Search

Your search keyword '"Pierre, M"' showing total 24 results
Start Over Author "Pierre, M" Journal applied physics letters
24 results on '"Pierre, M"'

1. Hybrid tandem quantum dot/organic photovoltaic cells with complementary near infrared absorption

Author

Omar F. Mohammed, Yuliar Firdaus, Ahmad R. Kirmani, Elenita Palmiano, Hanlin Hu, Ru-Ze Liang, Sjoerd Hoogland, Taesoo Kim, Banavoth Murali, Edward H. Sargent, Arif D. Sheikh, Aram Amassian, Pierre M. Beaujuge, Mingjian Yuan, and Yangqin Gao

Subjects
Engineering, Physics and Astronomy (miscellaneous), Tandem, business.industry, Photovoltaic system, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Quantum dot, Optoelectronics, Center (algebra and category theory), 0210 nano-technology, business, Energy Conversion and Storage, Near infrared absorption
Abstract

Monolithically integrated hybrid tandem solar cells that effectively combine solution-processed colloidal quantum dot (CQD) and organic bulk heterojunction subcells to achieve tandem performance that surpasses the individual subcell efficiencies have not been demonstrated to date. In this work, we demonstrate hybrid tandem cells with a low bandgap PbS CQD subcell harvesting the visible and near-infrared photons and a polymer:fullerene—poly (diketopyrrolopyrrole-terthiophene) (PDPP3T):[6,6]-phenyl-C60-butyric acid methyl ester (PC61BM)—top cell absorbing effectively the red and near-infrared photons of the solar spectrum in a complementary fashion. The two subcells are connected in series via an interconnecting layer (ICL) composed of a metal oxide layer, a conjugated polyelectrolyte, and an ultrathin layer of Au. The ultrathin layer of Au forms nano-islands in the ICL, reducing the series resistance, increasing the shunt resistance, and enhancing the device fill-factor. The hybrid tandems reach a power conversion efficiency (PCE) of 7.9%, significantly higher than the PCE of the corresponding individual single cells, representing one of the highest efficiencies reported to date for hybrid tandem solar cells based on CQD and polymer subcells.

Published
2017

2. Hybrid tandem quantum dot/organic photovoltaic cells with complementary near infrared absorption

Author

Kim, Taesoo, primary, Palmiano, Elenita, additional, Liang, Ru-Ze, additional, Hu, Hanlin, additional, Murali, Banavoth, additional, Kirmani, Ahmad R., additional, Firdaus, Yuliar, additional, Gao, Yangqin, additional, Sheikh, Arif, additional, Yuan, Mingjian, additional, Mohammed, Omar F., additional, Hoogland, Sjoerd, additional, Beaujuge, Pierre M., additional, Sargent, Edward H., additional, and Amassian, Aram, additional

Published
2017
Full Text
View/download PDF

3. Hybrid tandem quantum dot/organic photovoltaic cells with complementary near infrared absorption.

Author

Taesoo Kim, Palmiano, Elenita, Ru-Ze Liang, Hanlin Hu, Murali, Banavoth, Kirmani, Ahmad R., Firdaus, Yuliar, Gao, Yangqin, Sheikh, Arif, Yuan, Mingjian, Mohammed, Omar F., Hoogland, Sjoerd, Beaujuge, Pierre M., Sargent, Edward H., and Amassian, Aram

Subjects
SOLAR cells, QUANTUM dots, PHOTONS, METHYL formate, PHOTOVOLTAIC cells, FULLERENE polymers
Abstract

Monolithically integrated hybrid tandem solar cells that effectively combine solution-processed colloidal quantum dot (CQD) and organic bulk heterojunction subcells to achieve tandem performance that surpasses the individual subcell efficiencies have not been demonstrated to date. In this work, we demonstrate hybrid tandem cells with a low bandgap PbS CQD subcell harvesting the visible and near-infrared photons and a polymer:fullerene—poly (diketopyrrolopyrrole-terthiophene) (PDPP3T):[6,6]-phenyl-C60-butyric acid methyl ester (PC61BM)—top cell absorbing effectively the red and near-infrared photons of the solar spectrum in a complementary fashion. The two subcells are connected in series via an interconnecting layer (ICL) composed of a metal oxide layer, a conjugated polyelectrolyte, and an ultrathin layer of Au. The ultrathin layer of Au forms nano-islands in the ICL, reducing the series resistance, increasing the shunt resistance, and enhancing the device fill-factor. The hybrid tandems reach a power conversion efficiency (PCE) of 7.9%, significantly higher than the PCE of the corresponding individual single cells, representing one of the highest efficiencies reported to date for hybrid tandem solar cells based on CQD and polymer subcells. [ABSTRACT FROM AUTHOR]

Published
2017
Full Text
View/download PDF

6. Suppression of pointing instability in quantum cascade lasers by transverse mode control

Author

Claire F. Gmachl, Xiaojun Wang, Mariano Troccoli, Nyan Aung, Jen-Yu Fan, Peter Q. Liu, and Pierre M. Bouzi

Subjects
Physics, Physics and Astronomy (miscellaneous), business.industry, Slope efficiency, Injection seeder, Laser, Transverse mode, law.invention, Optics, law, Quantum dot laser, Optical cavity, business, Quantum well, Tunable laser
Abstract

We report on a technique that serves to eliminate pointing instability in Quantum Cascade lasers by suppressing the propagation of higher order transverse modes within the laser cavity. This process, achieved via a short and lossy lateral constriction in the waveguide, only allows the fundamental mode to propagate. The beam pointing fluctuations of the modified devices are greatly reduced, with a 10-fold improvement in standard deviation, indicating a stable emitted beam. The far-field pattern has a Gaussian shape, and the slope efficiency of the received power on a 0.87 numerical aperture detector increases by ∼65%, without significant increase in threshold.

