Academic Journal
Switchable photovoltaic response in hexagonal LuMnO3 single crystals
| العنوان: | Switchable photovoltaic response in hexagonal LuMnO3 single crystals |
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| المؤلفون: | Sheng, Yunwei, Fina, Ignasi, Gospodinov, Marin, Fontcuberta, Josep |
| المساهمون: | Ministerio de Ciencia, Innovación y Universidades (España), Generalitat de Catalunya |
| بيانات النشر: | American Institute of Physics |
| سنة النشر: | 2021 |
| المجموعة: | Digital.CSIC (Consejo Superior de Investigaciones Científicas / Spanish National Research Council) |
| مصطلحات موضوعية: | Diffusion current, Photovoltaics, Short circuit, Photoconductivity, Thin films, Optical absorption, Ferroelectric materials, Dichroism, Schottky diodes |
| الوصف: | Hexagonal manganites, such as h-LuMnO3, are ferroelectric with its polar axis along the hexagonal axis and have a narrow electronic bandgap (≈ 1.5 eV). Using Pt electrodes, h LuMnO3 single crystals display a strong rectification, characteristic of a Schottky diode, and a large photoresponse. It is found that the short circuit photocurrent Jsc along the polar axis is modulated (up to 25 %) by the direction of the ferroelectric polarization P, leading to a short circuit photocurrent loop that mimics the ferroelectric polarization, and by polarization back switching. However, a non-switchable Jsc persists. Diffusion photocurrent is shown to dominate current-in-plane measurements and contributes to the non-switchable Jsc. This observation illustrates the dramatic role of the large optical absorption in hexagonal manganites. The accompanying optical dichroism shall challenge disentangling a genuine bulk photovoltaic response in h-LuMnO3 single crystal contributing to the non-switchable Jsc. Epitaxial thin films may offer a suitable alternative. ; Financial support from the Spanish Ministry of Science, Innovation and Universities, through the “Severo Ochoa” Programme for Centres of Excellence in R&D (FUNFUTURE CEX2019-000917-S), MAT2017-85232-R (AEI/FEDER, EU), and PID2019-107727RB-I00 (MINECO/FEDER, EU) projects and from Generalitat de Catalunya (No. 2017 SGR 1377) is acknowledged. I.F. acknowledges RyC Contract No. RYC-2017-22531. Project supported by a 2020 Leonardo Grant for Researchers and Cultural Creators, BBVA Foundation. Y.S is financially supported by China Scholarship Council (CSC) with No. 201806410010. The work of Y.S. has been done as a part of her Ph.D. program in Materials Science at Universitat Autònoma de Barcelona. A. Schankler and A. M. Rappe are acknowledged for the critical reading of the manuscript. ; Peer reviewed |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0003-6951 |
| Relation: | #PLACEHOLDER_PARENT_METADATA_VALUE#; info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CEX2019-000917-S; info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/MAT2017-85232-R; info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-107727RB-I00; Postprint; http://dx.doi.org/10.1063/5.0053379; Sí; Applied Physics Letters 118(23): 232902 (2021); http://hdl.handle.net/10261/243008; http://dx.doi.org/10.13039/501100002809 |
| DOI: | 10.13039/501100002809 |
| الاتاحة: | http://hdl.handle.net/10261/243008 https://doi.org/10.13039/501100002809 |
| Rights: | open |
| رقم الانضمام: | edsbas.775E9CC9 |
| قاعدة البيانات: | BASE |
| تدمد: | 00036951 |
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| DOI: | 10.13039/501100002809 |