Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/218183
Title: Insights into interface and bulk defects in a high efficiency kesterite-based device
Author: Fonoll-Rubio, R.
Andrade-Arvizu, J.
Blanco Portals, Javier
Becerril, I.
Guc, M.
Saucedo, E.
Peiró Martínez, Francisca
Calvo Barrio, Lorenzo
Ritzer, M.
Schnohr, C.S.
Placidi, M.
Estradé Albiol, Sònia
Izquierdo‐Roca, Victor
Pérez Rodríguez, Alejandro
Keywords: Estructura cristal·lina (Sòlids)
Sofre
Microscòpia electrònica
Layer structure (Solids)
Sulfur
Electron microscopy
Issue Date: 24-Dec-2021
Publisher: Royal Society of Chemistry
Abstract: This work provides a detailed analysis of a high efficiency Cu2ZnSnSe4 device using a combination of advanced electron microscopy and spectroscopy techniques. In particular, a full picture of the different defects present at the interfaces of the device and in the bulk of the absorber is achieved through the combination of high resolution electron microscopy techniques with Raman, X-ray fluorescence and Auger spectroscopy measurements at the macro, micro and nano scales. The simultaneous investigation of the bulk and the interfaces allows assessing the impact of the defects found in each part of the device on its performance. Despite a good crystalline quality and homogeneous composition in the bulk, this work reports, for the first time, direct evidence of twinning defects in the bulk, of micro and nano-voids at the back interface and of grain-to-grain non-uniformities and dislocation defects at the front interface. These, together with other issues observed such as strong absorber thickness variations and a bilayer structure with small grains at the bottom, are shown to be the main factors limiting the performance of CZTSe devices. These results open the way to the identification of new solutions to further developing the kesterite technology and pushing it towards higher performances. Moreover, this study provides an example of how the advanced characterization of emergent multilayer-based devices can be employed to elucidate their main limitations.
Note: Versió postprint del document publicat a: https://doi.org/10.1039/D0EE02004D
It is part of: Energy & Environmental Science, 2021, vol. 14, p. 507-523
URI: https://hdl.handle.net/2445/218183
Related resource: https://doi.org/10.1039/D0EE02004D
ISSN: 1754-5692
Appears in Collections:Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)
Articles publicats en revistes (Institut de Nanociència i Nanotecnologia (IN2UB))

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