Efficient light-trapping with quasi-periodic uniaxial nanowrinkles for thin-film silicon solar cells

Sanjay K. Ram*, Derese Desta, Rita Rizzoli, Bruno P. Falcao, Emil H. Eriksen, Michele Bellettato, Bjarke R. Jeppesen, Pia B. Jensen, Caterina Summonte, Rui N. Pereira, Arne Nylandsted Larsen, Peter Balling

*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Abstract

Self-organizing nanopatterns can enable economically competitive, industrially applicable light-harvesting platforms for thin-film solar cells. In this work, we present transparent solar cell substrates having quasi-periodic uniaxial nanowrinkle patterns with high optical haze values. The self-organized nanowrinkle template is created by controlled heat-shrinking of metal-deposited pre-stretched polystyrene sheets. A scalable UV-nanoimprinting method is used to transfer the nanopatterns to glass substrates on which single-junction hydrogenated amorphous silicon p-i-n solar cells are subsequently fabricated. The structural and optical analyses of the solar cell show that the nanowrinkle pattern is replicated throughout the solar cell structure leading to enhanced absorption of light. The efficient broadband light-trapping in the nanowrinkle solar cells results in very high 18.2 mA/cm(2) short-circuit current density and 9.5% energy-conversion efficiency, which respectively are 35.8% and 39.7% higher than the values obtained in flat-substrate solar cells. The cost-and time-efficient technique introduces a promising new approach to customizable light-management strategies in thin-film solar cells.

Original languageEnglish
JournalNano Energy
Volume35
Pages (from-to)341-349
Number of pages9
ISSN2211-2855
DOIs
Publication statusPublished - May 2017

Keywords

  • Silicon thin-film solar cells
  • Photovoltaic devices
  • Nanowrinkles
  • Light-management
  • Nanomolding
  • Finite element method modeling
  • PHOTON MANAGEMENT
  • PERFORMANCE
  • DEVICES
  • NANOSTRUCTURES
  • SUBSTRATE
  • WRINKLES
  • LAYER

Fingerprint

Dive into the research topics of 'Efficient light-trapping with quasi-periodic uniaxial nanowrinkles for thin-film silicon solar cells'. Together they form a unique fingerprint.

Cite this