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10 Mar 12:21

Exfoliated and Partially Oxidized MoS2 Nanosheets by One-Pot Reaction for Efficient and Stable Organic Solar Cells

by Jin-Mun Yun, Yong-Jin Noh, Cheol-Ho Lee, Seok-In Na, Sungho Lee, Seung Mu Jo, Han-Ik Joh, Dong-Yu Kim
Thumbnail image of graphical abstract

A facile and efficient synthesis of a solution-processable MoO3/MoS2 featuring uniformly decorated MoO3 nanoparticles onto exfoliated MoS2 nanosheets is realized via a one-step oxidation and spontaneous exfoliation method using hydrogen peroxide. By using MoO3/MoS2 as a hole extraction layer in organic solar cells, high efficiencies, regardless of annealing conditions of the interfacial layer, and excellent long-term stability are demonstrated.

10 Mar 12:10

Tunable Band Structures of Heterostructured Bilayers with Transition-Metal Dichalcogenide and MXene Monolayer

by Zhinan Ma, Zhenpeng Hu, Xudong Zhao, Qing Tang, Dihua Wu, Zhen Zhou and Lixin Zhang

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The Journal of Physical Chemistry C
DOI: 10.1021/jp500861n
10 Mar 12:08

Observation of Photoinduced Charge Transfer in Novel Luminescent CdSe Quantum Dot–CePO4:Tb Metal Oxide Nanowire Composite Heterostructures

by Jinkyu Han, Lei Wang and Stanislaus S. Wong

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The Journal of Physical Chemistry C
DOI: 10.1021/jp4113816
10 Mar 11:24

Photoluminescence of freestanding single- and few-layer MoS2

by Nils Scheuschner, Oliver Ochedowski, Anne-Marie Kaulitz, Roland Gillen, Marika Schleberger, and Janina Maultzsch

Author(s): Nils Scheuschner, Oliver Ochedowski, Anne-Marie Kaulitz, Roland Gillen, Marika Schleberger, and Janina Maultzsch

We present a photoluminescence study of freestanding and Si/SiO2 supported single- and few-layer MoS2. The single-layer exciton peak (A) is only observed in freestanding MoS2. The photoluminescence of supported single-layer MoS2 instead originates from the A− (trion) peak as the MoS2 is n-type doped...

[Phys. Rev. B 89, 125406] Published Wed Mar 05, 2014

05 Mar 14:36

Quantum dots: Electrifying cavities

by Ruth Oulton

Nature Nanotechnology 9, 169 (2014). doi:10.1038/nnano.2014.41

Author: Ruth Oulton

A design that allows electrical contacts to be created on semiconductor microphotonic structures brings quantum networks based on semiconductor single photon sources one step closer.

04 Mar 16:47

van der Waals trilayers and superlattices: modification of electronic structures of MoS2 by intercalation

Nanoscale, 2014, 6,4566-4571
DOI: 10.1039/C4NR00783B, Communication
Open Access Open Access
Ning Lu, Hongyan Guo, Lu Wang, Xiaojun Wu, Xiao Cheng Zeng
We perform a comprehensive first-principles study of the electronic properties of van der Waals (vdW) trilayers via intercalating a two-dimensional (2D) monolayer (ML = BN, MoSe2, WS2, or WSe2) between a MoS2 bilayer to form various MoS2/ML/MoS2 sandwich trilayers.
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04 Mar 14:55

Synthesis of highly luminescent wurtzite CdSe/CdS giant-shell nanocrystals using a fast continuous injection route

J. Mater. Chem. C, 2014, 2,3439-3447
DOI: 10.1039/C4TC00280F, Paper
Open Access Open Access
Creative Commons Licence&nbsp This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
S. Christodoulou, G. Vaccaro, V. Pinchetti, F. De Donato, J. Q. Grim, A. Casu, A. Genovese, G. Vicidomini, A. Diaspro, S. Brovelli, L. Manna, I. Moreels
Non-blinking wurtzite giant-shell CdSe/CdS nanocrystals are produced in 4 hours or less, with fluorescence quantum efficiencies up to 90%.
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04 Mar 12:27

Single-Layer MoS2 with Sulfur Vacancies: Structure and Catalytic Application

by Duy Le, Takat B. Rawal and Talat S. Rahman

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The Journal of Physical Chemistry C
DOI: 10.1021/jp411256g
04 Mar 12:27

Quantum-Dot-Sensitized Solar Cells with Water-Soluble and Air-Stable PbS Quantum Dots

by Askhat N. Jumabekov, Felix Deschler, Daniel Böhm, Laurence M. Peter, Jochen Feldmann and Thomas Bein

