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Bright thermal (blackbody) emission of visible light from LnO 2 (Ln = Pr, Tb), photoinduced by a NIR 980 nm laser

2018; Royal Society of Chemistry; Volume: 48; Issue: 8 Linguagem: Inglês

10.1039/c8dt04649b

1477-9234

Cícero Inácio da Silva Filho, Antonio L. Oliveira, S. C. F. Pereira, Gilberto F. de Sá, Leonis Lourenço da Luz, Severino Alves,

Quantum Dots Synthesis And Properties

The increasing demand for renewable energy has been promoting a rapid development of photovoltaic technologies. Given this, photoinduced thermal emission is being explored with the aim of improving solar cell performance by converting low-energy IR photons into visible light. Here, we report the light-induced blackbody emission from LnO2 (Ln = Pr and Tb) as a potential emitter for thermophotovoltaic applications. Lanthanide dioxides display broad IR absorption and a direct optical band gap of 1.49 (PrO2) and 1.51 eV (TbO2). These materials achieve a maximum temperature of ∼1500 K under a power density excitation of 160 W cm-2 and display a stable bright light emission. Thermal emission can be tuned from laser power density modulation.