If your institution doesn’t have an institutional repository and if there is no relevant subject repository you can deposit your research output – this can be articles or datasets - in ZENODO, a repository hosted by CERN and available to all. Some journal archives are also harvested by OpenAIRE, so you might want to consider publishing your research with them.
You can use the OpenAIRE deposit service - check out the list of compatible repositories.
OpenAIRE uses data from the Directory of Open Access Repositories, OpenDOAR, and from the Registry of Research Data Repositories, Re3data. Overview of repositories can be found on ROAR, OpenDOAR, Re3data.
Go to the OpenAIRE helpdesk ”Ask a question” if you are having trouble finding the best suited repository for you.