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The Journal of Physical Chemistry C
DOI: 10.1021/jp4110773
04 Mar 10:32

Coherent Coupling of Excitons and Trions in a Photoexcited CdTe/CdMgTe Quantum Well

by G. Moody, I. A. Akimov, H. Li, R. Singh, D. R. Yakovlev, G. Karczewski, M. Wiater, T. Wojtowicz, M. Bayer, and S. T. Cundiff

Author(s): G. Moody, I. A. Akimov, H. Li, R. Singh, D. R. Yakovlev, G. Karczewski, M. Wiater, T. Wojtowicz, M. Bayer, and S. T. Cundiff

We present zero-, one-, and two-quantum two-dimensional coherent spectra of excitons and trions in a CdTe/(Cd,Mg)Te quantum well. The set of spectra provides a unique and comprehensive picture of the coherent nonlinear optical response. Distinct peaks in the spectra are manifestations of exciton-exc...

[Phys. Rev. Lett. 112, 097401] Published Mon Mar 03, 2014

04 Mar 10:27

Multiple satellites in materials with complex plasmon spectra: From graphite to graphene

by Matteo Guzzo, Joshua J. Kas, Lorenzo Sponza, Christine Giorgetti, Francesco Sottile, Debora Pierucci, Mathieu G. Silly, Fausto Sirotti, John J. Rehr, and Lucia Reining

Author(s): Matteo Guzzo, Joshua J. Kas, Lorenzo Sponza, Christine Giorgetti, Francesco Sottile, Debora Pierucci, Mathieu G. Silly, Fausto Sirotti, John J. Rehr, and Lucia Reining

The photoemission spectrum of graphite is still debated. To help resolve this issue, we present photoemission measurements at high photon energy and analyze the results using a Green's function approach that takes into account the full complexity of the loss spectrum. Our measured data show multiple...

[Phys. Rev. B 89, 085425] Published Thu Feb 27, 2014

04 Mar 10:27

All-optical tomography of electron spins in (In,Ga)As quantum dots

by S. Varwig, A. René, Sophia E. Economou, A. Greilich, D. R. Yakovlev, D. Reuter, A. D. Wieck, T. L. Reinecke, and M. Bayer

Author(s): S. Varwig, A. René, Sophia E. Economou, A. Greilich, D. R. Yakovlev, D. Reuter, A. D. Wieck, T. L. Reinecke, and M. Bayer

We demonstrate the basic features of an all-optical spin tomography on picosecond time scale. The magnetization vector associated with a mode-locked electron spin ensemble in singly charged quantum dots is traced by ellipticity measurements using picosecond laser pulses. After optical orientation th...

[Phys. Rev. B 89, 081310] Published Fri Feb 28, 2014

04 Mar 10:26

Strong hyperfine-induced modulation of an optically driven hole spin in an InAs quantum dot

by S. G. Carter, Sophia E. Economou, A. Greilich, Edwin Barnes, T. Sweeney, A. S. Bracker, and D. Gammon

Author(s): S. G. Carter, Sophia E. Economou, A. Greilich, Edwin Barnes, T. Sweeney, A. S. Bracker, and D. Gammon

Compared to electrons, holes in InAs quantum dots have a significantly weaker hyperfine interaction that leads to less dephasing from nuclear spins. Thus many recent studies have suggested that nuclear spins are unimportant for hole-spin dynamics compared to electric-field fluctuations. We show that...

[Phys. Rev. B 89, 075316] Published Fri Feb 28, 2014

03 Mar 17:06

Enhanced photovoltaic performance utilizing effective charge transfers and light scattering effects by the combination of mesoporous, hollow 3D-ZnO along with 1D-ZnO in CdS quantum dot sensitized solar cells

Phys. Chem. Chem. Phys., 2014, 16,9625-9633
DOI: 10.1039/C3CP55276D, Paper
Tridip Ranjan Chetia, Dipankar Barpuzary, Mohammad Qureshi
Hybrid photoanode based on 3D ZnO HMSP and 1D ZnO NWs on an FTO coated glass substrate for solar harvesting.
The content of this RSS Feed (c) The Royal Society of Chemistry
03 Mar 17:06

A size dependent discontinuous decay rate for the exciton emission in ZnO quantum dots

Phys. Chem. Chem. Phys., 2014, 16,13849-13857
DOI: 10.1039/C4CP00254G, Paper
T. Jesper Jacobsson, Sviatlana Viarbitskaya, Emad Mukhtar, Tomas Edvinsson
Possible transitions related to the UV-fluorescence in ZnO quantum dots, here investigated by time resolved laser spectroscopy.
The content of this RSS Feed (c) The Royal Society of Chemistry
28 Feb 11:49

