Data for: Air Exposure Oxidation and Photooxidation of Solution-Phase Treated PbS Quantum Dot Thin Films and Solar Cells

Published: 9 September 2019| Version 1 | DOI: 10.17632/2xwr4bdwxr.1
Contributor:
Hossein Beygi

Description

Figure 1. a) X-ray diffraction pattern of the synthesized particles is consistent with the standard pattern of rock-salt PbS, b) TEM image and the size distribution histogram indicate that the synthesized QDs are monodispersed and have an average diameter of 3 nm with a standard deviation of 9.43%, c) the emission and absorption spectra of the colloidal QDs. Figure 2. AFM images (ARA AFM instrument, Ara research, Iran) of PbS QDs thin films prepared by different methods: a) LBL process consisting 13 times repetition of QDs deposition, solid-state ligand exchange with MPA, and washing steps, b) single-step deposition of MPA-treated QDs, c) single-step deposition of MAI-treated QDs. Figure 3. PL spectra of colloidal and thin films of PbS QDs treated with different ligands: a) OA, b) BA, c) MPA, d) TBAI, e) MAI, f) MAPbI3. Figure 4. Effect of air exposure times on the PL spectra of PbS QD thin films treated with different ligands: a) OA, b) BA, c) MPA, d) TBAI, e) MAI, f) MAPbI3. Figure 5. Variations of PL peak shifts of the different surface treated PbS QDs thin films over the long terms of air exposure. Figure 6. The XPS full scan (a) and XPS Pb 4f (b) spectra of the OA-capped PbS QDs thin film before and after 10 days of air exposure. Deconvolution of XPS Pb 4f spectra of air-free (c) and air-exposed (d) OA-capped PbS QDs thin films to their chemical components. Figure 7. a) Atomistic model of 3 nm PbS QDs with a truncated octahedron morphology. Schematic of ligands coverage and oxygen penetration pathways to the surface of PbS QDs treated with OA (b), TBAI (c), MAI (d), BA (e), MPA (f), and MAPbI3 (g) ligands. Figure 8. The XPS full scan (a) and XPS I 3d (b) spectra of the PbS QDs thin film before and after the TBAI ligand exchange. Deconvolution of XPS Pb 4f spectra of air-free (c) and air-exposed (d) iodide-capped PbS QDs thin films to their chemical components. Figure 9. XPS spectra of PbS QD thin films before and after the MAPbI3 ligand exchange: a) the XPS full scan, b) XPS I 3d spectrum, c) XPS N 1s spectrum, and d) XPS Pb 4f spectrum. Figure 10. XPS spectra of MAPbI3-treated PbS QDs thin films before and after 10 days of air storage: a) the XPS full scan, b) XPS I 3d spectrum, c) XPS Pb 4f spectrum, d) deconvolution of XPS Pb 4f spectra of the air-exposed thin film to its chemical components. Figure 11. Time-resolved PL signals of PbS QD thin films treated with different ligands, under two different cycles of continuous and intermittent laser illumination (λ= 1064 nm). Figure 12. PCE variations of p-n (a) and p-i-n (b) QDSCs at different air storage times (Background: schematic structure of the fabricated devices).

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