Investigation near IR absorption in thin crystalline Si wafers with randomly etched nano-pillars

Autor: Suhaila Sepeai, Nurfarizza Surhada Mohd Nasir, Kamaruzzaman Sopian, Nurul Aqidah Mohd Sinin, Cheow Siu Leong, Saleem H. Zaidi
Rok vydání: 2017
Předmět:
Zdroj: AIP Conference Proceedings.
ISSN: 0094-243X
DOI: 10.1063/1.4982177
Popis: Significant research has been focused on optimizing efficiency of crystalline silicon solar cells with nanostructured surfaces. Light absorption is greatly enhanced by light trapping in nanostructures. The main focus of research work presented here is to enhance the broadband light absorption in randomly etched nano-pillar textures. The nano-pillars were formed through metal-assisted chemical etching (MACE) process with silver nanoparticles serving as the etch masks. Uniformly distributed nano-pillars (SiNPs) were fabricated using single step etch process. Nano-pillars were fabricated on thin (∼ 150 µm) c-Si substrates by immersion into an aqueous solution of HF, AgNO3, and H2O2. The nano-pillars morphology and optical response were characterized with Scanning Electron Microscope (SEM), Atomic Force Microscopy (AFM), and near IR transmission. The performance of growth nano-pillars on as-cut (without saw damage removal process) and planar substrate (with saw damage removed) was evaluated. Typical dimension...
Databáze: OpenAIRE