University Library

Gold Open Access

Through Gold Open Access, the author pays an article publication charge (APC) and the article is immediately freely available online for all to read, download and share.

Platinum Open Access

Platinum open access means that the publication is permanent and openly available to readers from the publisher's site (just as in gold OA) and that no article processing fees have to be paid by the authors (in contrast to gold OA). Thus, platinum open access articles are 100% free! Importantly, authors retain copyright of their work and allow it to be shared and reused, provided that it is correctly cited. All articles are published under the most flexible reuse standard – the CC BY-License.

Green Open Access

Self-archiving (Green Open Access) allows non-final versions to be hosted on a personal or institutional website or repository (e.g. KLUEDO). Submitted versions may be archived immediately (preprint) and accepted versions (with publisher layout) after an embargo period. The length of the embargo period differs among publishers.

Hybrid Open Access Journals

Hybrid journals are traditional subscription-based journals, which allow single articles to be made available in open access for a fee (“Open Choice”). The submission of articles to such journals cannot be funded by the publication fund.

Pros and Cons of Open Access


  • Free access to funded research results
    (end of double dipping)
  • Available for search engines
    (full texts without restrictions via Google and Co.)
  • Long-term availability of documents guaranteed via persistent Identifiers
  • Benefits of digital documents
    (save, copy, send, print allowed)
  • Fast and free access to scientific information
    (reachable to the entire interested public)
  • Better international and interdisciplinary cooperation
    (strengthening countries without extensive research funding)
  • More efficient research
    ("early advantage" availability before publication)
  • Improving the information supply
    (quick information about the current state of research)
  • Increased visibility and citation frequency of documents
    (better accessibility leads to higher citation frequency)


  • Quality concerns
    (fear of a bad reputation)
  • Discovery issues
    (little trust in the technical infrastructure)
  • Long-term archiving of documents
    (risk of "digital volatility")
  • Legal concerns
    (uncertainties regarding authorship and exploitation rights)
  • Financeability of the author pays model
    (significantly higher publication costs)
  • Concerns regarding the distribution of publications and conflicts of interest
    (questions about nationality, institutional pressure, ...)
  • Time spent
    (self-archiving vs. professional repositories)

Contact and individual advice

If you have any questions, please do not hesitate to contact us by e-mail and arrange an individual consultation appointment if required.

Open Access Representative

Please direct all inquiries by e-mail: openaccess(at)

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