{"title":"纯WS2和纳米复合WS2/MoS2薄膜异质结光电探测器","authors":"Avneesh Kumar, Ajeet Gupta, Arun Kumar, Surbhi, Himanshu Sharma, Arvind Kumar, Mudit P. Srivastava, Devendra Kumar Rana","doi":"10.1007/s10971-025-06736-2","DOIUrl":null,"url":null,"abstract":"<div><p>Pure WS<sub>2</sub> and composite WS<sub>2</sub>/MoS<sub>2</sub> thin films deposited by the CBD method have been studied for photodetector applications with different wavelengths. XRD results show a polycrystalline rhombohedral phase with crystallite size of ~41 nm and ~27 nm, for pure and composite thin films, respectively. The optical absorption spectra of pure WS<sub>2</sub> and composite WS<sub>2</sub>/MoS<sub>2</sub> thin films show absorption in the region from 320 nm to 720 nm, making these thin films a workable photodetector in the visible range. The band gap was observed to be ~2.18 eV, 2.86 eV for WS<sub>2</sub> while 1.97 eV, 2.83 eV, 3.32 eV for WS<sub>2</sub>/MoS<sub>2</sub>. I–V characteristics were measured across the heterojunction to determine the transport properties. Low saturation current of the order of 10<sup>−8 </sup>A, low sub-second response and recovery time for monochromatic light sources of red, green and blue were obtained. The linear dynamic range was 3.00–11.94 which makes these thin films, by comparing the figure of merit value the WS<sub>2</sub>/MoS<sub>2</sub> nanocomposite heterostructure thin film over p-Si shows prominent results for application as broad-range photodetectors in the visible region.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"114 3","pages":"799 - 811"},"PeriodicalIF":2.3000,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Pure WS2 and nano composite WS2/MoS2 thin film based heterojunction photodetector\",\"authors\":\"Avneesh Kumar, Ajeet Gupta, Arun Kumar, Surbhi, Himanshu Sharma, Arvind Kumar, Mudit P. Srivastava, Devendra Kumar Rana\",\"doi\":\"10.1007/s10971-025-06736-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Pure WS<sub>2</sub> and composite WS<sub>2</sub>/MoS<sub>2</sub> thin films deposited by the CBD method have been studied for photodetector applications with different wavelengths. XRD results show a polycrystalline rhombohedral phase with crystallite size of ~41 nm and ~27 nm, for pure and composite thin films, respectively. The optical absorption spectra of pure WS<sub>2</sub> and composite WS<sub>2</sub>/MoS<sub>2</sub> thin films show absorption in the region from 320 nm to 720 nm, making these thin films a workable photodetector in the visible range. The band gap was observed to be ~2.18 eV, 2.86 eV for WS<sub>2</sub> while 1.97 eV, 2.83 eV, 3.32 eV for WS<sub>2</sub>/MoS<sub>2</sub>. I–V characteristics were measured across the heterojunction to determine the transport properties. Low saturation current of the order of 10<sup>−8 </sup>A, low sub-second response and recovery time for monochromatic light sources of red, green and blue were obtained. The linear dynamic range was 3.00–11.94 which makes these thin films, by comparing the figure of merit value the WS<sub>2</sub>/MoS<sub>2</sub> nanocomposite heterostructure thin film over p-Si shows prominent results for application as broad-range photodetectors in the visible region.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":664,\"journal\":{\"name\":\"Journal of Sol-Gel Science and Technology\",\"volume\":\"114 3\",\"pages\":\"799 - 811\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2025-03-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Sol-Gel Science and Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10971-025-06736-2\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sol-Gel Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10971-025-06736-2","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Pure WS2 and nano composite WS2/MoS2 thin film based heterojunction photodetector
Pure WS2 and composite WS2/MoS2 thin films deposited by the CBD method have been studied for photodetector applications with different wavelengths. XRD results show a polycrystalline rhombohedral phase with crystallite size of ~41 nm and ~27 nm, for pure and composite thin films, respectively. The optical absorption spectra of pure WS2 and composite WS2/MoS2 thin films show absorption in the region from 320 nm to 720 nm, making these thin films a workable photodetector in the visible range. The band gap was observed to be ~2.18 eV, 2.86 eV for WS2 while 1.97 eV, 2.83 eV, 3.32 eV for WS2/MoS2. I–V characteristics were measured across the heterojunction to determine the transport properties. Low saturation current of the order of 10−8 A, low sub-second response and recovery time for monochromatic light sources of red, green and blue were obtained. The linear dynamic range was 3.00–11.94 which makes these thin films, by comparing the figure of merit value the WS2/MoS2 nanocomposite heterostructure thin film over p-Si shows prominent results for application as broad-range photodetectors in the visible region.
期刊介绍：
The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.
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