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Reaction of Copper and Copper(I) Iodide with Iodine and Strong Field Ligands
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Applied Physical Chemistry.
2022 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Reaktion av koppar och koppar(I) jodid med jod och starkfält ligander (Swedish)
Abstract [en]

Perovskit solceller (PSCs) är kända som 'ljusomvandling' enheter med ökad omvandlingseffektivitiet (PCE). PSCs är kända för detta flexibilitet och hög tolerans mot defekter och består av fem lager med olika material och egenskaper. De fem lagren är följande; transparant elektrod, elektron ledande lager (ETL), perovskit lager, hål ledande lager (HTL) och metallelektroden. 

Detta forskningsarbete fokuserar på metallelektroden (Cu-tunn film), HTL (CuI-tunn film) och det aktiva lagret (CuI-komplex). 

Syftet med denna studie är att undersöka effekten av olika tjocklekar på ytans morfologi och grovhet för att se mängden jod som tränger sig genom filmen genom att beräkna volymen. 

Resultatet av denna studie visar att ökad tjocklek leder till ökad grovhet. Man ser även att en ökad tjocklek leder till ett mer homogent och jämn yta, och dessutom ökar kornstorleken, vilket tyder på att kvaliten av kristallisationen förbättras. 

Slutligen, genom att känna till tjockleken och storleken (arean) på ytan av proverna kunde man beräkna volymen för att indikera mängden jod som trängt sig genom filmen. Resultatet av denna del indikerade att ju tjockare provet är, desto mer kommer jod att tränga sig genom filmen.

Abstract [en]

Perovskite solar cells (PSCs) are known as light-harvesting devices with increased power conversion efficiencies (PCE). PSCs are known for their flexibility and high tolerance towards defects. It consists of five different layers with different materials and functions. Transparent electrode, electron transport layer (ETL) , perovskite or active layer , hole transport layer (HTL) and metallic electrode. In this research project, the focus is directed towards the metallic electrode (Cu-thin film), hole transport layer (CuI-thin film) and the active layer (CuI-complex). The purpose of this study is to investigate the effect of different thicknesses on the surface morphology and roughness and to see how much iodine is diffusing through the film by calculating the volume. 

The results of this project present that the increase in thickness leads to an increase in roughness. It also shows that an increase in thickness leads to a more homogeneous and uniform surface and in addition the grain size increases which indicates that the quality of crystallization improves. Finally, by knowing the thickness and surface area of the samples the volume was calculated to indicate how much iodine is diffusing through the film and the results for this part indicated that the thicker the sample, more iodine will diffuse through the film. 

Place, publisher, year, edition, pages
2022.
Series
TRITA-CBH-GRU ; 2022:330
Keywords [en]
in films, AFM, copper iodide, solar cells, transparent conductive films
Keywords [sv]
tunnfilm, AFM, koppar jodid, solceller, transparent ledande film
National Category
Materials Chemistry Inorganic Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-322037OAI: oai:DiVA.org:kth-322037DiVA, id: diva2:1714155
Subject / course
Chemical Science and Engineering
Educational program
Degree of Master - Molecular Science and Engineering
Supervisors
Examiners
Available from: 2022-11-29 Created: 2022-11-29

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