| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Engberg, Sara Lena Josefin
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2023Advances in the one-step synthesis of 2D and 3D sulfide materials grown by pulsed laser deposition assisted by a sulfur thermal crackercitations
- 2022Silver-substituted (Ag1-xCux)2ZnSnS4 solar cells from aprotic molecular inkscitations
- 2022Tuning the band gap of CdS in CZTS/CdS solar cells
- 2022The effect of soft-annealing on sputtered Cu2ZnSnS4 thin-film solar cellscitations
- 2022A facile strategy for the growth of high-quality tungsten disulfide crystals mediated by oxygen-deficient oxide precursorscitations
- 2022Solution-processed CZTS and its n-layers
- 2020Energy band alignment at the heterointerface between CdS and Ag-alloyed CZTScitations
- 2020Energy band alignment at the heterointerface between CdS and Ag-alloyed CZTScitations
- 2020Monolithic thin-film chalcogenide–silicon tandem solar cells enabled by a diffusion barriercitations
- 2020Persistent Double-Layer Formation in Kesterite Solar Cells: A Critical Reviewcitations
- 2020Persistent Double-Layer Formation in Kesterite Solar Cells: A Critical Reviewcitations
- 2019Thin films of CZTS and CZTO for solar cells produced by pulsed laser deposition
- 2019Thin films of CZTS and CZTO for solar cells produced by pulsed laser deposition
- 2018Liquid phase assisted grain growth in Cu2ZnSnS4 nanoparticle thin films by alkali element incorporationcitations
- 2017Investigation of Cu 2 ZnSnS 4 nanoparticles for thin-film solar cell applicationscitations
- 2017The effect of dopants on grain growth and PL in CZTS nanoparticle thin films for solar cell applications
- 2017Na-assisted grain growth in CZTS nanoparticle thin films for solar cell applications
- 2017Spray-coated ligand-free Cu2ZnSnS4 nanoparticle thin films
- 2017Investigation of Cu2ZnSnS4 nanoparticles for thin-film solar cell applicationscitations
- 2017Spray-coated Cu2ZnSnS4 thin films for large-scale photovoltaic applications
- 2016High frequency pulse anodising of magnetron sputtered Al–Zr and Al–Ti Coatingscitations
- 2016Cu2ZnSnS4 Nanoparticle Absorber Layers for Thin-Film Solar Cells
- 2016Synthesis of ligand-free CZTS nanoparticles via a facile hot injection routecitations
- 2015Optimized Packing Density of Large CZTS Nanoparticles Synthesized by Hot-injection for Thin Film Solar Cells.
- 2015Large CZTS Nanoparticles Synthesized by Hot-Injection for Thin Film Solar Cells.
- 2015Synthesis of large CZTSe nanoparticles through a two-step hot-injection methodcitations
- 2014Appearance of anodised aluminium: Effect of alloy composition and prior surface finishcitations
- 2014Annealing in sulfur of CZTS nanoparticles deposited through doctor blading
- 2014Study of Grain Growth of CZTS Nanoparticles Annealed in Sulfur Atmosphere
Places of action
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conferencepaper
Na-assisted grain growth in CZTS nanoparticle thin films for solar cell applications
Abstract
We have studied the effect of Na in Cu2ZnSnS4 nanoparticle thin films [1]. The as-synthesized CZTS nanoparticles were inherently ligand-free [2], which allows us to use of polar solvents, such as water and ethanol. Another advantage of these particles is that the user- and environmentally-friendly NaCl salt can be directly dissolved in controllable amounts. This further circumvents the need for later incorporation of dopants, or a ligand-exchange step to functionalize the surface of the nanoparticles. In addition, the homogeneous distribution of Na in the ink allows uniform grain growth within the deposited absorber layer. By including Na in the nanoparticle ink, micron-sized grains throughout the whole absorber are achieved after annealing in a sulfur atmosphere at 600°C. The absorber layer appeared to be of full density, and no closed porosity could be detected. In addition, the photoluminescence signal increased by a factor of 200 after Na-inclusion. Without Na, the grains were very difficult to sinter, the film was porous, and the photoluminescence was low. A concentration of Na/(Cu+Zn+Sn)=30% was necessary for the densification of the absorber, which is significantly higher than that used in other Na-doped CZTS systems. The annealed films were found to be of the desired Cu-poor and Zn-rich composition. We also found that a sulfidation temperature above 550°C was required. At 550°C, NaCl-crystals appeared on the surface of the thin films, suggesting an incomplete transformation of Na into the liquid phase Na2Sx-additive during sintering. At this temperature, grain growth was only detected in close proximity to the NaCl regions. It was also observed that the NaCl crystals could be easily removed by a quick water rinse, but that this treatment reduced the photoluminescence signal. This is relevant as it is customary to leave the absorber layer in a water-based solution after annealing before buffer layer deposition.<br/>