A Low-Temperature Removable Package for Organic-inorganic Hybrid Perovskite Solar Cells Under Water
Junkai Yang a, Feng Yang a, Xingye Zhang a, Yong-Sang Kim a
a Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, Gyeonggi, 16419, Republic of Korea
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of International Conference on Perovskite and Organic Photovoltaics and Optoelectronics (IPEROP19)
Kyōto-shi, Japan, 2019 January 27th - 29th
Organizers: Hideo Ohkita, Atsushi Wakamiya and Mohammad Nazeeruddin
Poster, Feng Yang, 148
Publication date: 23rd October 2018

Organic-inorganic perovskite solar cells (PSCs) have been showing huge potential in new photovoltaic technology due to their excellent optoelectronic properties. However, water sensitivity of these devices has become an urgent issue to be solved. Packaging is one of the most important tools to improve perovskite solar cell device stability. Benefiting from good chemical stability and transparency, polydimethylsiloxane (PDMS) has been widely used in fabrication processes for microfluidic and electronic devices. In this work, we propose a facile and efficient passivation way applying hydrophobic fluoropolymer (CYTOP) and PDMS. CYTOP was spin-coated on the surface of devices at 80 ℃ and PDMS was annealed at 75 ℃. Thus, CYTOP and PDMS form a compact and removable package for the solar cells. To evaluate the influence of the barriers in cells toward harsh environment, we exposed the packaged ones to de-ionized water. Combining with the top glass sheet, the waterproof ability of the PSCs is characterized by the photovoltaic performance degradation after exposed to water. It is found that the open circuit voltage and short-circuit current density of packaged cells only suffer 33% loss for both through a 10 hours de-ionized water-soaking. Such a feasible method unlocks a kind of valuable route for protecting the perovskite solar cells from harsh moist environment.

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