Concept

Efficacité quantique

Publications associées (364)

A quasi core-shell nitrogen-doped graphene/cobalt sulfide conductive catalyst for highly efficient dye-sensitized solar cells

A novel conductive catalyst was designed based on a quasi core shell structure of N-doped graphene/cobalt sulfide. This platinum-free catalyst shows high catalytic activity and conductivity owing to close interactions between the core (cobalt sulphide) and ...

Royal Society of Chemistry2014

Hole-Transporting Small Molecules Based on Thiophene Cores for High Efficiency Perovskite Solar Cells

Michael Graetzel, Ulf Anders Hagfeldt, Kunwu Fu

Two new electron-rich molecules, 2,3,4,5-tetra[4,4'-bis(methoxyphenyl)aminophen-4 ''-yl]-thiophene (H111) and 4,4',5,5'-tetra[4,4'-bis(methoxyphenyl) aminophen-4 ''-yl]-2,2'-bithiophene (H112), which contain thiophene cores with arylamine side groups, are ...

Wiley-V C H Verlag Gmbh2014

High efficiency electrospun TiO2 nanofiber based hybrid organic-inorganic perovskite solar cell

Michael Graetzel, Nripan Mathews, Thi Thu Trang Pham

The good electrical and morphological characteristics of TiO2 nanofibers and the high extinction coefficient of CH3NH3PbI3 perovskite are combined to obtain a solar cell with a power conversion efficiency of 9.8%. The increase of the film thickness dramati ...

Royal Society of Chemistry2014

Thin-Film Silicon Triple-Junction Solar Cells on Highly Transparent Front Electrodes With Stabilized Efficiencies up to 12.8%

Christophe Ballif, Franz-Josef Haug, Matthieu Despeisse, Mathieu Gérard Boccard, Grégory Bugnon, Michael Elias Stückelberger

High-efficiency thin-film silicon triple-junction solar cells in p-i-n configuration have been fabricated using amorphous silicon top cell absorber layers, as well as microcrystalline silicon middle and bottom cell absorbers. The triple-junction cells were ...

Ieee-Inst Electrical Electronics Engineers Inc2014

Triphenylamine groups improve blocking behavior of phenoxazine dyes in cobalt-electrolyte-based dye-sensitized solar cells

Ulf Anders Hagfeldt, Liang Sun, Yan Hao

Novel phenoxazine dyes are successfully introduced as sensitizers into dye-sensitized solar cells (DSCs) with cobalt-based electrolyte. In sensitizers with triphenylamine (TPA) groups recombination from electrons in the TiO2 conduction band to the cobalt(I ...

2014

Thin Film Metal Nanocluster Light-Emitting Devices

Björn Niesen

Light-emitting devices that utilize thin films of metal nanoclusters as quantum emitters are presented. Implementing Ag as well as Au nanoclusters, the versatility of the approach is demonstrated, and it is shown that the electroluminescence measured from ...

Wiley-V C H Verlag Gmbh2014

Decoupling light absorption and charge transport properties in near IR-sensitized Fe2O3 regenerative cells

Michael Graetzel, Nripan Mathews, Kazuteru Nonomura, Satvasheel Powar

We report a regenerative iron oxide nanorod solar cell sensitized with squarine (SQ02) dye, which improves the overall light harvesting due to the dye's complementary absorption. The use of illumination sources which enabled selective excitation of Fe2O3 a ...

Royal Society of Chemistry2013

Nanofibrous TiO2 improving performance of mesoporous TiO2 electrode in dye-sensitized solar cell

Michael Graetzel, Jun Ho Yum, Ladislav Kavan

A method of direct coating of conducting glass by electrospinning was developed. Electrospun fibrous TiO2 consisting of closely packed anatase nanocrystals of 40-50 nm in size was incorporated into mesoporous TiO2 thin film stabilized by phosphorus. The me ...

Springer Verlag2013

Temperature-Dependence of Exciton Radiative Recombination in (Al,Ga)N/GaN Quantum Wells Grown on a-Plane GaN Substrates

Nicolas Grandjean, Benoît Marie Joseph Deveaud, Etienne François Olivier Giraud, Jean-Daniel Ganière, Pierre Michel Corfdir, Mehran Shahmohammadi

This article presents the dynamics of excitons in a-plane (Al,Ga)N/GaN single quantum wells of various thicknesses grown on bulk GaN substrates. For all quantum well samples, recombination is observed to be predominantly radiative in the low-temperature ra ...

Japan Society of Applied Physics2013

Quantum efficiency of technical metal photocathodes under laser irradiation of various wavelengths

Christoph Peter Hauri, Fernando Ardana Lamas

Quantum efficiency studies for various laser wavelengths and various technical metal surfaces were carried out in a dedicated unbaked vacuum chamber in the absence of a significant electrical field. Copper, magnesium, aluminum, and aluminum-lithium photoca ...

Springer Verlag2013

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