Study of CdS/CdS Nanoparticles Thin Films Deposited by Soft Chemistry for Optoelectronic Applications
Chalcogenides semiconductors are currently being studied as active layers in the development of electronic devices in the field of applied technology. In the present paper, cadmium sulfide (CdS) thin films containing nanoparticles of the same material as the active layer were produced and analyzed f...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/14/6/1168 |
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| author | Laura Aislinn Carrasco-Chavez José F. Rubio-Valle Abimael Jiménez-Pérez José E. Martín-Alfonso Amanda Carrillo-Castillo |
| author_facet | Laura Aislinn Carrasco-Chavez José F. Rubio-Valle Abimael Jiménez-Pérez José E. Martín-Alfonso Amanda Carrillo-Castillo |
| author_sort | Laura Aislinn Carrasco-Chavez |
| collection | DOAJ |
| description | Chalcogenides semiconductors are currently being studied as active layers in the development of electronic devices in the field of applied technology. In the present paper, cadmium sulfide (CdS) thin films containing nanoparticles of the same material as the active layer were produced and analyzed for their application in fabricating optoelectronic devices. CdS thin films and CdS nanoparticles were obtained via soft chemistry at low temperatures. The CdS thin film was deposited via chemical bath deposition (CBD); the CdS nanoparticles were synthesized via the precipitation method. The construction of a homojunction was completed by incorporating CdS nanoparticles on CdS thin films deposited via CBD. CdS nanoparticles were deposited using the spin coating technique, and the effect of thermal annealing on the deposited films was investigated. In the modified thin films with nanoparticles, a transmittance of about 70% and a band gap between 2.12 eV and 2.35 eV were obtained. The two characteristic phonons of the CdS were observed via Raman spectroscopy, and the CdS thin films/CdS nanoparticles showed a hexagonal and cubic crystalline structure with average crystallite size of 21.3–28.4 nm, where hexagonal is the most stable for optoelectronic applications, with roughness less than 5 nm, indicating that CdS is relatively smooth, uniform and highly compact. In addition, the characteristic curves of current-voltage for as-deposited and annealed thin films showed that the metal-CdS with the CdS nanoparticle interface exhibits ohmic behavior. |
| first_indexed | 2024-03-11T02:09:11Z |
| format | Article |
| id | doaj.art-6018c3e871fc4b819abb3f80b2e5c2b3 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-11T02:09:11Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-6018c3e871fc4b819abb3f80b2e5c2b32023-11-18T11:39:20ZengMDPI AGMicromachines2072-666X2023-05-01146116810.3390/mi14061168Study of CdS/CdS Nanoparticles Thin Films Deposited by Soft Chemistry for Optoelectronic ApplicationsLaura Aislinn Carrasco-Chavez0José F. Rubio-Valle1Abimael Jiménez-Pérez2José E. Martín-Alfonso3Amanda Carrillo-Castillo4Institute of Engineering and Technology, Autonomous University of Ciudad Juarez, Juarez Chihuahua 32310, MexicoChemical Product and Process Technology Research Center (Pro2TecS), Department of Chemical Engineering and Materials Science, University of Huelva, 21071 Huelva, SpainInstitute of Engineering and Technology, Autonomous University of Ciudad Juarez, Juarez Chihuahua 32310, MexicoChemical Product and Process Technology Research Center (Pro2TecS), Department of Chemical Engineering and Materials Science, University of Huelva, 21071 Huelva, SpainInstitute of Engineering and Technology, Autonomous University of Ciudad Juarez, Juarez Chihuahua 32310, MexicoChalcogenides semiconductors are currently being studied as active layers in the development of electronic devices in the field of applied technology. In the present paper, cadmium sulfide (CdS) thin films containing nanoparticles of the same material as the active layer were produced and analyzed for their application in fabricating optoelectronic devices. CdS thin films and CdS nanoparticles were obtained via soft chemistry at low temperatures. The CdS thin film was deposited via chemical bath deposition (CBD); the CdS nanoparticles were synthesized via the precipitation method. The construction of a homojunction was completed by incorporating CdS nanoparticles on CdS thin films deposited via CBD. CdS nanoparticles were deposited using the spin coating technique, and the effect of thermal annealing on the deposited films was investigated. In the modified thin films with nanoparticles, a transmittance of about 70% and a band gap between 2.12 eV and 2.35 eV were obtained. The two characteristic phonons of the CdS were observed via Raman spectroscopy, and the CdS thin films/CdS nanoparticles showed a hexagonal and cubic crystalline structure with average crystallite size of 21.3–28.4 nm, where hexagonal is the most stable for optoelectronic applications, with roughness less than 5 nm, indicating that CdS is relatively smooth, uniform and highly compact. In addition, the characteristic curves of current-voltage for as-deposited and annealed thin films showed that the metal-CdS with the CdS nanoparticle interface exhibits ohmic behavior.https://www.mdpi.com/2072-666X/14/6/1168cadmium sulfidechalcogenide semiconductorthin filmsnanoparticles |
| spellingShingle | Laura Aislinn Carrasco-Chavez José F. Rubio-Valle Abimael Jiménez-Pérez José E. Martín-Alfonso Amanda Carrillo-Castillo Study of CdS/CdS Nanoparticles Thin Films Deposited by Soft Chemistry for Optoelectronic Applications Micromachines cadmium sulfide chalcogenide semiconductor thin films nanoparticles |
| title | Study of CdS/CdS Nanoparticles Thin Films Deposited by Soft Chemistry for Optoelectronic Applications |
| title_full | Study of CdS/CdS Nanoparticles Thin Films Deposited by Soft Chemistry for Optoelectronic Applications |
| title_fullStr | Study of CdS/CdS Nanoparticles Thin Films Deposited by Soft Chemistry for Optoelectronic Applications |
| title_full_unstemmed | Study of CdS/CdS Nanoparticles Thin Films Deposited by Soft Chemistry for Optoelectronic Applications |
| title_short | Study of CdS/CdS Nanoparticles Thin Films Deposited by Soft Chemistry for Optoelectronic Applications |
| title_sort | study of cds cds nanoparticles thin films deposited by soft chemistry for optoelectronic applications |
| topic | cadmium sulfide chalcogenide semiconductor thin films nanoparticles |
| url | https://www.mdpi.com/2072-666X/14/6/1168 |
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