Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 52, Issue 7, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/aaf1f4
Keywords
encapsulation; laser processing; perovskite solar cell; hermetic; sealing
Categories
Funding
- EFACEC
- Portuguese Foundation for Science and Technology (FCT) [SFRH/BD/119402/2016]
- European Union [687008]
- European Research Council [321315]
- European Regional Development Fund (ERDF), through COMPETE 2020-Operational Programme for Competitiveness and Internationalization (OPCI) [POCI-01-0145-FEDER-016387]
- FCT [POCI-01-0247-FEDER-017796]
- European Commission through the Seventh Framework Programme
- 'WinPSC' [POCI-01-0247-FEDER-017796]
- ERDF, through the Operational Programme for Competitiveness and Internationalisation (COMPETE 2020), under the PORTUGAL 2020
- ERDF, through COMPETE2020-Programa Operacional Competitividade e Internacionalizacao (POCI) [POCI-01-0145-FEDER-006939]
- national funds, through FCT-Fundacao para a Ciencia e a Tecnologia
- North Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the ERDF [NORTE-01-0145-FEDER-000005-LEPABE-2-ECO-INNOVATION]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/119402/2016] Funding Source: FCT
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A hermetic laser-assisted glass frit encapsulation, at a process temperature of 120 degrees C, was developed for perovskite solar cell application. The hermeticity and long-term stability of the sealing was examined based on standard tests for photovoltaic (PV) applications. Encapsulations using fluorine doped tin oxide (FTO)-coated glass substrates displayed 8.93 x 10(-8) atm center dot cm(3) center dot s(-1) air leak rate after five cycles of a humidity-freeze test according to the IEC61646 standard; a rate lower than the reject limit of the MIL-STD-883 standard test for fine leaks. Devices sealed with a TiO2 blocking layer and FTO scribing-denoted as an empty perovskite solar cell-showed that the encapsulation is compatible with the various thermal coefficient of expansion regions of perovskite solar cells (PSCs). The applicability of the MIL-STD-883 standard was studied in detail and it was concluded that a new method is required to measure the fine helium leak rate of devices with cavity sizes larger than 5.5 x 5.5 cm(2). The developed sealing process is scalable for larger devices; therefore, it guarantees a new step forward for the industrialization of PSCs.
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