[19p-PB5-1~14] 13.9 Compound solar cells

[19p-PB5-6] Nanostructure evaluation of CZTS-film surface by tip-enhanced Raman scattering

〇(DC)RAUL RAMOS PAUCAR¹, KAZUKI WAKITA¹, YONG-GU SHIM², NAZIM MAMEDOV³ (1.Chiba Inst. of Tech., 2.Osaka Pref. Univ., 3.Inst. of Phys. Az. Nat. Acad.)

Keywords:chalcogenide solar cells, Compound solar cells, TERS

Tip-enhanced Raman spectroscopy (TERS) is a type of near-fieled optical spectroscopy.TERS uses a metal-coated tip that acts as a plasmonic antenna to enhance the Raman scattering from a nanometric sample. We can determine the spectrum of a small volume of sample in the close to the tip.
In this work, we present TERS imaging of Cu₂S nanophases on Cu₂ZnSnS₄ (CZTS) films deposited by pulse laser deposition method as we will show . In this observation, we find the Cu₂S phase is distinguished at a high resolution of approximately 10 nm. In conclusion, we successfully observed the phases on CZTS films with a high resolution on the nanoscale using TERS.