Up-conversion equivalent circuit to boost current in Si cells

Gavin Conibeer, Santosh Shrestha, Kai Yuen Chan, Shujuan Huang, Binesh Puthen-Veettil

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


Up-conversion for Si solar cells using Er phosphors has the twin problems of a very high concentration requirement and the very narrow bandwidth for absorption. An alternative is to use the equivalent circuit of an up-converter, two below bnadgap solar cells connected in series to pump an above band gap LED, as suggested by Trupke SOLMAT 2005, but not yet attempted experimentally. Results on the current enhancement in such devices are shown for absorption of below Si band gap light in long wavelength cells to pump a InGaAs LED so as to sensitise a Si solar cell.

Original languageEnglish
Title of host publicationNext Generation Technologies for Solar Energy Conversion VII
EditorsOleg V. Sulima, Gavin Conibeer
Place of PublicationBellingham, WA
Number of pages6
ISBN (Electronic)9781510602663
ISBN (Print)9781510602656
Publication statusPublished - 2016
Externally publishedYes
EventSPIE Optics + Photonics for Sustainable Energy: Next Generation Technologies for Solar Energy Conversion VII - San Diego, United States
Duration: 29 Aug 201631 Aug 2016

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X
ISSN (Electronic)1996-786X


ConferenceSPIE Optics + Photonics for Sustainable Energy
CountryUnited States
CitySan Diego


  • Up-conversion
  • equivalent circuit
  • LED

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