Near-infrared quantum cutting in Eu 3+-Yb 3+ co-doped YAG through downconversion for silicon solar cell

M. K. Lau, Jianhua Hao

Research output: Journal article publicationConference articleAcademic researchpeer-review

22 Citations (Scopus)


Near-infrared (NIR) quantum cutting (QC) could provide a solution to minimise the heat loss due to the thermalisation of electron-hole pairs in solar cells by converting high-energy photons to low-energy photons matching with the greatest spectral response of silicon solar cell. Europium (Eu3+) and ytterbium (Yb3+) co-doped yttrium aluminium garnet (Y3Al5O12, YAG) can be used as QC phosphor with emission in both visible and NIR regions. In this study, upon the excitation at 394 nm, the5D0? 4f6transition of Eu3+is induced, the characteristic NIR emission located at 1030 nm due to the energy transfer between of2F5/2-2F7/2levels of Yb3+, is generated. The quantum efficiency (QE) was derived to be as high as 144%. The results showed the possibility for enhancing the photovoltaic conversion efficiency of silicon-based solar cell by modifying the absorption and utilising the energy in the UV-blue part of the solar spectrum.
Original languageEnglish
Pages (from-to)129-134
Number of pages6
JournalEnergy Procedia
Publication statusPublished - 8 May 2012
Event6th International Conference on Materials for Advanced Technologies, ICMAT 2011 - Singapore, Singapore
Duration: 26 Jun 20111 Jul 2011


  • Downconversion
  • Fluoresent and luminescent materials
  • Infrared spectroscopy
  • Rare-earth doped materials

ASJC Scopus subject areas

  • Energy(all)


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