New Solar Cell-Battery Hybrid Energy System: Integrating Organic Photovoltaics with Li-Ion and Na-Ion Technologies

Sebastian F. Hoefler, Roman Zettl, Daniel Knez, Georg Haberfehlner, Ferdinand Hofer, Thomas Rath, Gregor Trimmel, H. Martin R. Wilkening, Ilie Hanzu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A solar energy conversion system, an organic tandem solar cell, and an electrochemical energy storage system, an alkali metal-ion battery, were designed and implemented in an integrated hybrid photorechargeable battery for simultaneous energy conversion and storage. As a proof of concept, the integrated power pack was successfully realized in a three-terminal hybrid assembly featuring two negative and a joint positive electrode. The device can be directly charged upon illumination (photocharging) and discharged on the external load for many cycles. Aspects and requirements related to materials design, their specific properties, and the encapsulation issues are presented and discussed. Data on the compatibility of materials for solar cells with those used in batteries is presented for the first time. We also report on the efficiency of the solar cell part, the battery part, as well as the overall energy efficiency of the new system. From the behavior of this first of a kind device, we were able to derive its relevant characteristics that will guide future work in this highly application-oriented research field.

Original languageEnglish
Pages (from-to)19155-19168
Number of pages14
JournalACS Sustainable Chemistry and Engineering
Issue number51
Publication statusPublished - 28 Dec 2020


  • Energy efficiency
  • Integrated energy device
  • IoT power source
  • Li-ion and Na-ion batteries
  • Nonfullerene tandem solar cells
  • Organic photovoltaics
  • Photocharging
  • Solar battery

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

Fields of Expertise

  • Advanced Materials Science


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