interest has been generated in organicinorganic perovskite solar cells pscs due to their favourable attributes. These problems hinder the future commercialization of halide perovskite solar cells. Preparation and characterization of lead halide perovskites. New solar cell material perovskite offers both cheap and efficient power. The main idea of this 9 thesis is to study the photophysical properties and the mechanisms affecting the 10 performance of solar cells. Improved environmental stability and solar cell efficiency of ma,fapbi3 perovskite using a widebandgap 1d thiazolium lead iodide capping layer strategy.
The work documented in this thesis concerns the control and modification of semiconducting perovskite thin films for their use in perovksite solar cells pscs. Jan 01, 2019 a new era of growth in the field of perovskite solar cells began this month, with the publication of a paper by mercouri kanatzidis, charles e. Oneyear stable perovskite solar cells by 2d3d interface. The perovskite solar cell psc is a recent contender within the photovoltaic research field. Characterization and application of pbbased organometal. Perovskites for clean energy clean energy institute.
The first part of this thesis illustrates a numerical model of perovskite solar cells pscs by using the matlab program. Perovskite solar cells have established their place as one of the most exciting solar cell technologies currently under investigation. Ch3nh3pbi3 bulkheterojunction f 2019 journal of materials chemistry. Performance and stability of perovskite solar cells iowa state. Femtosecond laser spectroscopy transient absorption and fluorescence spectroscopy, interpretation of spectrotemporal data, quantitative data analysis. Graduate theses and dissertations iowa state university capstones, theses and dissertations 2015 device physics of organic and perovskite solar cells mehran samiee esfahani iowa state university follow this and additional works at. Fabrication, optimization and portrayal phd thesis. With consistent research at different labs work perovskite pv device have already achieved 15%. Perovskite solar cells can be manufactured using simple, additive deposition techniques, like printing, for a fraction of the cost and energy. Unusual defect physics in ch3nh3pbi3 perovskite solar cell.
Materials interface engineering in perovskite photovoltaics. Draw my phd perovskite solar cells cameron underwood. High performance solidstate mesoscopic solar cells. Performance and stability of perovskite solar cells. The purpose of this thesis is to reproduce high performance psc from known recipe. Understanding the electronic and structural properties of perovskite solar cells with use of density functional theory if youd like to learn more about perovskite solar. High efficiency semiconductor based solar cells thesis of. Phd position on modelling of perovskite solar cells euraxess. Ch3nh3pbi3 bulkheterojunction f 2019 journal of materials chemistry a hot papers. I would like to thank associate professor morten madsen for giving me an opportunity as a phd student to be part of his research group. In a matter of a few years, the power conversion efficiency pce of the psc has catapulted from 4%. However, the halide perovskite solar cells are facing several serious problems, such as request of further improvement efficiency and the lead pollution.
The emergence of perovskite solar cells nature photonics. Perovskite solar cells psc performance has risen rapidly the last few years with. The lone hurdle to wide spread adoption of hybrid perovskite solar cells remains thermal and water stability. The phd thesis will explore this perovskite silicon tandem cell concept. Perovskite solar cells pscs are solar cells implemented with perovskite absorber. Perovskite solar cells psc are a relatively new concept. It has been accepted for inclusion in theses and dissertations by an authorized administrator of open prairie. Solar cells made from hybrid perovskite semiconductors have emerged only recently, yet their efficiency is already comparable to that of silicon solar cells. Pdf fabrication and characterization of perovskite solar cells. Pscs show promise to overcome the tradeoff between high efficiency and lowcost device fabrication. I believe that this thesis clearly goes beyond adapting interface materials from the organic or dye sensitized photovoltaic community but rather gives deep insight into the mechanisms being. In situ growth of 2d perovskite capping layer for stable. They adopt a perovskite crystal structures that contains a ybrid organich inorganic lead compound as their absorber layers.
One hot research topic is that of novel solar devices such as the hybrid inorganicorganic perovskite solar cell. High efficiency semiconductor based solar cells thesis of phd. It yielded predominantly yellow colored hydrated ma. Rational interfaces design of efficient organicinorganic. In the course of this phd thesis, new strategies in the design of perovskite solar cells were established based on molecular engineering by addressing 1 perovskite, 2 electron transport, as well as 3 hole transport layers, as detailed in the subsequent chapters. The perovskite materials can be used not only as lightabsorbing layer, but also as an electronhole transport layer due to the.