quantum well solar cells and quantum dot concentrators
Characterization and performance analysis of bifacial solar cells and modules
... indoor measurement standard to characterise bifacial solar cells and modules This thesis focuses on characterisation and standardisation of bifacial solar cells and modules, and on performance ... bifacial solar cells and modules For conventional monofacial solar cells and modules, standards have been adopted to rate them in terms of output power and efficiency under STC 26 [96] These standards ... presented the challenges and difficulties in characterising bifacial solar cells and modules [32-34] For bifacial solar cells, most authors measure and report the front and rear side electrical...
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Characterization of high efficiency pseudo bilayer organic solar cells and
... 15 TYPES OF SOLAR CELLS 16 CRYSTALLINE SILICON SOLAR CELLS 17 AMORPHOUS SILICON SOLAR CELLS 19 DYE SENSITIZED SOLAR CELLS ... as dye sensitized solar cells, perovskite solar cells and organic solar cells There is a lot of research that is being carried out on them to increase their device efficiencies and life times Figure ... advantages with a-Si-H solar cells are that fabrication procedure is much simpler and cheaper when compared to crystalline silicon solar cells Apart from that, a-Si-H solar cells can absorb more...
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Design, construction and testing of an i v tester for thin film solar cells and mini modules
... consumption and the ability to fabricate the solar cells on inexpensive, large-area foreign substrates and to monolithically series-connect the fabricated solar cells [3] Thin-film solar cells are ... perimeter of the cells, and these effects should be considered 2.2 I-V measurement methods for solar cells Solar cells and modules are developed in a wide range of power level and conversion efficiencies ... simpler and more accurate But it should only be applied when comparing solar cells that have similar and comparable layout Very small cells may give higher J0 and lower RSH as recombination and contamination...
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Design, construction and testing of an i v tester for thin film solar cells and mini modules
... consumption and the ability to fabricate the solar cells on inexpensive, large-area foreign substrates and to monolithically series-connect the fabricated solar cells [3] Thin-film solar cells are ... perimeter of the cells, and these effects should be considered 2.2 I-V measurement methods for solar cells Solar cells and modules are developed in a wide range of power level and conversion efficiencies ... simpler and more accurate But it should only be applied when comparing solar cells that have similar and comparable layout Very small cells may give higher J0 and lower RSH as recombination and contamination...
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Báo cáo hóa học: " Impacts of Post-metallisation Processes on the Electrical and Photovoltaic Properties of Si Quantum Dot Solar Cells" potx
... 5:1762–1767 Fig Schematic diagram of an all-Si quantum dot super lattice tandem solar cell [2] 1763 a quartz substrate using magnetron co-sputtering of Si and quartz (SiO2) targets [9] Either a phosphorous ... mono-crystalline silicon solar cells, in a thin film solar cell it would be a clear demonstration that the electronic band gap of the nanostructured material is enhanced due to the quantum confinement ... Park, D Song, S Huang, Y.-H Cho, G Conibeer, M.A Green, Toward silicon quantum dot junction to realize all-silicon tandem solar cells Proceedings 22nd EU PVSEC, Milan, Italy, Sept 2007 10 X.J Hao,...
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Báo cáo hóa học: " Improved conversion efficiency of Ag2S quantum dot-sensitized solar cells based on TiO2 nanotubes with a ZnO recombination barrier layer" pdf
... plain TNT, Ag2S(n)/TNT, and Ag2S(n)/ZnO/TNT electrodes n = 2, 4, and Figure Energy diagram and dark current (a) Energy diagram of Ag2S-sensitized ZnO/TNT solar cells and (b) the dark current ... porous TiO2 solar cells J Photochem Photobiol A: Chem 2006, 181:306-313 Diguna LJ, Shen Q, Kobayashi J, Toyoda T: High efficiency of CdSe quantum- dot- sensitized TiO2 inverse opal solar cells Appl ... Nitrogen-doped and CdSe quantum- dot- sensitized nanocrystalline TiO2 films for solar energy conversion applications J Phys Chem C 2008, 112:1282-1292 10 Vogel R, Hoyer P, Weller H: Quantum- sized...
