1. Department of Electronic EngineeringThe Chinese University of Hong Kong New Territories Hong Kong
2. Center for Computational Energy ResearchDepartment of Applied PhysicsEindhoven University of Technology 5600 MB Eindhoven the Netherlands
3. Computational Materials ScienceFaculty of Science and Technology and MESA+ Institute for NanotechnologyUniversity of Twente 7500 AE Enschede the Netherlands