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\begin{document}

\title{Universal encapsulation adhesive for lead sedimentation and attachable
perovskite solar cells with enhanced performance.}



\author[1]{Xuehao Zhu}%
\author[1]{Haoyu Cai}%
\author[1]{Cong Bai}%
\author[1]{Wenjian Shen}%
\author[1]{Yiming Xiong}%
\author[1]{Juan Zhao}%
\author[1]{Fuzhi Huang}%
\author[1]{Yi-Bing Cheng}%
\author[1]{Jie  Zhong}%
\affil[1]{Wuhan University of Technology}%


\vspace{-1em}



  
  \date{May 27, 2024}


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\begin{abstract}
In this work, a modified polyurethane adhesive (PUA) was prepared to
realize a convenient encapsulation strategy for lead efficient
sedimentation and for attachable perovskite solar cells (PSCs). The
modified PUA can completely self-healing within 45 minutes at room
temperature and it has a lead ion blocking rate of 99.3\% in the
dripping experiment. The PUA film can directly contact with the metal
electrode surface with a slight efficiency improvement from 23.96\% to
24.15\%. The thermal stability of 65 and humidity stability of 55\% RH
is superior to the encapsulated devices with polyisobutylene. The PUA
film has strong adhesion to flexible substrate, and the initial
efficiency of flexible perovskite module (17.2\%) encapsulated by PUA
remains 92.6\% within 1825 h. These results suggest PUA encapsulation
route is universal for rigid and flexible PSCs with enhanced stability
and low lead hazardous. Moreover, it was found that the flexible PSCs
can be well attached to varied substrates with PUA, providing a facile
route for the attachable PSCs in various scenarios without additional
encapsulation and installation.%
\end{abstract}%



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