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Báo cáo hóa học: " Au Nanoparticles as Interfacial Layer for CdS Quantum Dot-sensitized Solar Cells" pdf
... FTO/TiO2/CdS and FTO/Au/ TiO2/CdS cells The IPCE is defined as the number of Fig I-V curves of FTO/TiO2/CdS and FTO/Au/TiO2/CdS cells Table Photovoltaic parameters of FTO/TiO2/CdS and FTO/Au/ TiO2/CdS cells ... FTO/TiO2/CdS and FTO/Au/TiO2/CdS cells are listed in Table It can be observed that the Isc, Voc and g have increased from 5.72 mAcm-2, 0.47 V and 0.86% for FTO/TiO2/CdS cell to 7.11 mAcm-2, 0.56 V and ... of the cells with and without the Au NP interfacial layer (named as FTO/TiO2/ CdS and FTO/Au/TiO2/CdS cells) The open circuit potential (Voc), short circuit current (Isc), fill factor (FF) and conversion...
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báo cáo khoa học: "Quantum dot-induced cell death involves Fas upregulation and lipid peroxidation in human neuroblastoma cells" pptx
... of FOXO3a, Fas ligand, and Bim, and induces cell apoptosis Int J Oncol 2006, 29(3):643-648 Maysinger D, Lovric J, Eisenberg A, Savic R: Fate of micelles and quantum dots in cells Eur J Pharm ... of cells treated as described above After 24 h treatment, media was removed and replaced with drug-free, serum-free media (500 µL /well) 50 µL of stock MTT (5 mg/mL) was added to each well and cells ... of dopaminemodified quantum dots and effects on biological systems Nat Mater 2006, 5(5):409-417 Samia AC, Dayal S, Burda C: Quantum dot- based energy transfer: perspectives and potential for applications...
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Dynamic study of highly efficient cds cdse quantum dot sensitized solar cells fabricated by electrodeposition
... CdSe Quantum Dot Sensitized Solar Cells Phys Chem Chem Phys 2010, 12, 2819–2821 González-Pedro, V.; Xu, X Q.; Mora-Ser o, I.; Bisquert, J Modeling High-Efficiency Quantum Dot Sensitized Solar Cells ... Recombination in Quantum Dot Sensitized Solar Cells Acc Chem Res 2009, 42, 1848–1857 Watson, D F Linker-Assisted Assembly and Interfacial Electron-Transfer Reactivity of Quantum Dot Substrate Architectures ... http://pubs.acs.org REFERENCES AND NOTES Rühle, S.; Shalom, M.; Zaban, A Quantum- Dot- Sensitized Solar Cells Chemphyschem 2010, 11, 2290–2304 Grätzel, M Photoelectrochemical Cells Nature 2001, 414, 338–344...
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Pin mặt trời sử dụng công nghệ giếng lượng tử ( quantum well solar cell)
... 900 Reflectivity (%) Internal quantum efficiency (%) 100 100 0 1000 1000 Wavelength (nm) Wavelength (nm) [3] D.C Johnson et al Solar Energy Materials and Solar Cells, 2005 Giải thích MQW DBR ... T=300K 0.8 0.7 he so hap thu phi tuyen 0.6 0.5 0.4 0.3 0.2 0.1 rong ho luong tu L(m) 10 -8 x 10 dothi 0.45 Sự phụ thuôc cua hệ số hâp thụ ̣ ̉ ́ song điên từ vao nhiêt độ T ́ ̣ ̀ ̣ E1 E2 ... trường ̣ ̀ ̣ 0.3 he so hap thu phi tuyen 0.25 0.2 0.15 0.1 L1
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synthesis and characterization of cdse-zns core-shell quantum dot
... 2.1.2 Quantum Confinement Quantum dots have a tunable bandgap due to a concept called quantum confinement To understand quantum confinement, we need to look at how energy bands work in atoms and ... QLEDs, quantum dots can be substituted for or used in conjunction with organic molecules in thin film, printable solar cells Another method for using quantum dots to harvest solar energy uses quantum ... create quantum dot based solar cells (a) metal-QD junction, (b) polymer-QD junction, (c) QD-dye sensitized solar cells Figure 7: Absorbance and fluorescence spectra of quantum dots (a-c) in...
