Systematic stacking of PbS/CdS/CdSe multi-layered quantum dots for the enhancement of solar cell efficiency by harvesting wide solar spectrum

Core-shell nanocrystals are utilized to improve vitality conversion efficiency of Si based solar cells. In the present work, a study of synthesis and characterization of photo luminescent, down-shifting, core-shell CdSe/CdS quantum dots is introduced. The QD,s absorb in the UV range (350nm) of the solar spectrum and emit photons with wavelengths centered at (574 nm). Calculated energy gap is (2.16 eV), which is well suited for Silicon absorption and electron-hole pair generation. The grain size is ranged between (1.814 and 3.456 nm). Results show that the cell efficiency is improved from (8.81%) (For a reference silicon solar cell) to (10.07%) (For a CdSe/CdS QD deposited directly on the surface of the solar cell). This improvement is referred to the spreading of the absorbed solar radiation over the spectral response of the Si solar cell.

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Silicon solar cell efficiency improvement employing the photoluminescent, down-shifting effects of carbon and CdTe quantum dots

Materials for Renewable and Sustainable Energy ◽

10.1007/s40243-016-0070-4 ◽

2016 ◽

Vol 5 (2) ◽

Cited By ~ 11

Author(s):

Elias Pelayo ◽

Aldo Zazueta ◽

Rosendo Lopez ◽

Emmanuel Saucedo ◽

Ruben Ruelas ◽

...

Keyword(s):

Quantum Dots ◽

Solar Cell ◽

Silicon Solar Cell ◽

Cdte Quantum Dots ◽

Efficiency Improvement ◽

Solar Cell Efficiency ◽

Cell Efficiency

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Modifying the solar spectrum to enhance silicon solar cell efficiency—An overview of available materials

Solar Energy Materials and Solar Cells ◽

10.1016/j.solmat.2006.09.003 ◽

2007 ◽

Vol 91 (4) ◽

pp. 238-249 ◽

Cited By ~ 448

Author(s):

C. Strümpel ◽

M. McCann ◽

G. Beaucarne ◽

V. Arkhipov ◽

A. Slaoui ◽

...

Keyword(s):

Solar Cell ◽

Silicon Solar Cell ◽

Solar Spectrum ◽

Solar Cell Efficiency ◽

Cell Efficiency

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Strong Enhancement of Solar Cell Efficiency Due to Quantum Dots with Built-In Charge

Nano Letters ◽

10.1021/nl200543v ◽

2011 ◽

Vol 11 (6) ◽

pp. 2311-2317 ◽

Cited By ~ 172

Author(s):

Kimberly A. Sablon ◽

John W. Little ◽

Vladimir Mitin ◽

Andrei Sergeev ◽

Nizami Vagidov ◽

...

Keyword(s):

Quantum Dots ◽

Solar Cell ◽

Solar Cell Efficiency ◽

Cell Efficiency ◽

Strong Enhancement

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A feasibility study of unconventional planar ligand spacers in chalcogenide nanocrystals

Physical Chemistry Chemical Physics ◽

10.1039/c5cp07521a ◽

2016 ◽

Vol 18 (20) ◽

pp. 13781-13793 ◽

Cited By ~ 1

Author(s):

Binit Lukose ◽

Paulette Clancy

Keyword(s):

Quantum Dots ◽

Solar Cell ◽

Feasibility Study ◽

Solar Cell Efficiency ◽

Cell Efficiency ◽

The Past ◽

Long Chain

The solar cell efficiency of chalcogenide nanocrystals (quantum dots) has been limited in the past by the insulation between neighboring quantum dots caused by intervening, often long-chain, aliphatic ligands.

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Silicon solar cell efficiency improvement employing the photoluminescent, downshifting effects of carbon quantum dots

2016 Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS (DTIP) ◽

10.1109/dtip.2016.7514887 ◽

2016 ◽

Author(s):

J. E. Pelayo ◽

A. Zazueta ◽

R. Lopez-Delgado ◽

E. Saucedo ◽

R. Ruelas ◽

...

Keyword(s):

Quantum Dots ◽

Solar Cell ◽

Silicon Solar Cell ◽

Carbon Quantum Dots ◽

Efficiency Improvement ◽

Solar Cell Efficiency ◽

Cell Efficiency

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Wide Spectrum Absorption of CuGaS2 with Intermediate Bands

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.148-149.1558 ◽

2011 ◽

Vol 148-149 ◽

pp. 1558-1561 ◽

Cited By ~ 4

Author(s):

Ming Sheng Qin ◽

Fu Qiang Huang ◽

Ping Chen

Keyword(s):

Solar Cell ◽

Absorption Edge ◽

Wide Spectrum ◽

Solar Spectrum ◽

Doping Content ◽

Intermediate Band ◽

Solar Cell Efficiency ◽

Cell Efficiency ◽

Theoretical Predictions

The intermediate bands materials CuGa1-xQxS2 (Q = Ge, Sn) were investigated, and the narrow half-ﬁlled intermediate bands were successfully introduced into the chalcopyrite CuGaS2 when Ga3+ ion were partially replaced by Ge4+(Sn4+) impurities. The absorption edge of CuGa1-xQxS2 red shifts greatly with the increasing in the doping content due to the form of Ge-4s (Sn-5s) and S-3p hybridization orbits intermediate band, even small Q-doping content(2mol %), considerable red shifts are still achieved. CuGa1-xQxS2 (Q = Ge, Sn) with IBs extend the range of solar spectrum and could be the excellent candidates for the theoretical predictions of enhanced solar cell efficiency.

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