Self-absorption in upconverter luminescent layers: Impact on quantum yield measurements and on designing optimized photovoltaic devices

Alessandro Boccolini, Jose Marques-Hueso, Bryce S. Richards

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This Letter details a theoretical investigation of self-absorption within an upconverter (UC) material, consisting of trivalent erbium (Er3-)-doped hexagonal sodium yttrium fluoride (?-NaYF4) and its implications on two experimental situations: the case of a quantum yield measurement, and on the effective performance in a UC-enhanced photovoltaic (PV) device. The study demonstrates that an optimization of the thickness is essential in order to reduce the effect of self-absorption and maximize the possible additional photocurrent that could be harvested. It also has been found that the external photoluminescence quantum yield (ePLQY) measured through an integrating sphere may result in an underestimation with respect to the performance that the UC material could achieve in a UC-PV device. Finally, it has been found the optimal thickness and the molar concentration of Er3- ions are inversely proportional, suggesting that an optimal number (1.3-2.9 1017) of Er3- ions should be contained within the UC layer.

Original languageEnglish
Pages (from-to)2904-2907
Number of pages4
JournalOptics Letters
Volume39
Issue number10
DOIs
Publication statusPublished - 15 May 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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