Fourier formalism for relativistic axion-photon conversion with astrophysical applications

By mixing two infrared radiations near 1 μm in a 47-mm-long GaSe crystal, we efficiently generated a monochromatic radiation which has frequency tunability from 4.51 THz down to 53 GHz. The highest peak power produced by us is 389 W at 203 μm (1.48 THz), which corresponds to the photon conversion efficiency of 19% (the power conversion efficiency of 0.098%).

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SYNTHESIS OF THIN FILM OF TiO2 ON GRAPHITE SUBSTRATE BY CHEMICAL BATH DEPOSITION

Indonesian Journal of Chemistry ◽

10.22146/ijc.21746 ◽

2010 ◽

Vol 6 (2) ◽

pp. 121-126 ◽

Cited By ~ 2

Author(s):

Fitria Rahmawati ◽

Sayekti Wahyuningsih ◽

Pamularsih A.W

Keyword(s):

Thin Film ◽

Chemical Bath Deposition ◽

Surfactant Concentration ◽

High Efficiency ◽

Anatase Phase ◽

Film Surface ◽

Optical Microscope ◽

Graphite Substrate ◽

Thin Film Surface ◽

Photon Conversion

Thin film of TiO2 on graphite substrat has been prepared by means of chemical bath deposition. Cetyltrimethylammonium Bromide served as linking agent of synthesized TiO2 to graphite substrate.The optical microscope and Scanning Electron Microscope (SEM) indicate that surfactant concentration affects the pore morphology of thin film Surface Area Analysis (SAA) of thin film indicated that the pore of thin film included in mesopore category. The anatase phase of TiO2 quantity arised as the surfactant concentration increase, gave high efficiency of induced photon conversion to current efficiency (% IPCE). Keywords: thin film, TiO2, deposition, graphite

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Charge generation performance enhancement by size-dependent Cu2GeSe3quantum dot-sensitized solar cells

Functional Materials Letters ◽

10.1142/s179360471850090x ◽

2019 ◽

Vol 12 (01) ◽

pp. 1850090

Author(s):

Zhou Liu ◽

Zhuoyin Peng ◽

Jianlin Chen ◽

Wei Li ◽

Jian Chen ◽

...

Keyword(s):

Quantum Dots ◽

Solar Cells ◽

Quantum Dot ◽

Conversion Efficiency ◽

Performance Enhancement ◽

Photovoltaic Performance ◽

Charge Generation ◽

Transfer Property ◽

Photon Conversion ◽

Sensitized Solar Cells

Cu2GeSe3 quantum dot is introduced to instead of non-toxic CuInSe2 as a sensitizer for solar cells, which is employed to enhance the photovoltaic performance. Cu2GeSe3 quantum dots with various sizes are prepared by thermolysis process, which are employed for the fabrication of quantum dot-sensitized solar cells (QDSSC) according to assembly linking process. The optical absorption properties of the Cu2GeSe3 quantum dot-sensitized photo-electrodes have been obviously enhanced by the size optimization of quantum dots, which are better than that of CuInSe2-based photo-electrodes. Due to the balance on the deposition quantity and charge transfer property of the quantum dots, 3.9[Formula: see text]nm-sized Cu2GeSe3 QDSSC exhibits the highest current density value and incident photon conversion efficiency response, which result in a higher photovoltaic conversion efficiency than that of CuInSe2 QDSSC. The modulation of Cu2GeSe3 QDs will further improve the performance of photovoltaic devices.

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Dependence of the characteristics of dye-sensitized solar cells on amount tetrapropylammonium iodide

«Узбекский физический журнал» ◽

10.52304/.v22i4.166 ◽

2019 ◽

Vol 22 (4) ◽

pp. 250-253

Author(s):

А.А. Abdukarimov ◽

R.G. Ikramov ◽

O.O. Mamatkarimov ◽

A.K. Arof

Keyword(s):

