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High-Performance Near-Infrared Luminescent Solar Concentrators

High-Performance Near-Infrared Luminescent Solar Concentrators

Raquel Rondão, Ana R Frias, Sandra F H Correia, Lianshe Fu, Verónica de Zea Bermudez, Paulo S André, Rute A S Ferreira, Luís D Carlos

ACS Appl Mater Interfaces. 2017 Apr 12;9(14):12540-12546.

PMID: 28317371

Abstract:

Luminescent solar concentrators (LSCs) appear as candidates to enhance the performance of photovoltaic (PV) cells and contribute to reduce the size of PV systems, decreasing, therefore, the amount of material needed and thus the cost associated with energy conversion. One way to maximize the device performance is to explore near-infrared (NIR)-emitting centers, resonant with the maximum optical response of the most common Si-based PV cells. Nevertheless, very few examples in the literature demonstrate the feasibility of fabricating LSCs emitting in the NIR region. In this work, NIR-emitting LSCs are reported using silicon 2,3-naphthalocyanine bis(trihexylsilyloxide) (SiNc or NIR775) immobilized in an organic-inorganic tri-ureasil matrix (t-U(5000)). The photophysical properties of the SiNc dye incorporated into the tri-ureasil host closely resembled those of SiNc in tetrahydrofuran solution (an absolute emission quantum yield of ∼0.17 and a fluorescence lifetime of ∼3.6 ns). The LSC coupled to a Si-based PV device revealed an optical conversion efficiency of ∼1.5%, which is among the largest values known in the literature for NIR-emitting LSCs. The LSCs were posteriorly coupled to a Si-based commercial PV cell, and the synergy between the t-U(5000) and SiNc molecules enabled an effective increase in the external quantum efficiency of PV cells, exceeding 20% in the SiNc absorption region.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP92396888	Silicon 2,3-naphthalocyanine bis(trihexylsilyloxide)		92396-88-8	Price

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