Harnessing cost-efficient printable semiconductor materials as near-infrared (NIR) emitters in light-emitting diodes (LEDs) is extremely attractive for sensing and diagnostics, telecommunications, and biomedical sciences. However, the most efficient NIR LEDs suitable for printable electronics rely on emissive materials containing precious transition metal ions (such as platinum), which have triggered concerns about their poor biocompatibility and sustainability. Here, we review and highlight the latest progress in NIR LEDs based on non-toxic and low-cost functional materials suitable for solution-processing deposition. Different approaches to achieve NIR emission from organic and hybrid materials are discussed, with particular focus on fluorescent and exciplex-forming host-guest systems, thermally activated delayed fluorescent molecules, aggregation-induced emission fluorophores, as well as lead-free perovskites. Alternative strategies leveraging photonic microcavity effects and surface plasmon resonances to enhance the emission of such materials in the NIR are also presented. Finally, an outlook for critical challenges and opportunities of non-toxic NIR LEDs is provided.

Guo, K., Righetto, M., Minotto, A., Zampetti, A., Cacialli, F. (2021). Non-toxic near-infrared light-emitting diodes. ISCIENCE, 24(6) [10.1016/j.isci.2021.102545].

Non-toxic near-infrared light-emitting diodes

Minotto, A;
2021

Abstract

Harnessing cost-efficient printable semiconductor materials as near-infrared (NIR) emitters in light-emitting diodes (LEDs) is extremely attractive for sensing and diagnostics, telecommunications, and biomedical sciences. However, the most efficient NIR LEDs suitable for printable electronics rely on emissive materials containing precious transition metal ions (such as platinum), which have triggered concerns about their poor biocompatibility and sustainability. Here, we review and highlight the latest progress in NIR LEDs based on non-toxic and low-cost functional materials suitable for solution-processing deposition. Different approaches to achieve NIR emission from organic and hybrid materials are discussed, with particular focus on fluorescent and exciplex-forming host-guest systems, thermally activated delayed fluorescent molecules, aggregation-induced emission fluorophores, as well as lead-free perovskites. Alternative strategies leveraging photonic microcavity effects and surface plasmon resonances to enhance the emission of such materials in the NIR are also presented. Finally, an outlook for critical challenges and opportunities of non-toxic NIR LEDs is provided.
Articolo in rivista - Review Essay
activated delayed fluorescence; aggregation-induced emission; efficiency roll-off; amplified spontaneous emission; exciton binding-energy; photothermal therapy; gold nanoparticles; halide perovskites; molecular design; oleds
English
2021
24
6
102545
open
Guo, K., Righetto, M., Minotto, A., Zampetti, A., Cacialli, F. (2021). Non-toxic near-infrared light-emitting diodes. ISCIENCE, 24(6) [10.1016/j.isci.2021.102545].
File in questo prodotto:
File Dimensione Formato  
10281-340951_VoR.pdf

accesso aperto

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Licenza: Creative Commons
Dimensione 5.41 MB
Formato Adobe PDF
5.41 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/340951
Citazioni
  • Scopus 19
  • ???jsp.display-item.citation.isi??? 20
Social impact