1. Energy and Technology Policy Group, ETH Zurich, Zurich, Switzerland.
2. Materials and Device Engineering Group, ETH Zurich, Zurich, Switzerland.
3. Institute for Science, Technology and Policy, ETH Zurich, Zurich, Switzerland.
4. Laboratory for Energy Systems Analysis, Paul Scherrer Institute, Villigen, Switzerland.
5. HagerEnergy GmbH, Osnabrück, Germany.