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@INPROCEEDINGS{Castriotta:1044678,
      author       = {Castriotta, Luigi Angelo and Fukuda, Kenjiro and Almora,
                      Osbel and Sun, Lulu and Uddin, Md Aslam and Jiao, Haoyang
                      and Forberich, Karen and J. Brabec, Christoph and Huang,
                      Jinsong},
      title        = {{S}tandardized {P}rotocols for {E}valuating {M}echanical
                      {P}erformance of {F}lexible {S}olar {C}ells $\&$ {M}odules:
                      {I}nsights from new {P}rocedures {ISOS}-{B}, {ISOS}-{M}, and
                      {N}ovel {B}ending {T}ests},
      publisher    = {FUNDACIO DE LA COMUNITAT VALENCIANA SCITO València},
      reportid     = {FZJ-2025-03327},
      pages        = {},
      year         = {2025},
      comment      = {Proceedings of the International Conference on Hybrid and
                      Organic Photovoltaics - FUNDACIO DE LA COMUNITAT VALENCIANA
                      SCITO València, 2025. - ISBN -
                      doi:10.29363/nanoge.hopv.2025.119},
      booktitle     = {Proceedings of the International
                       Conference on Hybrid and Organic
                       Photovoltaics - FUNDACIO DE LA
                       COMUNITAT VALENCIANA SCITO València,
                       2025. - ISBN -
                       doi:10.29363/nanoge.hopv.2025.119},
      abstract     = {The advancement of flexible photovoltaic (PV) technologies
                      needs the establishment of standardized protocols for their
                      characterization, particularly concerning mechanical
                      performance and durability. Here we show newly proposed
                      standard procedures such as ISOS-B, ISOS-M and a new
                      protocol for measuring PCE over 1000 bending cycles under
                      $1\%$ strain, which aim to complete existing guidelines such
                      as IEC 61215 and IEC 61646.ISOS-B focus on bending stress
                      testing. This protocol is crucial for accurately assessing
                      the mechanical stability of flexible PV devices, which can
                      exhibit negligible degradation even under extreme bending
                      conditions. ISOS-M addresses mechanical and long-term
                      stability under various environmental conditions, suggesting
                      tests in controlled ambient conditions to isolate the
                      effects of mechanical stress from other environmental
                      factors. This is essential for understanding how flexible
                      devices perform over time, especially when exposed to
                      real-world conditions. We further evaluate the need to
                      measure the mechanical stability of a flexible device
                      independently from the thickness and on the material
                      properties of the substrate, by calculating its strain and
                      defining a new figure of merit called fatigue factor. The
                      introduction of a fatigue factor quantifies the mechanical
                      performance of flexible PV devices, facilitating objective
                      comparisons of durability and efficiency. This factor allows
                      researchers to evaluate the relationship between mechanical
                      stress and electrical performance. In conclusion, by
                      improving upon existing IEC guidelines, these standards
                      provide a robust framework for evaluating the mechanical and
                      environmental performance of flexible PV technologies,
                      ultimately contributing to their commercialization and
                      integration into different applications. The integration of
                      these standardized procedures fosters advancements in
                      flexible photovoltaics, leading to improved device
                      reliability and performance in practical applications.},
      month         = {May},
      date          = {2025-05-12},
      organization  = {12º nternational Conference on Hybrid
                       and Organic Photovoltaics, Roma
                       (Italy), 12 May 2025 - 14 May 2025},
      cin          = {IET-2},
      cid          = {I:(DE-Juel1)IET-2-20140314},
      pnm          = {1213 - Cell Design and Development (POF4-121) / 1214 -
                      Modules, stability, performance and specific applications
                      (POF4-121)},
      pid          = {G:(DE-HGF)POF4-1213 / G:(DE-HGF)POF4-1214},
      typ          = {PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
      doi          = {10.29363/nanoge.hopv.2025.119},
      url          = {https://juser.fz-juelich.de/record/1044678},
}