UV-visible light-trapping structure of loosely packed submicrometer silica sphere for amorphous silicon solar cells

Wen Hsien Huang*, Jia Min Shieh, Fu-Ming Pan, Chang Hong Shen, Yu Chung Lien, Min An Tsai, Hao-Chung Kuo, Bau Tong Dai, Fu Liang Yang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

We synthesized a loosely packed submicrometer silica-sphere (LPSS) monolayer at room temperature and used the LPSS monolayer as the frontside light-trapping structure for n-i-p-type amorphous Si (a-Si) solar cells (SCs) to improve photovoltaic characteristics of the cells. The frontside LPSS monolayer plays a role as a UV-visible light scatter and a broadband antireflector; both can greatly improve the photoresponse of the underneath a-Si adsorbed layer. When the filling density of the LPSS layer is optimized to 65%, the enhancement in the photocurrent and conversion efficiency of the 120 °C-fabricated SCs is as high as ∼15% and ∼6.9%, respectively. Accordingly, such an LPSS light-trapping structure boosts efficiency of 120 °C-and 140 °C-fabricated cells to 7.3% and 8.5%, respectively. Since the LPSS structure has a graded refractive index profile, it behaves like a nearly omnidirectional antireflector, enhancing solar efficiency at a very large incident angle of illumination.

Original languageEnglish
Article number6213494
Pages (from-to)1036-1038
Number of pages3
JournalIEEE Electron Device Letters
Volume33
Issue number7
DOIs
StatePublished - 14 Jun 2012

Keywords

  • Omnidirectional reflector
  • photoresponse
  • silica sphere
  • UV-visible

Fingerprint Dive into the research topics of 'UV-visible light-trapping structure of loosely packed submicrometer silica sphere for amorphous silicon solar cells'. Together they form a unique fingerprint.

Cite this