Published
2013

8. Fiber-connectorized micropillar cavities

Author

Haupt, Florian, primary, Oemrawsingh, Sumant S. R., additional, Thon, Susanna M., additional, Kim, Hyochul, additional, Kleckner, Dustin, additional, Ding, Dapeng, additional, Suntrup, Donald J., additional, Petroff, Pierre M., additional, and Bouwmeester, Dirk, additional

Published
2010
Full Text
View/download PDF

9. Independent electrical tuning of separated quantum dots in coupled photonic crystal cavities

Author

Jenna Hagemeier, Pierre M. Petroff, Dirk Bouwmeester, Jan Gudat, Hyun Tae Kim, Cristian Bonato, and Susanna M. Thon

Subjects
Materials science, Physics and Astronomy (miscellaneous), Superlattice, FOS: Physical sciences, Physics::Optics, Quantum simulator, 02 engineering and technology, 01 natural sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, 010306 general physics, Electrical tuning, Diode, Photonic crystal, Quantum optics, Quantum Physics, Quantum network, Condensed Matter - Mesoscale and Nanoscale Physics, business.industry, 021001 nanoscience & nanotechnology, 3. Good health, Quantum dot, Optoelectronics, Quantum Physics (quant-ph), 0210 nano-technology, business, Physics - Optics, Optics (physics.optics)
Abstract

Systems of photonic crystal cavities coupled to quantum dots are a promising architecture for quantum networking and quantum simulators. The ability to independently tune the frequencies of laterally separated quantum dots is a crucial component of such a scheme. Here, we demonstrate independent tuning of laterally separated quantum dots in photonic crystal cavities coupled by in-plane waveguides by implanting lines of protons which serve to electrically isolate different sections of a diode structure., Comment: 3 pages, 3 figures

Published
2011

10. Fast quantum dot single photon source triggered at telecommunications wavelength

Author

Sonia Buckley, Jelena Vuckovic, Arka Majumdar, Hyochul Kim, Pierre M. Petroff, and Kelley Rivoire

Subjects
Photon, Physics and Astronomy (miscellaneous), FOS: Physical sciences, Physics::Optics, 02 engineering and technology, Purcell effect, 7. Clean energy, 01 natural sciences, law.invention, 010309 optics, Optics, law, 0103 physical sciences, Spontaneous emission, 010306 general physics, Photonic crystal, Quantum optics, Physics, Quantum Physics, business.industry, Second-harmonic generation, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, Laser, Wavelength, Quantum dot laser, Quantum dot, Single-photon source, Excited state, Optoelectronics, Continuous wave, Photonics, Quantum Physics (quant-ph), 0210 nano-technology, Telecommunications, business, Physics - Optics, Optics (physics.optics)
Abstract

We demonstrate a quantum dot single photon source at 900 nm triggered at 300 MHz by a continuous wave telecommunications wavelength laser followed by an electro-optic modulator. The quantum dot is excited by on-chip-generated second harmonic radiation, resonantly enhanced by a GaAs photonic crystal cavity surrounding the InAs quantum dot. Our result suggests a path toward the realization of telecommunications-wavelength-compatible quantum dot single photon sources with speeds exceeding 1 GHz., Comment: corrected typos

Published
2011

11. Direct observation of dynamic surface acoustic wave controlled carrier injection into single quantum posts using phase-resolved optical spectroscopy

Author

Hyochul Kim, Florian J. R. Schülein, Pierre M. Petroff, Tuan A. Truong, Stefan Völk, Florian Knall, Hubert J. Krenner, and Achim Wixforth

Subjects
Photoluminescence, Materials science, Physics and Astronomy (miscellaneous), Exciton, Phase (waves), FOS: Physical sciences, 02 engineering and technology, 01 natural sciences, Gallium arsenide, chemistry.chemical_compound, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, ddc:530, 010306 general physics, Spectroscopy, Quantum well, Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics, business.industry, Surface acoustic wave, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, 3. Good health, chemistry, Modulation, Optoelectronics, Quantum Physics (quant-ph), 0210 nano-technology, business
Abstract

A versatile stroboscopic technique based on active phase-locking of a surface acoustic wave to picosecond laser pulses is used to monitor dynamic acoustoelectric effects. Time-integrated multi-channel detection is applied to probe the modulation of the emission of a quantum well for different frequencies of the surface acoustic wave. For quantum posts we resolve dynamically controlled generation of neutral and charged excitons and preferential injection of holes into localized states within the nanostructure., Comment: 10 pages, 4 figures

Published
2011

21. Luminescence quenching in InAs quantum dots

Author

Haft, Dirk, primary, Warburton, Richard J., additional, Karrai, Khaled, additional, Huant, Serge, additional, Medeiros-Ribeiro, Gilberto, additional, Garcia, Jorge M., additional, Schoenfeld, Winston, additional, and Petroff, Pierre M., additional

Published
2001
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results