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Báo cáo hóa học: " Improvement of performance of InAs quantum dot solar cell by inserting thin AlAs layers" doc
... Effects of size and shape on electronic states of quantum dots Phys Rev B 2006, 74:245331 Ngo CY, Yoon SF, Fan WJ, Chua SJ: Tuning InAs quantum dots for high areal density and wideband emission ... GaInP/GaInAs/Ge multijunction solar cells Appl Phys Lett 2007, 90:183516 McPheeters CO, Hill CJ, Lim SH, Derkacs D, Ting DZ, Yu ET: Improved performance of In(Ga)As quantum dot solar cells via light scattering ... enhanced by 6.15 and 2.75% for the devices with as-grown QDs and annealed QDs, respectively Comparing Figures and 3, one can see that the solar response spectra of samples C and D with annealed...
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báo cáo hóa học:" Hybrid polymer/ZnO solar cells sensitized by PbS quantum dots" pot
... MK: PbS and CdS quantum dot- sensitized solid-state solar cells: “old concepts, new results” Adv Func Mater 2009, 19:2735-2742 11 Robel I, Subramanian V, Kuno M, Kamat PV: Quantum dot solar cells ... self-assembled layers of CdS quantum dots Chem Commun 2002, 10:1030-1031 Lin SC, Lee YL, Chang CH, Shen YJ, Yang YM: Quantum- dot- sensitized solar cells: assembly of CdS -quantum- dots coupling techniques ... Kamat PV: Quantum dot sensitized solar cells A tale of two semiconductor nanocrystals: CdSe and CdTe Acs Nano 2009, 3:1467-1476 13 Plass R, Pelet S, Krueger J, Gratzel M, Bach U: Quantum dot sensitization...
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báo cáo hóa học:" Low-Cost Flexible Nano-Sulfide/Carbon Composite Counter Electrode for Quantum-Dot-Sensitized Solar Cell" docx
... high-efficiency quantum- dot- sensitized solar cells Conclusion Cu2S nanoparticles were deposited on the surface of graphite paper to obtain a composite counter electrode for CdS/CdSe-sensitized solar cell ... Cu(CH3COO)2 and 10 mM thiourea were dissolved in diethylene glycol (DEG) sequentially and transferred to Teflon autoclave Then, the annealed graphite paper was immersed and the autoclave was sealed and ... TiO2/CdS/CdSe/electrolyte interface (subscript 1) and series resistance (subscript s, including resistance in TiO2 film and electrolyte) The symbols R and CPE describe a resistance and a constant phase element, respectively;...
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Báo cáo hóa học: " Effects of Shape and Strain Distribution of Quantum Dots on Optical Transition in the Quantum Dot Infrared " doc
... 500 Energy (eV) Fig The intra-band photocurrent (PC) at 77 K and bias ˚ 74 ± 16 A, and the quantum dot density has a range from 613/um to 733/um2 The average quantum dot width with ˚ the range from ... the quantum dot ground state transitions is centered at 1.058 eV and a small broad shoulder due to smaller quantum dots or InAs wetting layer appears at 1.216 eV Figure shows the intra-band photocurrent ... InAs QD with the height and base ˚ being 80 and 168 A, respectively, and lense-shaped InAs ˚ QD with the height and diameter being 80 and 240 A, respectively The distribution and value of strain...
