Novel laser-assisted glass frit encapsulation for long-lifetime perovskite solar cells

• Type: Article in International Scientific Journal
• Date: 2020-10-14

Authors

Martins, M. (Author) Other; Seyedali Emami (Author) Other; Madureira, R. (Author) Other; Joaquim Gabriel Magalhães Mendes (Author) FEUP; Ivanou, D. (Author) FEUP; Adélio Mendes (Author) FEUP

Journal

Title: Journal of Materials Chemistry A

Vol. 8

ISSN: 2050-7488

Publisher: Royal Society of Chemistry

Indexing

ISI Web of Knowledge - 30 Citations

Scopus - 33 Citations

Scientific classification

FOS: Engineering and technology > Chemical engineering

Associated Projects

LEPABE - Financiamento Plurianual 2020-2023 da Unidade de I&D LEPABE - Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia

WINPSC - Novos avanços tecnológicos para a terceira geração de células solares sensibilizadas com perovskita

SunStorage - Recolha e armazenamento de energia solar

SunFlow - Armazenamento de energia solar em baterias redox de caudal

Other information

Authenticus ID: P-00S-V2N

DOI: 10.1039/d0ta05583b

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10