The Sharc25 EU H2020 project aim is to push the efficiency of Cu(In,Ga)Se2 (CIGS) thin film solar cells to their maximum theoretical limit. Sharc25 consists in a large consortium to take under consideration both theoretical and experimental aspects. One of the strategies to achieve this goal is to improve and understand the CIGS absorber material deposited by co-evaporation.
The polycrystallinity of the CIGS absorber layer is one of the key elements which plays a crucial role in its efficiency. We combine here atom probe tomography (APT) (Fig. 2) and transmission electron microscopy (TEM) to study the distribution of alkali elements at sub-nanometer scale and with statistic relevancy. 3D APT atomic mapping of grain boundaries (GB) is here completed by systematic STEM-EDS analyses of GB all along the CIGS absorber layer (Fig. 1). Issues on samples preparation for APT and TEM will be also discussed.
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 641004
To cite this abstract:Celia Castro, Mohit Raghuwanshi, Philippe Pareige, Sébastien Duguay, Emmanuel Cadel, Wolfram Witte, Philip Jackson, Dimitrios Hariskos, Friedrich Kessler, Stephan Buecheler, Romain Carron, Enrico Avancini, Benjamin Bissig, Ayodhya Tiwari; Combining TEM and APT for a better understanding of super high efficiency Cu(In,Ga)Se2 thin film solar cells. The 16th European Microscopy Congress, Lyon, France. https://emc-proceedings.com/abstract/combining-tem-and-apt-for-a-better-understanding-of-super-high-efficiency-cuingase2-thin-film-solar-cells/. Accessed: June 5, 2020
EMC Abstracts - https://emc-proceedings.com/abstract/combining-tem-and-apt-for-a-better-understanding-of-super-high-efficiency-cuingase2-thin-film-solar-cells/