Solar Cell ◽

Polyethylene Oxide ◽

Fill Factor ◽

Ethylene Carbonate ◽

Salt Content ◽

Dye Sensitized Solar Cells ◽

Dye Sensitized Solar Cell ◽

Dye Sensitized ◽

Photon Conversion ◽

Sensitized Solar Cells

In this work, several liquid electrolytes (LE) have been prepared. The electrolytes contain tetrapropylammonium iodide (TPAI) salt with different salt content, propylene carbonate (PC), ethylene carbonate (EC), polyethylene oxide (PEO), dimethylformamide (DMF) and (I-/I3-) redox couple LE was used in the Dye-Sensitized Solar Cell (DSSC). DSSCs were fabricated and current density-voltage (J-V) characteristics measured. The highest incident photon conversion efficiency (IPCE) at 520 nm is 45.5% for DSSC with 0.25 g TPAI LE. At AM 1.5, DSSC with LE exhibits efficiency of 6.61% with Jsc= 18.69 mA cm-2, Voc= 0.68V and fill factor (FF) = 0.52.

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Photon Conversion and Interaction in a Quasi-Phase-Matched Microresonator

Physical Review Applied ◽

10.1103/physrevapplied.16.064004 ◽

2021 ◽

Vol 16 (6) ◽

Author(s):

Jia-Yang Chen ◽

Zhan Li ◽

Zhaohui Ma ◽

Chao Tang ◽

Heng Fan ◽

...

Keyword(s):

Photon Conversion

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Evaluation of the effective quantum efficiency of photon conversion layers placed on solar cells

Solar Energy Materials and Solar Cells ◽

10.1016/j.solmat.2014.09.009 ◽

2015 ◽

Vol 132 ◽

pp. 191-195 ◽

Cited By ~ 11

Author(s):

T. Fix ◽

G. Ferblantier ◽

H. Rinnert ◽

A. Slaoui

Keyword(s):

Solar Cells ◽

Quantum Efficiency ◽

Photon Conversion

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Efficient fluorescence emission and photon conversion of LaOF:Eu3+ nanocrystals

Applied Physics Letters ◽

10.1063/1.3535983 ◽

2011 ◽

Vol 98 (1) ◽

pp. 011907 ◽

Cited By ~ 37

Author(s):

Dangli Gao ◽

Hairong Zheng ◽

Xiangyu Zhang ◽

Zhenxing Fu ◽

Zhenglong Zhang ◽

...

Keyword(s):

Fluorescence Emission ◽

Photon Conversion

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Axion-photon conversion in space and in low symmetrical dielectric crystals

Journal of Physics Conference Series ◽

10.1088/1742-6596/731/1/012007 ◽

2016 ◽

Vol 731 ◽

pp. 012007

Author(s):

V S Gorelik

Keyword(s):

Photon Conversion

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Review on the degradation and device physics of quantum dot solar cells

Modern Physics Letters B ◽

10.1142/s0217984915300082 ◽

2015 ◽

Vol 29 (Supplement 1) ◽

pp. 1530008 ◽

Cited By ~ 5

Author(s):

Elham N. Afshar ◽

Rasoul Rouhi ◽

Nima E. Gorji

Keyword(s):

Solar Cells ◽

Quantum Dot ◽

Band Gap ◽

Conversion Efficiency ◽

High Performance ◽

Energy Conversion Efficiency ◽

New Materials ◽

Quantum Dot Solar Cells ◽

Photon Conversion ◽

The Stability

Briefly, we reviewed the latest progress in energy conversion efficiency and degradation rate of the quantum dot (QD) solar cells. QDs are zero dimension nanoparticles with tunable size and accordingly tunable band gap. The maximum performance of the most advanced QD solar cells was reported to be around 10%. Nevertheless, majority of research groups do not investigate the stability of such devices. QDs are cheaper replacements for silicon or other thin film materials with a great potential to significantly increase the photon conversion efficiency via two ways: (i) creating multiple excitons by absorbing a single hot photon, and (ii) formation of intermediate bands (IBs) in the band gap of the background semiconductor that enables the absorption of low energy photons (two-step absorption of sub-band gap photons). Apart from low conversion efficiency, QD solar cells also suffer from instability under real operation and stress conditions. Strain, dislocations and variation in size of the dots (under pressure of the other layers) are the main degradation resources. While some new materials (i.e. perovskites) showed an acceptable high performance, the QD devices are still inefficient with an almost medium rate of 4% (2010) to 10% (2015).

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