Thermal stability enhancement of perovskite MAPbI(3) film at high temperature (150 degrees C) by PMMA encapsulation

Soo, Yew Hang and Ng, Soo Ai and Wong, Yew Hoong and Ng, Chai Yan (2021) Thermal stability enhancement of perovskite MAPbI(3) film at high temperature (150 degrees C) by PMMA encapsulation. Journal of Materials Science-Materials in Electronics, 32 (11). pp. 14885-14900. ISSN 0957-4522, DOI

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Methylammonium lead iodide (MAPbI(3)) is a perovskite material functioning as a light-absorbing layer in a perovskite solar cell (PSC). However, many works reported the poor thermal stability of MAPbI(3), which hindered the direct annealing of low-temperature processed (<= 150 degrees C) metal oxide sols as a charge transport layer (CTL) on top of it. In this work, a poly(methyl methacrylate) (PMMA) layer was spin coated onto the ambient air-prepared MAPbI(3) film to act as an encapsulation layer. The encapsulated MAPbI(3) film was annealed at 150 degrees C for 1-5 h. The PMMA passivated the grain boundary defects located at film/air interface and extended the onset of thermal degradation time up to 3 h, which is significantly longer than the annealing time required for metal oxide sol CTLs. The MAPbI(3) phase also remained dominant even after 5 h of annealing, showing its high thermal stability. With this thermal stability enhancement, it would open a pathway for the fabrication of PSCs with metal oxide sol CTLs that are low cost, high stability, as well as low temperature processed (<= 150 degrees C).

Item Type: Article
Funders: Universiti Tunku Abdul Rahman [UTARRF/2017-C2/N01], Universiti Malaya [IIRG018B-2019]
Uncontrolled Keywords: Methylammonium lead iodidee; Lectron-transport layer; Processed vanadium-oxide; Solar-cells; Hole-transport; Induced degradation; Extraction layer; Thin-film; Efficient; Performance
Subjects: Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering > Department of Mechanical Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 18 Apr 2022 00:53
Last Modified: 18 Apr 2022 00:53

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