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Understanding and Addressing the Degradation Mechanisms Associated With the Reverse Bias Stability of Perovskite Solar Cells
Understanding and Addressing the Degradation Mechanisms Associated With the Reverse Bias Stability of Perovskite Solar Cells
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104825
- ISBN
- 9798291578742
- DDC
- 338.9
- 서명/저자
- Understanding and Addressing the Degradation Mechanisms Associated With the Reverse Bias Stability of Perovskite Solar Cells
- 발행사항
- [Sl] : University of Colorado at Boulder, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 216 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
- 주기사항
- Advisor: McGehee, Michael D.
- 학위논문주기
- Thesis (Ph.D.)--University of Colorado at Boulder, 2025.
- 초록/해제
- 요약This thesis begins in Chapter 1 by discussing the background and fundamental challenges regarding the stability of perovskite solar cells. Chapter 2 then highlights the current understanding of the degradation mechanisms associated with reverse biased perovskite solar cells. Chapter 3 begins with discussing the work done by my co-author and I to understand the degradation of perovskite solar cells caused by pre-existing pinholes. My co-author and I show that the abrupt breakdown often observed in perovskite solar cells is caused by these pinholes. We also show that these pinholes may behave as a secondary diode within the active area and can remain "hidden" during forward bias measurements. We provide evidence that these are the true cause for the shunting observed by many other researchers within the community, rather than attributing the shunting to the formation of metallic filaments.Chapter 4 discusses the more recent work I have done using NiOX as a hole transport layer (HTL). I show that NiOX can help prevent the abrupt breakdown of cells in reverse bias, primarily due to its enhanced thermal stability compared to organic HTLs. I then show that the incorporation of a second HTL (PTAA or Me-4PACz) further improves the stability of devices without atomic layer-deposited (ALD) SnOX by preventing the localized Joule heating from occurring at the bottom ITO electrode within these pinholes. Even when incorporating ALD SnOX at the ETL, we find that cells will still break down within these pinholes, but the damage is only prevented when using NiOX. We also demonstrate that pinholes are the root cause of failure by fabricating miniature solar cells that are pinhole-free, allowing breakdown voltages to exceed -10 V. These breakdown voltages would enable the use of bypass diodes in modules, highlighting the need for incorporating more thermally robust materials such as NiOX and ALD SnOX when considering designing modules. Finally, Chapter 5 reflects on the existing testing protocols for PSCs operating in reverse bias and emphasizes the need for establishing a standardized methodology to further improve our understanding of the degradation associated with reverse biasing perovskite solar cells.
- 일반주제명
- Sustainability
- 일반주제명
- Energy
- 일반주제명
- Alternative energy
- 키워드
- Reverse bias
- 기타저자
- University of Colorado at Boulder Materials Science and Engineering
- 기본자료저록
- Dissertations Abstracts International. 87-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■006m o d
■007cr#unu||||||||
■020 ▼a9798291578742
■035 ▼a(MiAaPQ)AAI32169808
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a338.9
■1001 ▼aMorales, Daniel Antonio, Jr.▼0(orcid)0000-0002-5645-9596
■24510▼aUnderstanding and Addressing the Degradation Mechanisms Associated With the Reverse Bias Stability of Perovskite Solar Cells
■260 ▼a[Sl]▼bUniversity of Colorado at Boulder▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a216 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-02, Section: B.
■500 ▼aAdvisor: McGehee, Michael D.
■5021 ▼aThesis (Ph.D.)--University of Colorado at Boulder, 2025.
■520 ▼aThis thesis begins in Chapter 1 by discussing the background and fundamental challenges regarding the stability of perovskite solar cells. Chapter 2 then highlights the current understanding of the degradation mechanisms associated with reverse biased perovskite solar cells. Chapter 3 begins with discussing the work done by my co-author and I to understand the degradation of perovskite solar cells caused by pre-existing pinholes. My co-author and I show that the abrupt breakdown often observed in perovskite solar cells is caused by these pinholes. We also show that these pinholes may behave as a secondary diode within the active area and can remain "hidden" during forward bias measurements. We provide evidence that these are the true cause for the shunting observed by many other researchers within the community, rather than attributing the shunting to the formation of metallic filaments.Chapter 4 discusses the more recent work I have done using NiOX as a hole transport layer (HTL). I show that NiOX can help prevent the abrupt breakdown of cells in reverse bias, primarily due to its enhanced thermal stability compared to organic HTLs. I then show that the incorporation of a second HTL (PTAA or Me-4PACz) further improves the stability of devices without atomic layer-deposited (ALD) SnOX by preventing the localized Joule heating from occurring at the bottom ITO electrode within these pinholes. Even when incorporating ALD SnOX at the ETL, we find that cells will still break down within these pinholes, but the damage is only prevented when using NiOX. We also demonstrate that pinholes are the root cause of failure by fabricating miniature solar cells that are pinhole-free, allowing breakdown voltages to exceed -10 V. These breakdown voltages would enable the use of bypass diodes in modules, highlighting the need for incorporating more thermally robust materials such as NiOX and ALD SnOX when considering designing modules. Finally, Chapter 5 reflects on the existing testing protocols for PSCs operating in reverse bias and emphasizes the need for establishing a standardized methodology to further improve our understanding of the degradation associated with reverse biasing perovskite solar cells.
■590 ▼aSchool code: 0051.
■650 4▼aSustainability
■650 4▼aEnergy
■650 4▼aAlternative energy
■653 ▼aDegradation mechanisms
■653 ▼aPerovskite solar cells
■653 ▼aReverse bias
■653 ▼aHole transport layer
■653 ▼aAtomic layer-deposited
■690 ▼a0640
■690 ▼a0791
■690 ▼a0363
■71020▼aUniversity of Colorado at Boulder▼bMaterials Science and Engineering.
■7730 ▼tDissertations Abstracts International▼g87-02B.
■790 ▼a0051
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359040▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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