Transport properties of perovskite-based stannate thin films of La-doped SrSnO3

IF 3.3 3区物理与天体物理 Q2 PHYSICS, CONDENSED MATTER

Superlattices and Microstructures Pub Date : 2021-10-01 DOI:10.1016/j.spmi.2021.107028

Y. Kumar , R. Kumar , K. Asokan , R. Meena , R.J. Choudhary , A.P. Singh

{"title":"Transport properties of perovskite-based stannate thin films of La-doped SrSnO3","authors":"Y. Kumar , R. Kumar , K. Asokan , R. Meena , R.J. Choudhary , A.P. Singh","doi":"10.1016/j.spmi.2021.107028","DOIUrl":null,"url":null,"abstract":"<div>SrSnO3 is a potential candidate for the perovskite-structured transparent electrode for many optoelectronic devices, especially for recently developed perovskite solar cells. La-doped SrSnO3 thin films were deposited using pulsed laser deposition on SrTiO3 (STO) substrate to study its structural and electrical properties. This study reveals that Lanthanum is a promising dopant for SrSnO3. Results of the Rutherford backscattering experiment showed that the oxygen vacancies are increasing with strain on La doping. X-ray diffraction measurements revealed the increase in strain with La-doping which was the reason for the increase in oxygen vacancies. The charge-neutrality was maintained within the films by the reduction of Sn4+ to Sn2+. The coexistence of two tin charge states (4+ and 2+) facilitated the hopping mechanism of the conduction. It was observed that La-doping reduced the electrical resistivity by 7 orders of magnitude with no significant change in its structure. Results obtained from X-ray absorption spectra are also consistent with these results.</div>","PeriodicalId":22044,"journal":{"name":"Superlattices and Microstructures","volume":"158 ","pages":"Article 107028"},"PeriodicalIF":3.3000,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.spmi.2021.107028","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Superlattices and Microstructures","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0749603621002263","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, CONDENSED MATTER","Score":null,"Total":0}

引用次数: 1

Abstract

SrSnO₃ is a potential candidate for the perovskite-structured transparent electrode for many optoelectronic devices, especially for recently developed perovskite solar cells. La-doped SrSnO₃ thin films were deposited using pulsed laser deposition on SrTiO₃ (STO) substrate to study its structural and electrical properties. This study reveals that Lanthanum is a promising dopant for SrSnO₃. Results of the Rutherford backscattering experiment showed that the oxygen vacancies are increasing with strain on La doping. X-ray diffraction measurements revealed the increase in strain with La-doping which was the reason for the increase in oxygen vacancies. The charge-neutrality was maintained within the films by the reduction of Sn⁴⁺ to Sn²⁺. The coexistence of two tin charge states (4+ and 2+) facilitated the hopping mechanism of the conduction. It was observed that La-doping reduced the electrical resistivity by 7 orders of magnitude with no significant change in its structure. Results obtained from X-ray absorption spectra are also consistent with these results.

查看原文本刊更多论文

镧掺杂SrSnO3钙钛矿基锡酸盐薄膜的输运性质

SrSnO3是许多光电器件中钙钛矿结构透明电极的潜在候选者，特别是最近开发的钙钛矿太阳能电池。采用脉冲激光沉积技术在SrTiO3 (STO)衬底上沉积la掺杂SrSnO3薄膜，研究其结构和电学性能。研究表明镧是一种很有前途的SrSnO3掺杂剂。卢瑟福后向散射实验结果表明，氧空位随着La掺杂应变的增加而增加。x射线衍射测量表明，la掺杂导致应变增加，这是导致氧空位增加的原因。通过Sn4+还原成Sn2+，薄膜内保持了电荷中性。两种锡电荷态(4+和2+)的共存促进了导电的跳变机制。结果表明，la掺杂使材料的电阻率降低了7个数量级，但其结构没有明显变化。从x射线吸收光谱得到的结果也与这些结果一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Superlattices and Microstructures 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.20%

发文量

审稿时长

2.8 months

期刊介绍： Superlattices and Microstructures has continued as Micro and Nanostructures. Micro and Nanostructures is a journal disseminating the science and technology of micro-structures and nano-structures in materials and their devices, including individual and collective use of semiconductors, metals and insulators for the exploitation of their unique properties. The journal hosts papers dealing with fundamental and applied experimental research as well as theoretical studies. Fields of interest, including emerging ones, cover: • Novel micro and nanostructures • Nanomaterials (nanowires, nanodots, 2D materials ) and devices • Synthetic heterostructures • Plasmonics • Micro and nano-defects in materials (semiconductor, metal and insulators) • Surfaces and interfaces of thin films In addition to Research Papers, the journal aims at publishing Topical Reviews providing insights into rapidly evolving or more mature fields. Written by leading researchers in their respective fields, those articles are commissioned by the Editorial Board. Formerly known as Superlattices and Microstructures, with a 2021 IF of 3.22 and 2021 CiteScore of 5.4