Light trapping and carrier lifetime improvements of si solar cells by pyramid/groove hierarchical structures

Jr-Hau He*, Tzu Yin Lin, Hsin Ping Wang, An Cheng Li

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The textured surface of silicon wafer plays an important role in solar cell to reduce surface reflection, enhance light trapping and thereby improve conversion efficiency. Conventionally, the microstructures are usually achieved in commercial solar cells by isotropic and anisotropic wet etching. However, these structures still reflect about 14% incident light. In contrast, the nanostructures can suppress the reflectance as low as 5% but they easily cause the low carrier lifetime.To break the trade-off between low reflectance and high carrier lifetime for boosting the conversion efficiency of the solar cells, this study combines isotropic and anisotropic wet etching methods in texturing silicon surface, making a hierarchical microstructure consisting of grooves and pyramids and improving the efficiency of the Heterojunction with Intrinsic Thin layer (HIT) solar cells to 12.47%.

Original languageEnglish (US)
Title of host publicationNanophotonics, Nanoelectronics and Nanosensor, N3 2013
StatePublished - Nov 21 2013
EventNanophotonics, Nanoelectronics and Nanosensor, N3 2013 - Wuhan, China
Duration: May 25 2013May 26 2013

Publication series

NameNanophotonics, Nanoelectronics and Nanosensor, N3 2013


OtherNanophotonics, Nanoelectronics and Nanosensor, N3 2013

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

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