Temperature‐dependent study of the Raman A mode of Cu₂ZnSnS₄ thin films

Abstract

This temperature-dependent Raman study of kesterite phase Cu 2 ZnSnS 4 (CZTS) thin film was performed over the temperature range 98-378 K. A detailed qualitative analysis showed that the Raman data for the ''A'' mode of vibration, the strongest peak for kesterite CZTS films, fit very well to a damped harmonic oscillator (DHO) model. This investigation of temperature-dependent Raman data shows that the observed frequency shift is due to the cumulative effect of thermal expansion and anharmonicity resulting from a 4-phonon damping process. The temperature dependence of linewidth is also consistent with the above analysis.

Fabrication of Efficient Cu2ZnSnS4 Solar Cells by Sputtering Single Stoichiometric Target

“…It reveals that all absorbers share very similar Raman spectra indicating peaks of the dominant CZTS phase with no other apparent phases. It shows an asymmetric Raman main peak at 337 cm −1 which matches well with other researchers' findings in the literature [17,18]. The peak asymmetry was believed to be accounted for by phone confinement and strain, especially for small grain sized polycrystalline CZTS film [18].…”

Synthesis of Bulk Kesterite – A Prospective Photovoltaic Material

“…Small differences are observed between the peak positions measured and the literature results. [10,[13][14][15][16][17] This effect, as well as the uncertainty of the Raman peak assignment, clearly shows the need of studies aiming deeper interpretation of Raman scattering results.…”

“…The Brillouin zone center phonon modes symmetry coincides with the space group representation of the kesterite structure and can be decomposed into irreducible representations as follows: Γ = 3A + 6B + 6E 1 + 6E 2 . [13][14][15][16][17] The Raman scattering spectrum of Cu 2 ZnSnS 4 crystal is presented in Figure 5. Table 4 summarizes the measured Raman peak positions and the literature results, both experimental and theoretical.…”

Микроструктура и комбинационное рассеяние света тонких пленок Cu-=SUB=-2-=/SUB=-ZnSnSe-=SUB=-4-=/SUB=-, осажденных на гибкие металлические подложки

“…Следует отметить, что частота более низкой интенсивности 172 см −1 также уменьшается при более высокой степени возбуждения. Уменьшение частоты фононов для A-моды структуры кестерита с увеличением температуры (мощности лазе-ра) можно объяснить с помощью модели возмущения, согласно которой сдвиг частоты происходит из-за сов-местных факторов, таких как тепловое расширение и ангармоническое фонон-фонон ное взаимодействие [36].…”