AN ENCAPSULATION STUDY FOR FLEXIBLE PEROVSKITE SOLAR CELLS TO WITHSTAND HIGH TEMPERATURE AND HUMIDITY CONDITIONS
Shyantan Dasgupta a d, Taimoor Ahmad b c, Samy Almosni b, Senol Oz b, Konrad Wojciechowski a b
a Saule Research Institute; Dunska11, Wroclaw 54-427, Poland
b Saule Technologies Ltd.; Dunska11, Wroclaw 54-427, Poland
c University of Rome “Tor Vergata”, Department of Electronics Engineering, Via del Politecnico 1, 00133 Rome, Italy
d Faculty of Materials Engineering and Technical Physics, Poznan University of Technology, Piotrowo 3, Poznan 60-965, Poland
Proceedings of 13th Conference on Hybrid and Organic Photovoltaics (HOPV21)
Online, Spain, 2021 May 24th - 28th
Organizers: Marina Freitag, Feng Gao and Sam Stranks
Poster, Shyantan Dasgupta, 177
Publication date: 11th May 2021
ePoster: 

Perovskite solar cells  attracted a lot of interest in the photovoltaic community in the recent years, recording a very fast pace of improving photovoltaic performance. Versatile and low temperature fabrication methods of functional layers in these devices enable application of flexible, polymeric substrates. This, in turn, opens the possibility of offering new, disrupting solutions, such as low-cost manufacturing (roll-to-roll processing), mechanical flexibility, and high specific power.

However, the long-term reliability of these devices poses one of the major concerns for the large-scale utilization of the perovskite technology. Recently, multiple reports showed significant progress in reported stabilities of perovskite solar cells when subjected to accelerated aging tests, including conditioning at elevated temperature (85 oC). In order to pass damp heat test (85 oC, 85% RH), one of the most demanding tests in IEC reliability norms, robust device encapsulation needs to be realized, which is still a challenge for flexible architectures.

In this work, we have tested various encapsulation structures (different adhesives, barrier materials, edge sealants, busbar connections) of perovskite devices with a carbon back contact electrode and subjected them to 85 oC aging tests in inert (glovebox) or high humidity (climate chamber, 85% RH) conditions. We have obtained effective laminates, showing promising stability in the aging test, indicating robust encapsulation.  Furthermore, we have identified significant impact of various processing steps (edge sealing, busbar connection, lamination pressure, etc.) on reliability result. [ST2]

[ST1]monopoly? in what sense perovskite PV gripped ‘monopoly’?

[ST2]damp heat is one of many tests in this norm.

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