Registration Number
0225U002665,
(0120U102253)
, R & D reports
Title
Nanocrystals of multicomponent chalcogenides of Cu2ZnSnS4 type with cationic substitution and surface modification for thin-film photovoltaics.
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Дослідження нанокристалів багатокомпонентних халькогенідів типу Cu2ZnSnS4 iз катіонним заміщенням і модифікацією поверхні для тонкоплівкової фотовольтаїки
Head
Valakh Mykhailo Ya., Доктор фізико-математичних наук
Registration Date
26-03-2025
Organization
V. Lashkaryov Institute of Semiconductor Physics of National Academy
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The main purpose of the planned scientific research is to find ways to improve the structural perfection of nanocrystalline chalcogenide materials such as Cu2ZnSnS4 (CZTS) to increase the efficiency of their use in solar photoelectric cells. First of all, these compounds are characterized by a high concentration of their own structural defects related to cationic vacancies and antisite defects like CuZn and ZnCu, as well as the possible inclusions of secondary phases of binary and ternary chalcogenides such as CuS, ZnS, Cu2SnS etc.
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To achieve the goal of this stage of work, studies on the effect of replacing copper ions with significantly larger silver ions to reduce the concentration of anti-site defects were conducted. Nanocrystalline samples of Cu2ZnSnS4, which were obtained by the developed original method of low-temperature colloidal synthesis, were studied.
A series of film samples with Cu substitution for Ag in a concentration of up to 15% was obtained. Raman diagnostics of them showed the absence of signals from impurity phases of binary and ternary metal chalcogenides, which are found when using other higher-temperature synthesis methods.
The small half-width of the phonon peak in the Raman spectrum of the synthesized CZTS NCs and the manifestation of second- and third-order phonons indicate good crystallinity of the samples.
Characteristic Raman spectra of all possible binary and ternary impurity chalcogenide phases in CZTS, which were grown by the colloidal synthesis method under conditions identical to the growth of CZTS nanocrystals, have been established.
Product Description
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Havryliuk Yevhen O.
Hulie Yevhen H.
Dzhahan Volodymyr M.
Kapush Olha A.
Mazur Nazar V.
Yukhymchuk Volodymyr O.
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2025-03-26
