Towards high-efficiency multi-junction solar cells with biologically inspired nanosurfaces

Pei-Chen Yu*, Meng Yih Chiu, Chia Hua Chang, Chung Yu Hong, Yu Lin Tsai, Hau Vei Han, Yu Rue Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


Multi-junction solar cells offer extremely high power conversion efficiency with minimal semiconductor material usage, and hence are promising for large-scale electricity generation. However, suppressing optical reflection in the UV regime is particularly challenging due to the lack of adequate dielectric materials. In this work, bio-inspired antireflective structures are demonstrated on a monolithically grown Ga0.5In0.5P/In0.01Ga0.99As/Ge triple-junction solar cell, which overcome the limited optical response of reference devices. The fabricated device also exhibits omni-directional enhancement of photocurrent and power conversion efficiency, offering a viable solution to concentrated illumination with large angles of incidence. A comprehensive design scheme is further developed to tailor the reflectance spectrum for maximum photocurrent output of tandem cells.

Original languageEnglish
Pages (from-to)300-307
Number of pages8
JournalProgress in Photovoltaics: Research and Applications
Issue number3
StatePublished - 1 Mar 2014


  • biomimetic nanostructures
  • photovoltaic
  • solar cells
  • sub-wavelength structures

Fingerprint Dive into the research topics of 'Towards high-efficiency multi-junction solar cells with biologically inspired nanosurfaces'. Together they form a unique fingerprint.

Cite this