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    Optical properties of GaSe semiconducting crystals intercalated by CdTe nanoparticles

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    The transmission spectra of GaSe crystals intercalated by CdTe nanoparticles (NPs) from aqueous colloidal solutions were investigated at 77 K in the range of GaSe excitonic absorption. Solutions of two types – yellow (with 1-2.5 nm NPs) and orange (with 2.5-3.5 nm NPs) – were used for the experiments. Essential GaSe optical density intensity growth in proportion to exposition time was observed after intercalation from yellow solutions up to 50 days. While the exciton peak position (near 2.1 eV) coincides both in β€œpure” GaSe and GaSe(CdTe) after intercalation from yellow solution, the shortwave shift is observed for GaSe(CdTe) intercalated from the orange solutions. The results are discussed in assumption of strain effect presence

    Π—ΠΌΡ–Π½Π° ΠΎΠΏΡ‚ΠΈΡ‡Π½ΠΈΡ… властивостСй моносСлСнідів Ρ–Π½Π΄Ρ–ΡŽ Ρ– Π³Π°Π»Ρ–ΡŽ ΠΏΡ€ΠΈ Ρ‚Π΅Ρ€ΠΌΡ–Ρ‡Π½ΠΎΠΌΡƒ Π²ΠΏΡ€ΠΎΠ²Π°Π΄ΠΆΠ΅Π½Π½Ρ– NaNO2

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    The effect of the thermal introduction of NaNO2 on the optical properties of indium and gallium monoselenides was investigated. The transmission spectra of InSe and GaSe and their NaNO2-intercalates were identified by means of the installation spectrometric collected on the basis of monochromator MDR-23. It was found that the time dependence of the concentration of NaNO2-intercalates has the non-monotonic character with areas of different intercalation speeds.ДослідТСно спСктри пропускання Π² області Скситонного поглинання для монокристалів InSe Ρ– GaSe, Скспонованих Π² Ρ€ΠΎΠ·ΠΏΠ»Π°Π²Ρ– солі NaNO2. ВстановлСні Π½Π΅ΠΌΠΎΠ½ΠΎΡ‚ΠΎΠ½Π½Ρ– ΠΊΠΎΠ½Ρ†Π΅Π½Ρ‚Ρ€Π°Ρ†Ρ–ΠΉΠ½Ρ– залСТності Π΅Π½Π΅Ρ€Π³Π΅Ρ‚ΠΈΡ‡Π½ΠΎΠ³ΠΎ полоТСння Скситонного максимуму ЕСкс. ВстановлСно, Ρ‰ΠΎ Π½Π΅ΠΌΠΎΠ½ΠΎΡ‚ΠΎΠ½Π½ΠΈΠΉ зсув, який ΡΠΏΠΎΡΡ‚Π΅Ρ€Ρ–Π³Π°Ρ”Ρ‚ΡŒΡΡ ΠΏΡ€ΠΈ Π’ = 77 Πš для максимуму ЕСкс ΠΏΡ€ΠΈ Π·Π±Ρ–Π»ΡŒΡˆΠ΅Π½Π½Ρ– часу Π²ΠΈΡ‚Ρ€ΠΈΠΌΠΊΠΈ, ΠΎΠ±ΡƒΠΌΠΎΠ²Π»Π΅Π½ΠΈΠΉ виникнСнням ΠΌΡ–ΠΆΡˆΠ°Ρ€ΠΎΠ²ΠΈΡ… Π΄Π΅Ρ„ΠΎΡ€ΠΌΠ°Ρ†Ρ–ΠΉΠ½ΠΈΡ… Π½Π°ΠΏΡ€ΡƒΠ³ Ρ‚Π° Π·ΠΌΡ–Π½ΠΈ Π²Π΅Π»ΠΈΡ‡ΠΈΠ½ΠΈ Ξ΅0 Π΄Ρ–Π΅Π»Π΅ΠΊΡ‚Ρ€ΠΈΡ‡Π½ΠΎΡ— постійної кристалу внаслідок впровадТСння інтСркалянта Π² ΠΌΡ–ΠΆΡˆΠ°Ρ€ΠΎΠ²ΠΈΠΉ простір
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