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Understanding Thin Film Stress to Improve Reliability and Stability of Perovskite Photovoltaics and Dynamic Windows
Understanding Thin Film Stress to Improve Reliability and Stability of Perovskite Photovoltaics and Dynamic Windows
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152704
- ISBN
- 9798384054801
- DDC
- 620.11
- 서명/저자
- Understanding Thin Film Stress to Improve Reliability and Stability of Perovskite Photovoltaics and Dynamic Windows
- 발행사항
- [Sl] : University of Colorado at Boulder, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 246 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
- 주기사항
- Advisor: McGehee, Michael.
- 학위논문주기
- Thesis (Ph.D.)--University of Colorado at Boulder, 2024.
- 초록/해제
- 요약This dissertation begins in Chapter 1 with an overview of the need for advancements in renewable energy and energy saving technologies with an introduction of technologies that are focused on: perovskite photovoltaics and dynamic windows. Despite the demonstrated promise of these thin film technologies to revolutionize their respective fields, several fundamental challenges remain. This thesis concerns itself with the challenges related to the mechanical reliability and stability of perovskite photovoltaics and dynamic windows. Chapter 2 provides background information on thin film mechanics and associated measurement methods to quantify stress and strain. The following three chapters highlights the work that I have done in my graduate school career on the development of thin film stress and strain in perovskite thin films. Chapter 3 details the complexity in which thermal stress develops in solution processed perovskite films which complicates the straightforward application of predictive equations. Chapter 4 aims to address a common misconception that had been present in the perovskite mechanics community: that thin contact layers with high coefficients of thermal expansion influence the underlying perovskite strain. Contrary to previously reported results, I show that a hot-casted, high coefficient of thermal expansion hole transport layer has minimal impact on the perovskite strain which aligns with predictions based on thin film mechanics theory. In Chapter 5, I unveil a new phenomenon for perovskite photovoltaics: stress relaxation driven by moisture uptake. I show that tension that is originally present within perovskites exhibits transient effects and that these films will alleviate their tension at the expense of degradation inducing uptake of foreign species such as moisture. In Chapter 6 details my efforts to understand and improve the durability of electrodeposited metal films for dynamic windows resting in a tinted state with transmission 0.1%. I show that windows based on Cu-Bi and Cu films mechanically fail due to stress corrosion cracking in less than 24 hours. With careful material selection I demonstrate that metal films based on Bi deposit under compression and are not susceptible to this failure mode and survive more than 9 weeks. Finally, Chapter 7 reflects on lingering hypotheses and provides perspective on potential future directions to extend the main ideas of this dissertation.
- 일반주제명
- Materials science
- 일반주제명
- Engineering
- 일반주제명
- Mechanics
- 키워드
- Dynamic windows
- 키워드
- Strain
- 키워드
- Stress
- 기타저자
- University of Colorado at Boulder Materials Science and Engineering
- 기본자료저록
- Dissertations Abstracts International. 86-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152704
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■007cr#unu||||||||
■020 ▼a9798384054801
■035 ▼a(MiAaPQ)AAI31488213
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a620.11
■1001 ▼aMcAndrews, Gabriel Ryan.▼0(orcid)0000-0001-7353-8598
■24510▼aUnderstanding Thin Film Stress to Improve Reliability and Stability of Perovskite Photovoltaics and Dynamic Windows
■260 ▼a[Sl]▼bUniversity of Colorado at Boulder▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a246 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-03, Section: B.
■500 ▼aAdvisor: McGehee, Michael.
■5021 ▼aThesis (Ph.D.)--University of Colorado at Boulder, 2024.
■520 ▼aThis dissertation begins in Chapter 1 with an overview of the need for advancements in renewable energy and energy saving technologies with an introduction of technologies that are focused on: perovskite photovoltaics and dynamic windows. Despite the demonstrated promise of these thin film technologies to revolutionize their respective fields, several fundamental challenges remain. This thesis concerns itself with the challenges related to the mechanical reliability and stability of perovskite photovoltaics and dynamic windows. Chapter 2 provides background information on thin film mechanics and associated measurement methods to quantify stress and strain. The following three chapters highlights the work that I have done in my graduate school career on the development of thin film stress and strain in perovskite thin films. Chapter 3 details the complexity in which thermal stress develops in solution processed perovskite films which complicates the straightforward application of predictive equations. Chapter 4 aims to address a common misconception that had been present in the perovskite mechanics community: that thin contact layers with high coefficients of thermal expansion influence the underlying perovskite strain. Contrary to previously reported results, I show that a hot-casted, high coefficient of thermal expansion hole transport layer has minimal impact on the perovskite strain which aligns with predictions based on thin film mechanics theory. In Chapter 5, I unveil a new phenomenon for perovskite photovoltaics: stress relaxation driven by moisture uptake. I show that tension that is originally present within perovskites exhibits transient effects and that these films will alleviate their tension at the expense of degradation inducing uptake of foreign species such as moisture. In Chapter 6 details my efforts to understand and improve the durability of electrodeposited metal films for dynamic windows resting in a tinted state with transmission 0.1%. I show that windows based on Cu-Bi and Cu films mechanically fail due to stress corrosion cracking in less than 24 hours. With careful material selection I demonstrate that metal films based on Bi deposit under compression and are not susceptible to this failure mode and survive more than 9 weeks. Finally, Chapter 7 reflects on lingering hypotheses and provides perspective on potential future directions to extend the main ideas of this dissertation.
■590 ▼aSchool code: 0051.
■650 4▼aMaterials science
■650 4▼aEngineering
■650 4▼aMechanics
■653 ▼aDynamic windows
■653 ▼aPerovskite photovoltaics
■653 ▼aStrain
■653 ▼aStress
■653 ▼aThin film mechanics
■690 ▼a0794
■690 ▼a0346
■690 ▼a0537
■71020▼aUniversity of Colorado at Boulder▼bMaterials Science and Engineering.
■7730 ▼tDissertations Abstracts International▼g86-03B.
■790 ▼a0051
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163411▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
