A systematic first-principles investigation of the structural, electronic, optical, thermodynamic and transport properties of lead-free pyrochlore oxides Q<sub>2</sub>Sb<sub>2</sub>O<sub>7</sub> (Q= Be, Ca, Sr) for low-Cost energy applications
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Abbas, Zeesham | - |
dc.contributor.author | Fatima, Kisa | - |
dc.contributor.author | Mirza, Shafaat Hussain | - |
dc.contributor.author | Raza, Hafiz Hamid | - |
dc.contributor.author | Shaikh, Shoyebmohamad F. | - |
dc.contributor.author | Parveen, Amna | - |
dc.date.accessioned | 2024-06-21T14:30:25Z | - |
dc.date.available | 2024-06-21T14:30:25Z | - |
dc.date.issued | 2024-07 | - |
dc.identifier.issn | 0022-3697 | - |
dc.identifier.issn | 1879-2553 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/91601 | - |
dc.description.abstract | A systematic study has been performed on structural, optical and thermophysical properties of newly designed pyrochlore oxides Q(2)Sb(2)O(7) (Q = Be, Ca, Sr) employing FP-LAPW based first-principles calculations. The GGA approach was used to treat exchange and correlation potentials. The investigated E-V plots reveals that Sr2Sb2O7 is the most stable structure compared to Be2Sb2O7/Ca2Sb2O7. A direct energy bandgap of 0.29 eV is evident from band structure plot of Be2Sb2O7, however, Ca2Sb2O7/Sr2Sb2O7 possess indirect energy bandgaps of magnitude 1.47/1.467 eV. The studied materials show maximum absorption of incoming photons in near UV region as shown in epsilon(2)(omega) plots, however, considerable absorption in visible region is also present. Ca2Sb2O7/Sr2Sb2O7 are effective optical material with a n(omega) value between 1.0 and 2.0. Optical properties of pyrochlore oxides reveal that these materials are potential candidates for shielding materials in upper UV region. A photon reflection of up to 60% is evident from the R(omega) in UV region, however, in IR and visible regions, the reflectance is negligible. Based on calculated values of Seebeck coefficient (S), we can state that Be2Sb2O7 is n-type semiconductor whereas Ca2Sb2O7/Sr2Sb2O7 are p-type semiconductors. The most effective thermoelectric material among Q(2)Sb(2)O(7) (Q = Be, Ca, Sr) is Ca2Sb2O7 as its ZT value is highest (similar to 1.05) in the entire temperature range. Thermodynamic properties of Q(2)Sb(2)O(7) (Q = Be, Ca, Sr) are also evaluated to check dynamical stability and appropriateness of these materials in thermal applications. The investigated outcomes show that these pyrochlore oxides are potential candidates for thermoelectric and optoelectronic device applications. | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | A systematic first-principles investigation of the structural, electronic, optical, thermodynamic and transport properties of lead-free pyrochlore oxides Q<sub>2</sub>Sb<sub>2</sub>O<sub>7</sub> (Q= Be, Ca, Sr) for low-Cost energy applications | - |
dc.type | Article | - |
dc.identifier.wosid | 001222501900001 | - |
dc.identifier.doi | 10.1016/j.jpcs.2024.111950 | - |
dc.identifier.bibliographicCitation | JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, v.190 | - |
dc.description.isOpenAccess | N | - |
dc.identifier.scopusid | 2-s2.0-85187798003 | - |
dc.citation.title | JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | - |
dc.citation.volume | 190 | - |
dc.type.docType | Article | - |
dc.publisher.location | 영국 | - |
dc.subject.keywordAuthor | FP-LAPW | - |
dc.subject.keywordAuthor | Pyrochlore oxides | - |
dc.subject.keywordAuthor | Optoelectronic properties | - |
dc.subject.keywordAuthor | Elastic properties | - |
dc.subject.keywordAuthor | Phonon | - |
dc.subject.keywordAuthor | Thermodynamic properties | - |
dc.subject.keywordAuthor | Transport properties | - |
dc.subject.keywordPlus | IRON-OXIDE | - |
dc.subject.keywordPlus | WATER | - |
dc.subject.keywordPlus | BI2SN2O7 | - |
dc.subject.keywordPlus | BIVO4 | - |
dc.subject.keywordPlus | NANOSTRUCTURES | - |
dc.subject.keywordPlus | TEMPERATURE | - |
dc.subject.keywordPlus | CRYSTALS | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | SB(III) | - |
dc.subject.keywordPlus | SOLIDS | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Condensed Matter | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
1342, Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do, Republic of Korea(13120)031-750-5114
COPYRIGHT 2020 Gachon University All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.