Advanced Material Concepts for Luminescent Solar Concentrators

Rowan, Brenda; Wilson, Lindsay; Richards, Bryce S.

doi:10.1109/jstqe.2008.920282

Cited by 278 publications

(187 citation statements)

References 80 publications

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“…In fact, there has been significant work over the last few years exploring the development of these types of devices because of their potential applications as coherent light sources suitable for integration in optoelectronic and disposable spectroscopic and sensing devices 30,31 , as well as its use as luminescent solar concentrators for energy-harvesting applications 32 . In this regard, the boranes might be a potential candidate, as chromophores in luminescent solar concentrators should have minimal reabsorption (large Stokes shifts), fluorescence quantum yields above 0.90 and high photostabilities 33 , requirements that are fulfilled by the fluorescent boron hydride, anti-B 18 H 22 . Therefore, as a proof-of-concept preliminary experiment to ascertain whether anti-B 18 H 22 could be incorporated into a solid matrix and maintain its fluorescence properties, a chloroform solution mixture of anti-B 18 H 22 and polystyrene was spin-coated onto a quartz substrate to render B540 nm-thick thin films (see Methods for preparation details).…”

Section: Resultsmentioning

confidence: 99%

A borane laser

et al. 2015

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Emission from electronically excited species forms the basis for an important class of light sources-lasers. So far, commercially available solution-processed blue-emitting laser materials are based on organic compounds or semiconductor nanocrystals that have significant limitations: either low solubility, low chemical-and/or photo-stability and/or uncompetitive prices. Here we report a novel and competitive alternative to these existing laser materials that is based on boron hydrides, inorganic cluster compounds with a rich and diverse chemistry. We demonstrate that solutions of the borane anti-B 18 H 22 show, under pulsed excitation, blue laser emission at 406 nm with an efficiency (ratio of output/input energies) of 9.5%, and a photostability superior to many of the commercially available state-of-the-art blue laser dyes. This demonstration opens the doors for the development of a whole new class of laser materials based on a previously untapped resource for laser technology-the boranes.

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Section: Resultsmentioning

confidence: 99%

A borane laser

et al. 2015

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“…For example, visible emitting core-shell (CdSe/ZnS) QDs have demonstrated fluorescence quantum yield up to 84% [10] and NIRemitting PbS quantum dots in the range of 12%-81% [11]. However, conversion efficiency of QDSCs developed to date [12][13][14][15] has been limited, firstly by, the low fluorescence quantum yield of the commercially available visible-emitting QDs [16] and NIR-emitting QDs [17,18]. Secondly, the devices suffer from re-absorption losses at higher concentrations of QDs [19][20][21] due to significant, or even in some cases total, overlap of the absorption and primary emission spectra.…”

Section: Quantum Dot Solar Concentrators (Qdsc)mentioning

confidence: 99%

Enhanced quantum dot emission for luminescent solar concentrators using plasmonic interaction

Chandra¹,

Doran²,

McCormack

et al. 2012

Solar Energy Materials and Solar Cells

106

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a b s t r a c tPlasmonic excitation enhanced fluorescence of CdSe/ZnS core-shell quantum dots (QDs) in the presence of Au nanoparticles (NPs) has been studied for application in quantum dot solar concentrator (QDSC) devices. We observe that there is an optimal concentration of Au NPs that gives a maximum 53% fluorescence emission enhancement for the particular QD/Au NP composite studied. The optimal concentration depends on the coupling and spacing between neighboring QDs and Au NPs. We show the continuous transition from fluorescence enhancement to quenching, depending on Au NP concentration. The locally enhanced electromagnetic field induced by the surface plasmon resonance in the Au NPs leads to an increased excitation rate for the QDs. This is evidenced by excitation wavelength dependent fluorescence enhancement, where the locally enhanced field around the Au NPs is more pronounced close to the surface plasmon resonance (SPR) wavelength. However, at higher concentrations of Au NPs non-radiative energy transfer from the QDs to the Au NPs particles leads to a decrease of the emission, which is confirmed by detection of both a double exponential lifetime decay in, and a decrease in the lifetime of the QDs. The overall fluorescence emission enhancement depends on these competing effects; increased excitation rate and non-radiative energy transfer.

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“…Major obstacles to be overcome are: limited stability of the luminescent species, high self-absorption, and poor knowledge of the parameters governing the efficiency 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 (Rowan et al, 2008). The lack of standard methods to quantify those parameters is a significant limitation in LSC development.…”

Section: Introductionmentioning

confidence: 99%