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Gas chromatography-mass spectrometry analyses of encapsulated stable perovskite solar cells.

Science (New York, N.Y.) (2020-05-23)
Lei Shi, Martin P Bucknall, Trevor L Young, Meng Zhang, Long Hu, Jueming Bing, Da Seul Lee, Jincheol Kim, Tom Wu, Noboru Takamure, David R McKenzie, Shujuan Huang, Martin A Green, Anita W Y Ho-Baillie
ABSTRACT

Although perovskite solar cells have produced remarkable energy conversion efficiencies, they cannot become commercially viable without improvements in durability. We used gas chromatography-mass spectrometry (GC-MS) to reveal signature volatile products of the decomposition of organic hybrid perovskites under thermal stress. In addition, we were able to use GC-MS to confirm that a low-cost polymer/glass stack encapsulation is effective in suppressing such outgassing. Using such an encapsulation scheme, we produced multi-cation, multi-halide perovskite solar cells containing methylammonium that exceed the requirements of the International Electrotechnical Commission 61215:2016 standard by surviving more than 1800 hours of the Damp Heat test and 75 cycles of the Humidity Freeze test.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
L-(−)-Malic acid, ≥95% (titration)

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