DOI: https://doi.org/10.29363/nanoge.stabperoworkshop.2023.005
Publication date: 20th January 2023
Halide perovskite solar cells is a very promising technology as an alternative to low cost and high-performance photovoltaics. Some of the main challenges of bringing perovskite technologies to market are efficiency, low cost and technically viable manufacturing, and long-term stability. Each of the key aspects has its own development; for example, efficiency has already surpassed values of 25%, and there are various publications demonstrating scalability and solution processing with very promising results particularly using slot die techniques [1]. This presentation will focus on two aspects: first, the analysis of ideality factor (nID) [2] for perovskite mini modules measured under outdoor conditions as a tool to follow up the performance and to understand the device degradation. Second, to mitigate this degradation process, some strategies to encapsulate the mini modules have been successfully implemented and evaluated.
Encapsulation tests have been carried out on minimodules fabricated on rigid and flexible substrates. In both cases, the edge-sealing structure for encapsulation was polyisobutylene (PIB) sealant by Quanex (SolarGain®) [3], [4]. In addition, glass and polymers coextruded with EVO were used as barrier material for rigid and flexible encapsulation, respectively. The encapsulation methodology developed is compatible with flexible substrates and allows the process to be carried out at a temperature of 100°C without compromising the thermal stability of the mini-modules. Finally, devices were tested under ambient conditions with MAPI perovskite solar cells in PIN structure and T80 efficiency was achieved after 1000 h of exposure.
Halide perovskite solar cells is a very promising technology as an alternative to low cost and high-performance photovoltaics. Some of the main challenges of bringing perovskite technologies to market are efficiency, low cost and technically viable manufacturing, and long-term stability. Each of the key aspects has its own development; for example, efficiency has already surpassed values of 25%, and there are various publications demonstrating scalability and solution processing with very promising results particularly using slot die techniques [1]. This presentation will focus on two aspects: first, the analysis of ideality factor (nID) [2] for perovskite mini modules measured under outdoor conditions as a tool to follow up the performance and to understand the device degradation. Second, to mitigate this degradation process, some strategies to encapsulate the mini modules have been successfully implemented and evaluated.
Encapsulation tests have been carried out on minimodules fabricated on rigid and flexible substrates. In both cases, the edge-sealing structure for encapsulation was polyisobutylene (PIB) sealant by Quanex (SolarGain®). In addition, glass and polymers coextruded with EVO were used as barrier material for rigid and flexible encapsulation, respectively. The encapsulation methodology developed is compatible with flexible substrates and allows the process to be carried out at a temperature of 100°C without compromising the thermal stability of the mini-modules. Finally, devices were tested under ambient conditions with MAPI perovskite solar cells in PIN structure and T80 efficiency was achieved after 1000 h of exposure.
We gratefully acknowledge the financial support provided by the Colombia Scientific Program within the framework of the call Ecosistema Científico (contract no. FP44842—218-2018).
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