期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 8, 期 38, 页码 20037-20046出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta05583b
关键词
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资金
- Portuguese Foundation for Science and Technology (FCT) [SFRH/BD/147201/2019, SFRH/BD/119402/2016, SFRH/BD/137782/2018]
- European Union's Horizon 2020 Programme, through a FET Open research and innovation action [687008]
- European Regional Development Fund (ERDF), through COMPETE 2020 - Programa POCI [POCI01-0145-FEDER-006939]
- ERDF, through COMPETE 2020, under the PORTUGAL 2020 Partnership Agreement [POCI-01-0247-FEDER-017796]
- Laboratory for Process Engineering, Environment, Biotechnology and Energy - LEPABE - FCT/MCTES (PIDDAC) [UIDB/00511/2020]
- FCT
- (ERDF), through COMPETE 2020 - (OPCI) [POCI01-0145-FEDER-016387, PTDC/EQUEQU/30510/2017 - POCI-01-0145-FEDER-030510]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/147201/2019, SFRH/BD/119402/2016, SFRH/BD/137782/2018] Funding Source: FCT
Hermetic encapsulation protects perovskite solar cells (PSCs) from degradations induced by humidity and oxygen. A novel dual laser beam glass frit sealing process is developed and optimized to hermetically encapsulate PSCs. A 3D transient phenomenological model of the laser-assisted encapsulation is developed, validated and used to optimize the glass sealing procedure. During the laser-sealing process, the cells are subjected to 65 +/- 5 degrees C for a short time of <60 s. This extremely low process temperature glass sealing procedure is applied to encapsulate n-i-p PSCs fabricated with a poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) hole transport layer (HTL). The long-term stability of the encapsulated PSCs is examined under elevated humidity conditions and by thermal cycling tests. No performance variations after 500 h of humidity aging at 85% RH and 50 thermal cycles of -40 degrees C to 65 degrees C are observed. Though a 16% PCE loss is observed after thermal cycles between -40 degrees C and 85 degrees C, XRD analysis revealed no perovskite decomposition and the performance losses are assigned to the thermal degradation of the HTL material. A hermetic encapsulation is a critical step for the transition of PSCs from the laboratory to the market and this glass encapsulation ensures a successful path towards the commercialization of these emerging PV devices.
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