Photoelectric response in sandwich structures based on condensed layers of Ag2S quantum dots passivated with thioglycolic acid
The study is aimed at developing a technique for forming a structure with a Schottky barrier in the form of a mltilayer Al-Ag2S-ITO sandwich structure, which includes a condensate of colloidal Ag2S quantum dots passivated with thioglycolic acid molecules (Ag2S/TGA QDs). The spectral properti...
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| Format: | Article |
| Language: | English |
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Voronezh State University
2023-06-01
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| Series: | Конденсированные среды и межфазные границы |
| Subjects: | |
| Online Access: | https://journals.vsu.ru/kcmf/article/view/11100 |
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| author | Vladimir S. Gurchenko Alim S. Mazinov Mikhail S. Smirnov Irina G. Grevtseva Lolita P. Nesterenko Oleg V. Ovchinnikov |
| author_facet | Vladimir S. Gurchenko Alim S. Mazinov Mikhail S. Smirnov Irina G. Grevtseva Lolita P. Nesterenko Oleg V. Ovchinnikov |
| author_sort | Vladimir S. Gurchenko |
| collection | DOAJ |
| description | The study is aimed at developing a technique for forming a structure with a Schottky barrier in the form of a mltilayer Al-Ag2S-ITO sandwich structure, which includes a condensate of colloidal Ag2S quantum dots passivated with thioglycolic acid molecules (Ag2S/TGA QDs).
The spectral properties were studied using a USB2000+ spectrometer (Ocean Optics, USA) with a USB-DT light source (Ocean Optics, USA). Electrophysical and photoelectric properties of the structures were studied using a Keysight B1500A semiconductor device analyzer (Keysight tech, USA). The study of the temperature dependences of the properties in the temperature range from 300 to 360 K was carried out in a Shielded room (Faraday cage) placed in a muffle furnace. It was found that the conductivity of the Al-Ag2S-ITO structure is mostly governed by the Schottky barrier at the Al-condensed Ag2S QDs film junction.
At the junction between the condensed Ag2S QDs film and Al, signs of the formation of a rectifying contact were found.
Under the action of the optical radiation with a wavelength of 650 nm and less, which corresponds to the most probable exciton transition in the UV-Vis absorption of Ag2S/TGA QDs, an increase in the current was found for the negative branch of the J-V curve. |
| first_indexed | 2024-03-12T17:37:39Z |
| format | Article |
| id | doaj.art-640bbdf2e1a648849be3cc0628407b37 |
| institution | Directory Open Access Journal |
| issn | 1606-867X |
| language | English |
| last_indexed | 2024-03-12T17:37:39Z |
| publishDate | 2023-06-01 |
| publisher | Voronezh State University |
| record_format | Article |
| series | Конденсированные среды и межфазные границы |
| spelling | doaj.art-640bbdf2e1a648849be3cc0628407b372023-08-04T09:11:49ZengVoronezh State UniversityКонденсированные среды и межфазные границы1606-867X2023-06-0125210.17308/kcmf.2023.25/11100Photoelectric response in sandwich structures based on condensed layers of Ag2S quantum dots passivated with thioglycolic acidVladimir S. Gurchenko0https://orcid.org/0000-0002-8270-3820Alim S. Mazinov1https://orcid.org/0000-0003-0834-2390Mikhail S. Smirnov2https://orcid.org/0000-0001-8765-0986Irina G. Grevtseva3https://orcid.org/0000-0002-1964-1233Lolita P. Nesterenko4Oleg V. Ovchinnikov5https://orcid.org/0000-0001-6032-9295V. I. Vernadsky Crimean Federal University, 4 prospekt Vernadskogo, Simferopol 295007, Republic of Crimea, Russian Federation postgraduate student of the Department of Radiophysics and Electronics, Institute of Physics and Technology, V. I. Vernadsky Crimean Federal University (Simferopol, Republic of Crimea, Russian Federation).V. I. Vernadsky Crimean Federal University, 4 prospekt Vernadskogo, Simferopol 295007, Republic of Crimea, Russian Federation Dr. Sci. (Phys.–Math.)., Associate Professor, Head of the Department of Radiophysics and Electronics, Institute of Physics and Technology, V. I. Vernadsky Crimean Federal University (Simferopol, Republic of Crimea, Russian Federation).Voronezh State University, 1 Universitetskaya pl., Voronezh, 394018, Russian Federation Dr. Sci. (Phys.–Math.)., Associate Professor, Department of Optics and Spectroscopy, Voronezh State University (Voronezh, Russian Federation).Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation Cand. Sci. (Phys.–Math.)., Senior Lecturer at the Department of Optics and Spectroscopy, Voronezh State University, Voronezh, Russian Federation.Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation Cand. Sci. (Phys.–Math.)., Associate Professor, Department of Experimental Physics, Voronezh State University (Voronezh, Russian Federation).Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation Dr. Sci. (Phys.–Math.)., Full Professor, Head of the Department of Optics and Spectroscopy, Voronezh State University (Voronezh, Russian Federation). The study is aimed at developing a technique for forming a structure with a Schottky barrier in the form of a mltilayer Al-Ag2S-ITO sandwich structure, which includes a condensate of colloidal Ag2S quantum dots passivated with thioglycolic acid molecules (Ag2S/TGA QDs). The spectral properties were studied using a USB2000+ spectrometer (Ocean Optics, USA) with a USB-DT light source (Ocean Optics, USA). Electrophysical and photoelectric properties of the structures were studied using a Keysight B1500A semiconductor device analyzer (Keysight tech, USA). The study of the temperature dependences of the properties in the temperature range from 300 to 360 K was carried out in a Shielded room (Faraday cage) placed in a muffle furnace. It was found that the conductivity of the Al-Ag2S-ITO structure is mostly governed by the Schottky barrier at the Al-condensed Ag2S QDs film junction. At the junction between the condensed Ag2S QDs film and Al, signs of the formation of a rectifying contact were found. Under the action of the optical radiation with a wavelength of 650 nm and less, which corresponds to the most probable exciton transition in the UV-Vis absorption of Ag2S/TGA QDs, an increase in the current was found for the negative branch of the J-V curve.https://journals.vsu.ru/kcmf/article/view/11100silver sulfideactivation energycharge carrier mobilityconduction mechanismsschottky barrier |
| spellingShingle | Vladimir S. Gurchenko Alim S. Mazinov Mikhail S. Smirnov Irina G. Grevtseva Lolita P. Nesterenko Oleg V. Ovchinnikov Photoelectric response in sandwich structures based on condensed layers of Ag2S quantum dots passivated with thioglycolic acid Конденсированные среды и межфазные границы silver sulfide activation energy charge carrier mobility conduction mechanisms schottky barrier |
| title | Photoelectric response in sandwich structures based on condensed layers of Ag2S quantum dots passivated with thioglycolic acid |
| title_full | Photoelectric response in sandwich structures based on condensed layers of Ag2S quantum dots passivated with thioglycolic acid |
| title_fullStr | Photoelectric response in sandwich structures based on condensed layers of Ag2S quantum dots passivated with thioglycolic acid |
| title_full_unstemmed | Photoelectric response in sandwich structures based on condensed layers of Ag2S quantum dots passivated with thioglycolic acid |
| title_short | Photoelectric response in sandwich structures based on condensed layers of Ag2S quantum dots passivated with thioglycolic acid |
| title_sort | photoelectric response in sandwich structures based on condensed layers of ag2s quantum dots passivated with thioglycolic acid |
| topic | silver sulfide activation energy charge carrier mobility conduction mechanisms schottky barrier |
| url | https://journals.vsu.ru/kcmf/article/view/11100 |
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