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Investigating the Delamination Mechanisms and Degradation Kinetics of Solar Module Materials
Investigating the Delamination Mechanisms and Degradation Kinetics of Solar Module Materia...
Investigating the Delamination Mechanisms and Degradation Kinetics of Solar Module Materials

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105624
ISBN  
9798265429346
DDC  
600
저자명  
Liu, Kuan-Jen.
서명/저자  
Investigating the Delamination Mechanisms and Degradation Kinetics of Solar Module Materials
발행사항  
[Sl] : Stanford University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
278 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Dauskardt, Reinhold;Gu, Wendy.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2025.
초록/해제  
요약Delamination remains a cause of interfacial failure in perovskite and silicon modules that limit their lifetimes, posing a reliability risk. Delamination occurs when the driving force for fracture, G, exceeds the interfacial or bulk film fracture toughness, Gc. During the fabrication of the layers in a perovskite solar cell, delamination or thin-film fracture may occur due to tensile film stresses that build up due to thermal expansion coefficient mismatch between the charge transport and active layers with the underlying substrate, which is exacerbated when the deposited film thicknesses are large or if the processing temperatures are high. This dissertation first addresses the perovskite film fracture challenge by putting forward a predictive thin-film fracture mechanical model that links the processing parameters such as annealing temperature and film thickness to G. When G Gc, the model predicts delamination would occur, which clearly defines the limits on the processing temperatures and film thicknesses. Computations with common deposition methods and mechanical design guidelines are provided to prevent film fracture when manufacturing perovskite solar cells. Next, this dissertation discusses the delamination and encapsulant degradation reliability challenges in current commercial crystalline silicon photovoltaic modules. In silicon photovoltaic modules, degradation of the polymeric encapsulants that lead to mechanical embrittlement and delamination remains a cause of failure in solar installations, characterized by a decrease in the adhesion energy, Gc, at the encapsulant/cell and encapsulant/glass interfaces over prolonged field aging times. This dissertation presents a predictive multiscale reliability model that connects the degraded encapsulant molecular structure and interfacial bonding to the decreasing mechanical and fracture properties. The model is applied to predict the lifetimes of solar modules that contain common commercial encapsulants such as poly(ethylene-co-vinyl) acetate (EVA) and polyolefin elastomer (POE). The reliability model incorporates previous missing aspects such as incorporating encapsulant crosslinking, identifying the failure interface, and rigorously computing the contribution of attendant plasticity during the delamination (fracture) process. Next, this dissertation presents accelerated aging experiments on free-standing encapsulant films and adhesion coupons (cell/encapsulant/glass laminates). These aging tests, when combined with chemical, thermal, and mechanical characterization techniques, are used to probe the degradation and crosslinking kinetics in the polymeric encapsulants and their interfaces with the adjacent cell and glass substrates. These results further provide experimental data to validate the multiscale reliability model. Accelerated aging conditions were picked to systematically vary the environmental stressors (temperature, humidity, UV) to study their impacts on degradation rates. This work then investigates how the order of sequenced tests (e.g. UV weathering before hygrometric aging vs. after hygrometric aging) affects degradation rates and interfacial adhesion, which could potentially be incorporated into the IEC standards to ensure more robust modules. Lastly, future directions for research are discussed that could further advance the solar reliability research presented in this work.
일반주제명  
Mechanical properties
일반주제명  
Physical fitness
일반주제명  
Failure
일반주제명  
Glass substrates
일반주제명  
Thermogravimetric analysis
일반주제명  
Discount coupons
일반주제명  
Thin films
일반주제명  
Polymers
일반주제명  
Polyethylene
일반주제명  
Materials science
일반주제명  
Spectrum analysis
일반주제명  
Temperature effects
일반주제명  
Fourier transforms
일반주제명  
Kinetics
일반주제명  
Silicon wafers
일반주제명  
Curing
일반주제명  
High school basketball
일반주제명  
Fracture mechanics
일반주제명  
Analytical chemistry
일반주제명  
Condensed matter physics
일반주제명  
Kinesiology
일반주제명  
Mathematics
일반주제명  
Mechanics
일반주제명  
Optics
일반주제명  
Polymer chemistry
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
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MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a600
■1001  ▼aLiu,  Kuan-Jen.
■24510▼aInvestigating  the  Delamination  Mechanisms  and  Degradation  Kinetics  of  Solar  Module  Materials
■260    ▼a[Sl]▼bStanford  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a278  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Dauskardt,  Reinhold;Gu,  Wendy.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2025.
