Ca1-x-yYbxPryF2+x+y solid solution powders as a promising materials for crystalline silicon solar energetics

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The single-phase solid solutions Ba 4 Y 3 F 17 :Yb:Eu with fluorite-type structure were synthesized by co-precipitation from aqueous solution technique. The average particle size was approximately 100 nm without agglomeration. The sensitized down-conversion luminescence of Yb 3+ ions was observed under 296 nm excitation. The quantum yield of Yb 3+ luminescence was found to reach avalue of 0.4 % for samples with Eu/Yb ratios of 0.1/1.0 and 0.1/10.0.

Section: Introductionmentioning

confidence: 99%

Near infrared down-conversion luminescence of Ba4Y3F17:Yb3+:Eu3+ nanoparticles under ultraviolet excitation

Kuznetsov¹,

Низамутдинов²,

Madirov³

et al. 2020

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“…Nanostructured materials are widely used for the development of next-generation solar cells (SCs) since they enable fabrication of high efficiency and low-cost devices which are promising for mass production of photovoltaic technologies [1,2]. Recently, a considerable interest is focused on inorganic-organic metal halide perovskite solar cells (PSCs) in which the record power conversion efficiency (PCE) exceeded 22 % [3] and reached 27.3 % in perovskite-silicon tandem solar cell [4].…”

Section: Introductionmentioning

confidence: 99%

Very wide-bandgap nanostructured metal oxide materials for perovskite solar cells

Larina¹,

Alexeeva²,

Almjasheva³

et al. 2019

Very wide-bandgap undoped and Y 2 O 3-doped ZrO 2 nanoparticles were synthesized and their structural, optical, morphological and energy characteristics were investigated. It was found that the bandgap value in ZrO 2 decreases with Y 2 O 3 doping. The developed materials were used for fabrication of nanostructured photoelectrodes for perovskite solar cells (PSCs) with the architecture of glass/FTO/ZrO 2-Y 2 O 3 /CH 3 NH 3 PbI 3 /spiro-MeOTAD/Au. The power conversion efficiency in the PSCs based on ZrO 2-Y 2 O 3 photoelectrodes was significantly higher than that for undoped ZrO 2 photoelectrodes. We have found that nanostructured layers, based on very wide-bandgap materials could efficiently transfer the injected electrons via a hopping transport mechanism.

“…Currently, nanoparticles are the center of attention of the research from completely different fields of science [1,2]. However, due to the size of nanoparticles their properties can significantly differ from the bulk materials of the same compound.…”

Section: Introductionmentioning

confidence: 99%

Spectral-kinetic properties of LaF3 nanoparticles doped with Ce3+ and Sm3+ ions after microwave treatment and in core-shell structure

Madirov¹,

Lukinova²,

Низамутдинов³

et al. 2018

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Crystalline LaF 3 :Sm 3+ and LaF 3 :Ce 3+ nanoparticles were fabricated via a co-precipitation method. The obtained nanoparticles were 15-20 nm and had good crystallinity. Spectral-kinetic properties of crystalline LaF 3 nanoparticles activated with 5 % Sm 3+ and 12 % Ce 3+ ions were studied. Various duration of the microwave treatment as well as core-shell structure were studied as possible ways to control quenching in the nanoparticles. In case of the LaF 3 :Sm 3+ nanoparticles, the additional microwave treatment increased the average luminescence lifetime by 6 % and addition of the LaF 3 shell increased it by 18 %. In case of the LaF 3 :Ce 3+ sample, microwave treatment increased the average lifetime by up to 20 %. The observed effects of varying the synthetic conditions and composite core-shell structure on luminescence properties of nanoparticles provide a means to manage the energy loss in the nanoparticles due to the quenching factors.