Up-and down-conversion materials for photovoltaic devices

Bryce Sydney Richards, Aruna Ivaturi, Sean Kye Wallace MacDougall, Jose Marques-Hueso

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)


Up-conversion (UC) and down-conversion (DC) of sunlight are two possible routes for improving energy harvesting over the whole solar spectrum. Via such processes it could be possible to exceed the Shockley-Queisser limit for a single-junction photovoltaic (PV) device. The effect of adding DC and UC layers to the front and rear of a solar cell, respectively, is to modify the incident solar spectrum. One of the materials more extensively studied for these propose have been the lanthanides or rare-earth systems, due to the suitability of their discrete energy levels for photon conversion inside a wide variety of host materials. While high quantum yields of 200% have been demonstrated with DC materials, there remain several barriers to realising such a layer that is applicable to a solar cell. These are, firstly, weak absorption of the lanthanide ions and, secondly, the competing loss mechanism of non-radiative recombination. For UC, these two barriers still exist, however an additional challenge is the non-linear nature of the UC process, thus favouring operation under concentrated sunlight. In this paper, we review the application of UC and DC to PV, discussing the material systems used and optical characterisation.
Original languageEnglish
Title of host publicationPhotonics for Solar Energy Systems IV
ISBN (Print)9780819491305
Publication statusPublished - 1 Jun 2012
EventProc. SPIE 8438- Photonics for Solar Energy Systems IV - Brussels, Belgium
Duration: 16 Apr 201218 Apr 2012

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X


ConferenceProc. SPIE 8438- Photonics for Solar Energy Systems IV


Dive into the research topics of 'Up-and down-conversion materials for photovoltaic devices'. Together they form a unique fingerprint.

Cite this