Thin-film luminescent solar concentrators (LSCs) have been proposed as a promising technolo-gy to reduce manufacturing and installation costs of photovoltaic (PV) systems and to simultaneously achieve a more efficient light management in PV devices (Debije et al., 2012). In order to achieve op-timal optical efficiency of devices, different promis-ing luminescent species have been synthesized and incorporated in high performance LSC devices, such as organic dyes, quantum dots and inorganic phos-phors/rare earth ions. However, a fundamental issue common to all these systems is the need of achieving high levels of solubility of the luminescent species in the host matrix material during processing in order to obtain high device efficiencies. In fact, poor dye sol-ubility may lead to the formation of dimers and ag-gregates that may cause drop of fluorescence quan-tum yield and device performance (Griffini et al., 2013). For this reason, appropriate choice of luminophore/host matrix combination is very im-portant for optimal LSC device operations. In this work, we report the preparation of fluorescent films based on PMMA doped with Ac/Tc host/guest cocrystals and their use in LSC devices (Fig. 1). The fluorescent polymeric films were obtained by spin coating a solution of PMMA containing Ac and Tc onto glass substrate. Different process parameters were analyzed and

Luminescent solar concentrators based on molecular cocrystals as novel fluorescent materials

GRIFFINI, GIANMARCO ENRICO;BRAMBILLA, LUIGI;CASTIGLIONI, CHIARA;DEL ZOPPO, MIRELLA ELVIRA ANGELA;LEVI, MARINELLA;TURRI, STEFANO
2014-01-01

Abstract

Thin-film luminescent solar concentrators (LSCs) have been proposed as a promising technolo-gy to reduce manufacturing and installation costs of photovoltaic (PV) systems and to simultaneously achieve a more efficient light management in PV devices (Debije et al., 2012). In order to achieve op-timal optical efficiency of devices, different promis-ing luminescent species have been synthesized and incorporated in high performance LSC devices, such as organic dyes, quantum dots and inorganic phos-phors/rare earth ions. However, a fundamental issue common to all these systems is the need of achieving high levels of solubility of the luminescent species in the host matrix material during processing in order to obtain high device efficiencies. In fact, poor dye sol-ubility may lead to the formation of dimers and ag-gregates that may cause drop of fluorescence quan-tum yield and device performance (Griffini et al., 2013). For this reason, appropriate choice of luminophore/host matrix combination is very im-portant for optimal LSC device operations. In this work, we report the preparation of fluorescent films based on PMMA doped with Ac/Tc host/guest cocrystals and their use in LSC devices (Fig. 1). The fluorescent polymeric films were obtained by spin coating a solution of PMMA containing Ac and Tc onto glass substrate. Different process parameters were analyzed and
2014
luminescent solar concentrators, photovoltaics, molecular cocrystals, anthracene, thin films, light management, energy
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1001904
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