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http://hdl.handle.net/1942/42731
Title: | Controlled Li Alloying by Post-Synthesis Electrochemical Treatment of Cu2ZnSn(S, Se)4 Absorbers for Solar Cells | Data Creator - person: | Moser, Simon Aribia, Abdessalem SCAFFIDI, Romain Gilshtein, Evgeniia BRAMMERTZ, Guy VERMANG, Bart Tiwari, Ayodhya N. Carron, Romain |
Data Creator - organization: | Empa UCLouvain imec Hasselt University |
Data Curator - person: | Moser, Simon | Data Curator - organization: | Empa UCLouvain imec Hasselt University |
Rights Holder - person: | Moser, Simon | Rights Holder - organization: | empa UCLouvain imec Hasselt University |
Publisher: | Zenodo | Issue Date: | 2023 | Abstract: | Li-alloying of Cu2ZnSn(S, Se)4 (CZTSSe) absorbers is widely accepted for its beneficial influence on the performance of CZTSSe-based thin film solar cells. Given the degraded morphology characteristic of absorbers synthesized in the presence of excess Li concentrations, it is speculated that Li may be best incorporated into the absorber after synthesis. Here, we report an innovative method to add Li to synthesized CZTSSe by an electrochemical treatment using a liquid electrolyte. Our approach decouples Li addition from absorber synthesis, allowing one to possibly overcome morphology issues associated with high Li concentration. We show that Li is thereby transferred to the absorber and is incorporated into the crystal lattice. The resulting Li concentration in the absorber can be easily controlled by the treatment parameters. Using liquid electrolytes allows a straightforward disassembly of the lithiation setup and hence the fabrication of solar cells after electrochemical treatment. Electrochemically lithiated solar cells reached power conversion efficiencies of up to 9.0%. Further optimization of this innovative method is required to reduce expected interface issues resulting from the electrochemical treatment to demonstrate a gain in the power conversion efficiency of the CZTSSe solar cells. Finally, our results indicate strong lateral Li diffusion, which deserves further investigation. Moreover, the method could be transferred to other material systems, such as Cu(In, Ga)Se2 (CIGS), and adapted to treat layers with other alkali elements such as Na. | Research Discipline: | Engineering and technology > Electrical and electronic engineering > Sensors, biosensors and smart sensors > Photodetectors, optical sensors and solar cells (02020902) | Keywords: | Absorption;Diffraction;Electrical conductivity;Lattices;Lithiation | DOI: | 10.5281/zenodo.8134309 | Link to publication/dataset: | https://zenodo.org/doi/10.5281/zenodo.8134309 | Source: | Zenodo. 10.5281/zenodo.8134309 https://zenodo.org/doi/10.5281/zenodo.8134309 | Publications related to the dataset: | 10.1021/acsaem.3c02483 | License: | Creative Commons Attribution 4.0 International (CC-BY-4.0) | Access Rights: | Open Access | Version: | 1.0 | Category: | DS | Type: | Dataset |
Appears in Collections: | Datasets |
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