■520    ▼aDelamination  remains  a  cause  of  interfacial  failure  in  perovskite  and  silicon  modules  that  limit  their  lifetimes,  posing  a  reliability  risk.  Delamination  occurs  when  the  driving  force  for  fracture,  G,  exceeds  the  interfacial  or  bulk  film  fracture  toughness,  Gc.  During  the  fabrication  of  the  layers  in  a  perovskite  solar  cell,  delamination  or  thin-film  fracture  may  occur  due  to  tensile  film  stresses  that  build  up  due  to  thermal  expansion  coefficient  mismatch  between  the  charge  transport  and  active  layers  with  the  underlying  substrate,  which  is  exacerbated  when  the  deposited  film  thicknesses  are  large  or  if  the  processing  temperatures  are  high.  This  dissertation  first  addresses  the  perovskite  film  fracture  challenge  by  putting  forward  a  predictive  thin-film  fracture  mechanical  model  that  links  the  processing  parameters  such  as  annealing  temperature  and  film  thickness  to  G.  When  G    Gc,  the  model  predicts  delamination  would  occur,  which  clearly  defines  the  limits  on  the  processing  temperatures  and  film  thicknesses.  Computations  with  common  deposition  methods  and  mechanical  design  guidelines  are  provided  to  prevent  film  fracture  when  manufacturing  perovskite  solar  cells.  Next,  this  dissertation  discusses  the  delamination  and  encapsulant  degradation  reliability  challenges  in  current  commercial  crystalline  silicon  photovoltaic  modules.  In  silicon  photovoltaic  modules,  degradation  of  the  polymeric  encapsulants  that  lead  to  mechanical  embrittlement  and  delamination  remains  a  cause  of  failure  in  solar  installations,  characterized  by  a  decrease  in  the  adhesion  energy,  Gc,  at  the  encapsulant/cell  and  encapsulant/glass  interfaces  over  prolonged  field  aging  times.  This  dissertation  presents  a  predictive  multiscale  reliability  model  that  connects  the  degraded  encapsulant  molecular  structure  and  interfacial  bonding  to  the  decreasing  mechanical  and  fracture  properties.  The  model  is  applied  to  predict  the  lifetimes  of  solar  modules  that  contain  common  commercial  encapsulants  such  as  poly(ethylene-co-vinyl)  acetate  (EVA)  and  polyolefin  elastomer  (POE).  The  reliability  model  incorporates  previous  missing  aspects  such  as  incorporating  encapsulant  crosslinking,  identifying  the  failure  interface,  and  rigorously  computing  the  contribution  of  attendant  plasticity  during  the  delamination  (fracture)  process.  Next,  this  dissertation  presents  accelerated  aging  experiments  on  free-standing  encapsulant  films  and  adhesion  coupons  (cell/encapsulant/glass  laminates).  These  aging  tests,  when  combined  with  chemical,  thermal,  and  mechanical  characterization  techniques,  are  used  to  probe  the  degradation  and  crosslinking  kinetics  in  the  polymeric  encapsulants  and  their  interfaces  with  the  adjacent  cell  and  glass  substrates.  These  results  further  provide  experimental  data  to  validate  the  multiscale  reliability  model.  Accelerated  aging  conditions  were  picked  to  systematically  vary  the  environmental  stressors  (temperature,  humidity,  UV)  to  study  their  impacts  on  degradation  rates.  This  work  then  investigates  how  the  order  of  sequenced  tests  (e.g.  UV  weathering  before  hygrometric  aging  vs.  after  hygrometric  aging)  affects  degradation  rates  and  interfacial  adhesion,  which  could  potentially  be  incorporated  into  the  IEC  standards  to  ensure  more  robust  modules.  Lastly,  future  directions  for  research  are  discussed  that  could  further  advance  the  solar  reliability  research  presented  in  this  work.
■590    ▼aSchool  code:  0212.
■650  4▼aMechanical  properties
■650  4▼aPhysical  fitness
■650  4▼aFailure
■650  4▼aGlass  substrates
■650  4▼aThermogravimetric  analysis
■650  4▼aDiscount  coupons
■650  4▼aThin  films
■650  4▼aPolymers
■650  4▼aPolyethylene
■650  4▼aMaterials  science
■650  4▼aSpectrum  analysis
■650  4▼aTemperature  effects
■650  4▼aFourier  transforms
■650  4▼aKinetics
■650  4▼aSilicon  wafers
■650  4▼aCuring
■650  4▼aHigh  school  basketball
■650  4▼aFracture  mechanics
■650  4▼aAnalytical  chemistry
■650  4▼aCondensed  matter  physics
■650  4▼aKinesiology
■650  4▼aMathematics
■650  4▼aMechanics
■650  4▼aOptics
■650  4▼aPolymer  chemistry
■690    ▼a0794
■690    ▼a0486
■690    ▼a0611
■690    ▼a0575
■690    ▼a0405
■690    ▼a0346
■690    ▼a0752
■690    ▼a0495
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360819▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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