Application of NaYF4:Er3+ up-converting phosphors for enhanced near-infrared silicon solar cell response

Shalav, Avi; Richards, Bryce S.; Trupke, Thorsten; Krämer, Karl; Güdel, Hans‐Ulrich

doi:10.1063/1.1844592

Cited by 674 publications

(457 citation statements)

References 9 publications

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“…8 Another example is nearinfrared ͑NIR͒ UC by NaYF 4 doped with Er 3+ , which was applied to the rear of a silicon solar cell and shown to convert 1400-1500 nm NIR to photons that can be absorbed by the c-Si solar cell. 7,9 Contrary to UC, DC is a linear process. This makes it possible to obtain high conversion efficiencies, independent of the incident power and allows for the use of nonconcentrated sunlight.…”

Section: Introductionmentioning

confidence: 99%

Downconversion for solar cells in NaYF4:Er,Yb

Aarts

Ende

Meijerink

2009

Journal of Applied Physics

197

117

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Downconversion is a promising avenue to boost the efficiency of solar cells by absorbing one higher energy visible photon and emitting two lower energy near-infrared ͑NIR͒ photons. Here the efficiency of downconversion for the ͑Er 3+ ,Yb 3+ ͒ couple is investigated in NaYF 4 , a well-known host lattice for efficient upconversion with ͑Er 3+ ,Yb 3+ ͒. Analysis of the excitation and emission spectra for NaYF 4 doped with 1% Er 3+ and codoped with 0%, 5%, 10%, or 30% Yb 3+ show that visible to NIR downconversion is inefficient. Downconversion by the scheme based on the reverse of the upconversion process is hampered by fast multiphonon relaxation from the 4 F 7/2 level ͑the starting level for downconversion͒ to the 4 S 3/2 level. Energy transfer from the 4 S 3/2 level of Er 3+ to Yb 3+ is shown to be inefficient. Efficient downconversion from the 4 G 11/2 of Er 3+ level is observed, resulting in emission of two photons ͑one around 980 nm and one around 650 nm͒ after absorption of a single 380 nm photon.

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Section: Introductionmentioning

confidence: 99%

Downconversion for solar cells in NaYF4:Er,Yb

Aarts

Ende

Meijerink

2009

Journal of Applied Physics

197

117

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“…32 Upconversion materials are of particular interest for solar cell application because these materials utilize the IR region of the solar spectrum which is transmitted by solar cells. 15,[33][34][35][36][37][38] The emission spectra of the Gd 2 (MoO 4 ) 3 :Er 3+ /Yb 3+ upconversion nanophosphor upon excitation at a wavelength of 980 nm are shown in Fig. 4(a) and (b).…”

Section: Resultsmentioning

confidence: 99%

New insight into rare-earth doped gadolinium molybdate nanophosphor assisted broad spectral converters from UV to NIR for silicon solar cells

Kumar

Gupta

2015

RSC Adv.

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We have successfully synthesized rare-earth doped gadolinium molybdate Gd 2 (MoO 4 ) 3 :Re 3+ (Re 3+ ¼ Eu 3+ , Tb 3+ , Tm 3+ and Er 3+ /Yb 3+ ) nanophosphors for solar cell application as a broad spectral converter from the ultraviolet (UV) to the near infrared (NIR) regions in a single host lattice using a facile solid state reaction method. The gross structure, surface morphology and microstructure of these nanophosphors have been investigated by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission/high-resolution transmission electron microscopy (TEM/HRTEM) techniques , respectively. and Gd 2 (MoO 4 ) 3 :Tm 3+ nanophosphors demonstrate a strong green emission at 541 nm and a deep blue emission at 453 nm upon an excitation wavelength of 378 nm and 266 nm, respectively. Moreover, the upconversion characteristic of the Gd 2 (MoO 4 ) 3 :Er 3+ /Yb 3+ nanophosphor exhibits strong green emission at 545 nm and red emission at 657 nm corresponding to 4 S 3/2 -4 I 15/2 and 4 F 9/2 -4 I 15/2 transitions respectively. Furthermore, the Gd 2 (MoO 4 ) 3 :Er 3+ /Yb 3+ upconversion nanophosphor emits in the NIR spectrum region at 994 nm upon a 980 nm excitation wavelength. Hence, the obtained PL emission results with a lifetime in milliseconds reveal that these nanophosphors could be futuristic promising broad spectral converter phosphors which may possibly integrate with the next-generation Si-solar cell to enhance the efficiency of the cell.

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“…3. 21 The Er 3þ ion at 4 subsequently absorbs one photon and jumps to the 4 F 9/2 level, thus the enhanced population of the 4 F 9/2 state is of benefit of the red UC emission. It indicates that the emission colors can be easily tuned by adjusting the concentration of Yb 3þ ion.…”

Section: Resultsmentioning

confidence: 99%

“…[1][2][3][4] In recent years, much interest has been focused on multicolor tunability of UC emission to meet the requirements of these applications. Owing to their abundant ladder-like energy levels, trivalent lanthanide ions, such as Er 3þ , Tm 3þ , Eu 3þ , and Pr 3þ , have been extensively studied as activator ions for UC processes.…”

Section: Introductionmentioning

confidence: 99%

Color-tunable upconversion luminescence of Yb3+, Er3+, and Tm3+ tri-doped ferroelectric BaTiO3 materials

Yang

Hao

2013

Journal of Applied Physics

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Tunable upconversion (UC) multicolor luminescence is observed from Yb 3þ , Er 3þ , and Tm 3þ tri-doped ferroelectric BaTiO 3 (BTO) materials. By control of dopant concentrations, the lanthanide-doped BTO powders are capable of generating various UC spectra and color tunability. A white-light emission is achieved through an optimal design. Strong UC luminescence is also observed in the lanthanide-doped BTO thin-films grown on Pt/TiO 2 /SiO 2 /Si substrate, which can retain well-defined hysteresis loops with a remnant polarization (2P r ) of 17.8 lC/cm 2 . These findings open the possibility of lanthanide-doped BTO as multifunctional materials, in which both luminescent and ferroelectric properties co-exist. V C 2013 AIP Publishing LLC.

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Application of NaYF4:Er3+ up-converting phosphors for enhanced near-infrared silicon solar cell response

Cited by 674 publications

References 9 publications

Downconversion for solar cells in NaYF4:Er,Yb

Downconversion for solar cells in NaYF4:Er,Yb

New insight into rare-earth doped gadolinium molybdate nanophosphor assisted broad spectral converters from UV to NIR for silicon solar cells

Color-tunable upconversion luminescence of Yb3+, Er3+, and Tm3+ tri-doped ferroelectric BaTiO3 materials

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