Rapid evaluation of different perovskite absorber layers through the application of depth profile analysis using glow discharge - Time of flight mass spectrometry

TALANTA

卷:192

Article

Fernandez, Beatriz¹  Lobo, Lara¹  Tyagi, Priyanka²  Stoichkov, Vasil²  Kettle, Jeff²  Pereiro, Rosario¹ 

[1] Univ Oviedo, Fac Chem, Dept Phys & Analyt Chem, Julian Claveria 8, E-33006 Oviedo, Spain

[2] Bangor Univ, Sch Elect Engn, Dean St, Bangor LL57 1UT, Gwynedd, Wales

关键词: Thin film solar cells;    Perovskite solar cells;    Depth profile analysis;    Radiofrequency pulsed glow discharge;    Time of flight mass spectrometry;   

DOI  :  10.1016/j.talanta.2018.09.059

来源: Elsevier

【 摘 要 】

Depth profile analysis of perovskite absorber layers deposited onto glass substrates is investigated by radio-frequency pulsed glow discharge - time of flight mass spectrometry (rf-PGD-ToFMS). Elemental depth profiles obtained for perovskite films fabricated using a double-step deposition route with different precursors (methylammonium iodide and PbI2, PbCl2 or PbBr2) show varying distribution of the principle components depending on the precursors employed. Furthermore, the results show that rf-PGD-ToFMS allows to identify traces of residue solvent used in the initial film preparation (dimethyl sulphoxide or dimethylformamide) and to identify differences produced by film thickness and oxygen uptake caused by exposure to ambient conditions. The approach also enables inspection of the differences in elemental diffusion and the degradation processes. By using rf-PGD-ToFMS, no ultra-high-vacuum is needed for processing and rapid analysis of absorber films can be obtained in less than 40 s. The demonstration of such powerful analytical technique for obtaining depth profile information could enable groups in the field to better optimize processing conditions and enhance stability.

【 授权许可】

Free