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Báo cáo hóa học: " Electronic States and Light Absorption in a Cylindrical Quantum Dot Having Thin Falciform Cross Section" pptx
... ‘‘Semiconductor Micro- and Nanoelectronics’’ (2005), p 189 10 D Leonard et al., Phys Rev B 50, 11687 (1994) doi:10.1103/ PhysRevB.50.11687 11 P Harrison, Quantum Wells, Wires and Dots: Theoretical and Computational ... : 2 ðchðx=cÞÞ2 c2 L c ð17Þ Here k and c are parameters describing the depth and width of corresponding quantum well, respectively Note that they depend on the quantum number n of the ‘‘fast’’ ... m;m0 where m and m0 are sets of quantum numbers corresponding to the electron and heavy hole, Eg is the forbidden gap width in the bulk semiconductor, X is the incident light frequency, and A is...
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Báo cáo hóa học: " Self-assembled GaInNAs/GaAsN quantum dot lasers: solid source molecular beam epitaxy growth and high-temperature operation" pptx
... the bandgap and lattice matching to GaAs [3–6] Figure shows the relationship between the lattice constant and bandgap energy in III–V alloy semiconductors, taking into account the significant bandgap ... average dot height in the range of 2–16 nm and dot lateral diameter in the range of 20–45 nm Thickness and material composition are basic parameters, which impact the QD structural Fig (a) Dot density, ... compared to the dot layer and barrier layer Its presence will modify the strain field or quantum confinement conditions of the dot layer A properly designed intermediate layer can improve the dot size...
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Báo cáo hóa học: " Properties and applications of quantum dot heterostructures grown by molecular beam epitaxy" pot
... density of states (DOS) in the conduction band (CB) and valence band (VB) for a (a) double heterostructure, (b) quantum well, (c) quantum wire, and (d) quantum box laser DOS functions However, ... it has been shown that the size fluctuation of dots is relatively small (£10%) and the small dots and surrounding host matrix are dislocation-free and strained coherently with GaAs It has been ... d and e), corresponding to L = 1.8 and 2.0 MLs, respectively, the typical dot diameter is d~50 nm and the typical height is h~7 nm For sample A3 (L = 2.3 MLs), the AFM image shows that the dot...
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Pin mặt trời sử dụng công nghệ giếng lượng tử ( quantum well solar cell pot
... 900 Reflectivity (%) Internal quantum efficiency (%) 100 100 0 1000 1000 Wavelength (nm) Wavelength (nm) [3] D.C Johnson et al Solar Energy Materials and Solar Cells, 2005 Giải thích MQW DBR ... T=300K 0.8 0.7 he so hap thu phi tuyen 0.6 0.5 0.4 0.3 0.2 0.1 rong ho luong tu L(m) 10 -8 x 10 dothi 0.45 Sự phụ thuộc của hệ số hấp thụ sóng điện từ vào nhiệt độ T E1 E2 0.4 he ... trường 0.3 he so hap thu phi tuyen 0.25 0.2 0.15 0.1 L1
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báo cáo khoa học: "Dynamics and mechanisms of quantum dot nanoparticle cellular uptake" pps
... followed Briefly, cells were seeded in a 96 -well plate at × 104 cells /well and allowed to adhere overnight at 37°C with 5% CO2 Then cells were treated with QDs as described above and incubated for ... SS, Weiss S: Quantum dots for live cells, in vivo imaging, and diagnostics Science 2005, 307:538-544 Medintz IL, Mattoussi H, Clapp AR: Potential clinical applications of quantum dots Int J Nanomedicine ... and imaging of multifunctional quantum dotconjugated immunoliposomes in vitro and in vivo Nano Lett 2008, 8:2851-2857 11 Derfus AM, Chen AA, Min DH, Ruoslahti E, Bhatia SN: Targeted quantum dot...
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