Issue 21, 2016

Cost-effective solar concentrators based on red fluorescent Zn(ii)–salicylaldiminato complex

Abstract

Sunlight concentration is a promising path to cost-effective photovoltaic (PV) technologies. Compared to standard concentrators based on geometrical optics, luminescent solar concentrators (LSCs) appear to be viable and convenient alternatives because sunlight concentration to PV occurs with diffuse light and there is no need for sun tracking or cooling apparatuses. In this study, we report on the optical efficiencies of luminescent solar concentrators (LSCs) based on poly(methyl methacrylate) (PMMA) thin films doped with a red-emitting zinc(II) complex of the D–A–D type ligand N,N′-bis(2-hydroxy-1-naphthylidene)-diaminomaleonitrile (ZnL). ZnL is attractive for use in LSC owing to its easy and cheap synthesis. ZnL in PMMA shows an emission band at 624 nm, a Stokes shift of 34 nm and an average QY of 23%, data comparable to those recorded in solution and efficiently predicted by DFT calculations. A study of ZnL/PMMA LSC yields optical efficiencies of 7%, which is comparable to those based on the near unity QY fluorophores such as Lumogen Red. These performances were attributed to the higher emission red-shift and larger Stokes shift of ZnL that prevent the loss of efficiencies due to self-absorption and possibly circumvent its lower QY.

Graphical abstract: Cost-effective solar concentrators based on red fluorescent Zn(ii)–salicylaldiminato complex

Supplementary files

Article information

Article type
Paper
Submitted
02 Sad 2015
Accepted
26 Ama 2016
First published
29 Ama 2016

RSC Adv., 2016,6, 17474-17482

Author version available

Cost-effective solar concentrators based on red fluorescent Zn(II)–salicylaldiminato complex

P. Minei, E. Fanizza, A. M. Rodríguez, A. B. Muñoz-García, P. Cimino, M. Pavone and A. Pucci, RSC Adv., 2016, 6, 17474 DOI: 10.1039/C5RA23049G

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