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High Efficiency Hybrid Solar Cells Using Nanocrystalline Si Quantum Dots and Si Nanowires.

High Efficiency Hybrid Solar Cells Using Nanocrystalline Si Quantum Dots and Si Nanowires.

ACS nano (2015-07-15)

Mrinal Dutta, Lavanya Thirugnanam, Pham Van Trinh, Naoki Fukata

ABSTRACT

We report on an efficient hybrid Si nanocrystal quantum dot modified radial p-n junction thinner Si solar cell that utilizes the advantages of effective exciton collection by energy transfer from nanocrystal-Si (nc-Si) quantum dots to underlying radial p-n junction Si nanowire arrays with excellent carrier separation and propagation via the built-in electric fields of radial p-n junctions. Minimization of recombination, optical, and spectrum losses in this hybrid structure led to a high cell efficiency of 12.9%.

MATERIALS

Product Number

Brand

Product Description

Sigma-Aldrich

Methanol, suitable for NMR (reference standard)

Sigma-Aldrich

Mesitylene, 98%

Sigma-Aldrich

Silver nitrate, 99.9999% trace metals basis

Sigma-Aldrich

Hydrogen peroxide solution, 34.5-36.5%

Sigma-Aldrich

Methanol, anhydrous, 99.8%

Sigma-Aldrich

Ethanol Fixative 80% v/v, suitable for fixing solution (blood films)

Sigma-Aldrich

Silver nitrate, BioXtra, >99% (titration)

Sigma-Aldrich

Silver nitrate, BioReagent, suitable for plant cell culture, >99% (titration)

Sigma-Aldrich

Methanol, purification grade, 99.8%

Sigma-Aldrich

Sulfuric acid, 99.999%

Sigma-Aldrich

Mesitylene, reagent grade, 97%

Supelco

Ethanol standards 10% (v/v), 10 % (v/v) in H₂O, analytical standard

Sigma-Aldrich

Silver nitrate, ≥99.999% trace metals basis

Sigma-Aldrich

Toluene, JIS special grade, ≥99.5%

Sigma-Aldrich

Ethyl alcohol, Pure, 200 proof, anhydrous, ≥99.5%

Sigma-Aldrich

Methanol solution, contains 0.50 % (v/v) triethylamine

Sigma-Aldrich

Toluene, anhydrous, 99.8%

Sigma-Aldrich

Ethyl alcohol, Pure, 190 proof, meets USP testing specifications

Sigma-Aldrich

1-Octadecene, technical grade, 90%

Sigma-Aldrich

Silver nitrate on silica gel, extent of labeling: ~10 wt. % loading, +230 mesh

Sigma-Aldrich

Ethyl alcohol, Pure, 190 proof, ACS spectrophotometric grade, 95.0%

Sigma-Aldrich

Silver nitrate solution, 2.5 % (w/v) AgNO₃ in H₂O

Sigma-Aldrich

1-Octadecene, ≥95.0% (GC)

Sigma-Aldrich

Ethyl alcohol, Pure, 200 proof, ACS reagent, meets USP testing specifications, Excise Tax-free, Permit for use required

Sigma-Aldrich

Ethyl alcohol, Pure, 160 proof, Excise Tax-free, Permit for use required

Sigma-Aldrich

Ethyl alcohol, Pure, 190 proof, ACS reagent, meets USP testing specifications, Excise Tax-free, Permit for use required