High-Performance Near-Infrared Luminescent Solar Concentrators
authors Rondao, R; Frias, AR; Correia, SFH; Fu, LS; Bermudez, VD; Andre, PS; Ferreira, RAS; Carlos, LD
nationality International
journal ACS APPLIED MATERIALS & INTERFACES
author keywords luminescent solar concentrators; near infrared; optical conversion efficiency; organic-inorganic hybrids; 2,3-naphthalocyanine bis(trihexylsilyloxide)
keywords EMISSION QUANTUM YIELD; SILOXANE-BASED HYBRIDS; SILICON PHTHALOCYANINE; OPTICAL-PROPERTIES; NAPHTHALOCYANINE; EFFICIENCY; DOTS; AGGREGATION; FILMS; PHOTOVOLTAICS
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 triureasil 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 similar to 0.17 and a fluorescence lifetime of similar to 3.6 ns). The LSC coupled to a Si-based PV device revealed an optical conversion efficiency of similar to 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.
publisher AMER CHEMICAL SOC
issn 1944-8244
year published 2017
volume 9
issue 14
beginning page 12540
ending page 12546
digital object identifier (doi) 10.1021/acsami.7b02700
web of science category Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000399354100044

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