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Du Q, Li B, Shi S, Zhang K, Zhang Y, Cheng S, Zhou Z, Liu F, Sun S, Sun Y, Liu W. Relationship between the intermediate phases of the sputtered Zn(O,S) buffer layer and the conduction band offset in Cd-free Cu(In,Ga)Se 2 solar cells. CrystEngComm 2020. [DOI: 10.1039/d0ce00216j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Intermediate phases are formed in Zn(O,S) thin films with different oxygen fluxes, affecting the device performance.
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Guc M, Hariskos D, Calvo-Barrio L, Jackson P, Oliva F, Pistor P, Perez-Rodriguez A, Izquierdo-Roca V. Resonant Raman scattering based approaches for the quantitative assessment of nanometric ZnMgO layers in high efficiency chalcogenide solar cells. Sci Rep 2017; 7:1144. [PMID: 28442796 PMCID: PMC5430671 DOI: 10.1038/s41598-017-01381-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 03/29/2017] [Indexed: 11/09/2022] Open
Abstract
This work reports a detailed resonant Raman scattering analysis of ZnMgO solid solution nanometric layers that are being developed for high efficiency chalcogenide solar cells. This includes layers with thicknesses below 100 nm and compositions corresponding to Zn/(Zn + Mg) content rations in the range between 0% and 30%. The vibrational characterization of the layers grown with different compositions and thicknesses has allowed deepening in the knowledge of the sensitivity of the different Raman spectral features on the characteristics of the layers, corroborating the viability of resonant Raman scattering based techniques for their non-destructive quantitative assessment. This has included a deeper analysis of different experimental approaches for the quantitative assessment of the layer thickness, based on (a) the analysis of the intensity of the ZnMgO main Raman peak; (b) the evaluation of the changes of the intensity of the main Raman peak from the subjacent layer located below the ZnMgO one; and (c) the study of the changes in the relative intensity of the first to second/third order ZnMgO peaks. In all these cases, the implications related to the presence of quantum confinement effects in the nanocrystalline layers grown with different thicknesses have been discussed and evaluated.
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Affiliation(s)
- Maxim Guc
- Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930, Sant Adria de Besos, Barcelona, Spain. .,Institute of Applied Physics, Academy of Sciences of Moldova, Academiei 5, Chisinau, MD 2028, Moldova.
| | - Dimitrios Hariskos
- Zentrum fur Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW), Stuttgart, Germany
| | - Lorenzo Calvo-Barrio
- Centres Cientifics i Tecnologics CCiTUB, Universitat de Barcelona, C. Lluis Sole I Sabares 1, 08028, Barcelona, Spain
| | - Philip Jackson
- Zentrum fur Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW), Stuttgart, Germany
| | - Florian Oliva
- Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930, Sant Adria de Besos, Barcelona, Spain
| | - Paul Pistor
- Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930, Sant Adria de Besos, Barcelona, Spain
| | - Alejandro Perez-Rodriguez
- Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930, Sant Adria de Besos, Barcelona, Spain.,INUB, Departament d'Electronica, Universitat de Barcelona, C. Martı i Franques 1, 08028, Barcelona, Spain
| | - Victor Izquierdo-Roca
- Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930, Sant Adria de Besos, Barcelona, Spain
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Pistor P, Ruiz A, Cabot A, Izquierdo-Roca V. Advanced Raman Spectroscopy of Methylammonium Lead Iodide: Development of a Non-destructive Characterisation Methodology. Sci Rep 2016; 6:35973. [PMID: 27786250 PMCID: PMC5081518 DOI: 10.1038/srep35973] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 09/28/2016] [Indexed: 11/29/2022] Open
Abstract
In recent years, there has been an impressively fast technological progress in the development of highly efficient lead halide perovskite solar cells. However, the stability of perovskite films and respective solar cells is still an open point of concern and calls for advanced characterization methods. In this work, we identify appropriate measurement conditions for a meaningful analysis of spin-coated absorber-grade perovskite thin films based on methylammonium (MA) lead iodide (MAPbI3) by Raman spectroscopy. The material under investigation and its derivates is the most commonly used for high efficiency devices in the literatures and has yielded working solar cell devices with efficiencies around 10% in our laboratory. We report highly detailed Raman spectra obtained with excitation at 532 nm and 633 nm and their deconvolution taking advantage of the simultaneous fitting of spectra obtained with varying excitation wavelengths. Finally, we propose a fast and contactless methodology based on Raman to probe composition variations and/or degradation of these perovskite thin films and discuss the potential of the presented technique as quality control and degradation monitoring tool in other organic-inorganic perovskite materials and complete solar cell devices.
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Affiliation(s)
- Paul Pistor
- IREC - Catalonia Institute for Energy Research, Sant Adrià de Besòs, Spain
| | - Alejandro Ruiz
- IREC - Catalonia Institute for Energy Research, Sant Adrià de Besòs, Spain
| | - Andreu Cabot
- IREC - Catalonia Institute for Energy Research, Sant Adrià de Besòs, Spain
- ICREA - Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
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