Pub Date : 2008-05-22DOI: 10.2174/1874846500801010010
Lung-Chien Chen, Chuncai Pan
ZnO ultraviolet (UV)/visible photodiodes were fabricated. The N-In codoped p-type ZnO films were deposited on (111)-oriented silicon substrate by ultrasonic spraying pyrolysis method. It was found the photocurrent approximately 3.9� 10 -7 A at a bias of 1 V and a photocurrent to dark current contrast ratio higher than around two orders of magnitude. The photodiodes exhibited two higher responsive regions denoted as A and B, respectively. Region A at wavelength from 400 nm to 700 nm was owing to ZnO film absorption occurring through the band-to-deep level, and region B at wave- length from 700 nm to 1000 nm was owing to Si substrate absorption occurring through the band edge.
{"title":"P-ZnO/n-Si Photodiodes Prepared by Ultrasonic Spraying Pyrolysis Method","authors":"Lung-Chien Chen, Chuncai Pan","doi":"10.2174/1874846500801010010","DOIUrl":"https://doi.org/10.2174/1874846500801010010","url":null,"abstract":"ZnO ultraviolet (UV)/visible photodiodes were fabricated. The N-In codoped p-type ZnO films were deposited on (111)-oriented silicon substrate by ultrasonic spraying pyrolysis method. It was found the photocurrent approximately 3.9� 10 -7 A at a bias of 1 V and a photocurrent to dark current contrast ratio higher than around two orders of magnitude. The photodiodes exhibited two higher responsive regions denoted as A and B, respectively. Region A at wavelength from 400 nm to 700 nm was owing to ZnO film absorption occurring through the band-to-deep level, and region B at wave- length from 700 nm to 1000 nm was owing to Si substrate absorption occurring through the band edge.","PeriodicalId":23072,"journal":{"name":"The Open Crystallography Journal","volume":"59 1 1","pages":"10-13"},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86415798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-05-06DOI: 10.2174/1874846500801010018
O. Danylyuk, F. Perret, A. Coleman, K. Suwińska
The solid-state structure of the complex para-sulphonato-calix(8)arene - dimethylammonium - dimethylfor- mamide shows the para-sulphonato-calix(8)arene anion in a pleated cone conformation with the inclusion of four di- methylammonium cations and the dimethylformamide positioned exo to the macrocycle.
{"title":"The Solid-State Complex of para-Sulphonato-Calix(8)Arene Anion with Dimethylammonium Cations","authors":"O. Danylyuk, F. Perret, A. Coleman, K. Suwińska","doi":"10.2174/1874846500801010018","DOIUrl":"https://doi.org/10.2174/1874846500801010018","url":null,"abstract":"The solid-state structure of the complex para-sulphonato-calix(8)arene - dimethylammonium - dimethylfor- mamide shows the para-sulphonato-calix(8)arene anion in a pleated cone conformation with the inclusion of four di- methylammonium cations and the dimethylformamide positioned exo to the macrocycle.","PeriodicalId":23072,"journal":{"name":"The Open Crystallography Journal","volume":"76 1","pages":"18-23"},"PeriodicalIF":0.0,"publicationDate":"2008-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79269118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-02-28DOI: 10.2174/1874846500801010001
S. Kar, H. Ryu, K. S. Bartwal
Undoped and doped LiNbO3 single crystals were grown by Czochralski technique. Comparative studies on these undoped, Cr doped, Mg doped, Mg:Cr codoped and Mg:Nd codoped LiNbO3 single crystals were carried out. Phase identification was done using powder XRD technique. The effect of doping and co-doping on crystalline perfection of these crystals was monitored using high resolution x-ray diffraction (HRXRD) technique. The diffraction curves (DCs) were recorded in symmetrical Bragg geometry for (006) diffracting planes using MoK 1 radiation. tant is co-doping with Mg or Zn at a level above 4.5 mol%, which inhibits photorefractive properties of the material. Another potential application of LiNbO3 is in Nd 3+ based compact diode-pumped self-frequency doubled lasers that emit green radiation, useful for applications in optical data storage, and excitation sources to replace ion gas lasers and pumping of parametric oscillators and amplifiers (10). The
{"title":"High Resolution XRD Studies on Mg, Cr and Nd Doped LiNbO3 Crystals","authors":"S. Kar, H. Ryu, K. S. Bartwal","doi":"10.2174/1874846500801010001","DOIUrl":"https://doi.org/10.2174/1874846500801010001","url":null,"abstract":"Undoped and doped LiNbO3 single crystals were grown by Czochralski technique. Comparative studies on these undoped, Cr doped, Mg doped, Mg:Cr codoped and Mg:Nd codoped LiNbO3 single crystals were carried out. Phase identification was done using powder XRD technique. The effect of doping and co-doping on crystalline perfection of these crystals was monitored using high resolution x-ray diffraction (HRXRD) technique. The diffraction curves (DCs) were recorded in symmetrical Bragg geometry for (006) diffracting planes using MoK 1 radiation. tant is co-doping with Mg or Zn at a level above 4.5 mol%, which inhibits photorefractive properties of the material. Another potential application of LiNbO3 is in Nd 3+ based compact diode-pumped self-frequency doubled lasers that emit green radiation, useful for applications in optical data storage, and excitation sources to replace ion gas lasers and pumping of parametric oscillators and amplifiers (10). The","PeriodicalId":23072,"journal":{"name":"The Open Crystallography Journal","volume":"39 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2008-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90637644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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