1. Nanoscience and Nanotechnology Graduate ProgramFaculty of ScienceKing Mongkut's University of Technology ThonburiBangkok 10140Thailand
2. Department of Materials ScienceFaculty of ScienceKasetsart UniversityBangkok 10900Thailand
3. Integrated Nanotechnology Research CenterDepartment of PhysicsFaculty of ScienceKhonKaen UniversityKhonKaen 40002Thailand
4. Institute of Functional Nano & Soft Materials (FUNSOM)Jiangsu Key Laboratory for Carbon‐Based Functional Materials & DevicesSoochow University199 Ren‐Ai Road, Suzhou Industrial ParkSuzhouJiangsu 215123P. R. China
5. Helmholtz‐Zentrum Berlin für Materialien und Energie GmbHInstitut für Silizium‐PhotovoltaikKekuléstr. 512489 BerlinGermany