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Quantum efficiency measurements of down-shifting using silicon nanocrystals for photovoltaic applications

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10 Author(s)
Sacks, J. ; McMaster Univ., Hamilton, ON, Canada ; Savidge, R.M. ; Gabr, A. ; Walker, A.
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Silicon nanocrystal (Si-NC) luminescent down-shifting materials for photovoltaic (PV) applications were fabricated by ion implantation and plasma-enhanced chemical vapor deposition (PECVD). The absolute optical conversion efficiency of the Si-NC-emitted photoluminescence was measured using conventional methods, and an optical set-up involving an integrating sphere. Modeling shows that down-shifting the light incident on a single-junction silicon cell (SJSC) can improve the cell performance if the optical conversion efficiency is sufficiently high. The measured conversion efficiency of the Si-NCs in a fused silica host was found to range from 0.8% to 1.84% and was compared with the efficiency required to maintain the performance of a SJSC.

Published in:

Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE

Date of Conference:

3-8 June 2012