TY  - JOUR
AU  - Sun, Lulu
AU  - Fukuda, Kenjiro
AU  - Guo, Ruiqi
AU  - Castriotta, Luigi A.
AU  - Forberich, Karen
AU  - Zhou, Yinhua
AU  - Someya, Takao
AU  - Brabec, Christoph J.
AU  - Almora, Osbel
TI  - A Flexible Photovoltaic Fatigue Factor for Quantification of Mechanical Device Performance
JO  - Advanced functional materials
VL  - 35
IS  - 19
SN  - 1616-301X
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2025-02633
SP  - 2422706
PY  - 2025
AB  - Flexible emerging photovoltaic technologies, such as organic and perovskite photovoltaics, hold great potential for integration into tents, wearable electronics, and other portable applications. Recently, Fukuda et al. (2024) propose a bending test protocol for standardizing the mechanical performance characterization of flexible solar cells, focusing on 1% strain over 1 000 bending cycles. This marked an important step toward establishing consistency and good practices in the literature. However, even with this unified protocol, accurately comparing the mechanical flexibility of solar cells is hindered by the variated influence of parameters like thickness, bending radius, and power conversion efficiency (PCE) evolution during mechanical testing. Herein, a new figure of merit is introduced, the flexible photovoltaic fatigue factor (F), which integrates PCE retention, strain, and bending cycles into a cohesive framework. Guided by a detailed multilayer mechanical model, this metric enables more accurate strain analysis and promotes consistent reporting, paving the way for performance optimization in flexible photovoltaics.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001389848300001
DO  - DOI:10.1002/adfm.202422706
UR  - https://juser.fz-juelich.de/record/1042652
ER  -