Tunable electroluminescence properties in CdSe/PVK guest-host based light-emitting devices

Phys. Chem. Chem. Phys., 2014, 16,8589-8593
DOI: 10.1039/C4CP00066H, Paper
Jin Young Park, Rigoberto C. Advincula
The photo- and electroluminescence properties of CdSe-TOPO quantum dots (QDs) doped into a PVK:PBD host matrix with a double-layer device configuration [PEDOT:PSS/PVK:PBD/QDs/LiF/Al] are investigated. Both the concentration and applied bias voltage are found to be important tuneable factors in the emitted colors.
The content of this RSS Feed (c) The Royal Society of Chemistry
28 Feb 11:48

Significant enhancement of photocatalytic activity of rutile TiO2 compared with anatase TiO2 upon Pt nanoparticle deposition studied by far-ultraviolet spectroscopy

Phys. Chem. Chem. Phys., 2014, 16,7749-7753
DOI: 10.1039/C4CP00329B, Paper
Ichiro Tanabe, Takayuki Ryoki, Yukihiro Ozaki
The charge-separation efficiency of rutile TiO2 is considerably enhanced compared to that of anatase TiO2 upon the Pt nanoparticle deposition.
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27 Feb 17:32

Strain engineering of selective chemical adsorption on monolayer MoS2

Nanoscale, 2014, 6,5156-5161
DOI: 10.1039/C3NR06670C, Paper
Liangzhi Kou, Aijun Du, Changfeng Chen, Thomas Frauenheim
Nanomaterials are prone to influence by chemical adsorption because of their large surface to volume ratios.
The content of this RSS Feed (c) The Royal Society of Chemistry
27 Feb 12:56

Synergistic recombination suppression by an inorganic layer and organic dye molecules in highly photostable quantum dot sensitized solar cells

Phys. Chem. Chem. Phys., 2014, 16,6250-6256
DOI: 10.1039/C3CP54954B, Paper
Heping Shen, Jianbao Li, Lin Zhao, Shanshan Zhang, Wenli Wang, Dan Oron, Hong Lin
An inorganic layer and dye molecules have synergistically suppressed the recombination in a quantum dot sensitized solar cell (QDSSC), by designing a TiO2-CdS-ZnS-N3 hybrid photoanode.
The content of this RSS Feed (c) The Royal Society of Chemistry
27 Feb 12:49

Evidence for the Rapid Conversion of Primary Photoexcitations to Triplet States in Seleno- and Telluro- Analogues of Poly(3-hexylthiophene)

by Ryan D. Pensack, Yin Song, Theresa M. McCormick, Ashlee A. Jahnke, Jon Hollinger, Dwight S. Seferos and Gregory D. Scholes

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The Journal of Physical Chemistry B
DOI: 10.1021/jp5013347
27 Feb 12:42

Growth of Alloy MoS2xSe2(1–x) Nanosheets with Fully Tunable Chemical Compositions and Optical Properties

by Honglai Li, Xidong Duan, Xueping Wu, Xiujuan Zhuang, Hong Zhou, Qinglin Zhang, Xiaoli Zhu, Wei Hu, Pinyun Ren, Pengfei Guo, Liang Ma, Xiaopeng Fan, Xiaoxia Wang, Jinyou Xu, Anlian Pan and Xiangfeng Duan

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Journal of the American Chemical Society
DOI: 10.1021/ja500069b
26 Feb 16:58

Comparison of TiO2 and ZnO Solar Cells Sensitized with an Indoline Dye: Time-Resolved Laser Spectroscopy Studies of Partial Charge Separation Processes

by Jan Sobuś, Gotard Burdziński, Jerzy Karolczak, Jesús Idígoras, Juan A. Anta and Marcin Ziółek

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Langmuir
DOI: 10.1021/la404782s
26 Feb 16:41

Ultrafast Dynamics within the 1S Exciton Band of Colloidal PbSe Quantum Dots Using Multiresonant Coherent Multidimensional Spectroscopy

by Daniel D. Kohler, Stephen B. Block, Schuyler Kain, Andrei V. Pakoulev and John C. Wright

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The Journal of Physical Chemistry C
DOI: 10.1021/jp412058u
26 Feb 13:41

Exciton diffusion in monolayer and bulk MoSe2

Nanoscale, 2014, 6,4915-4919
DOI: 10.1039/C3NR06863C, Paper
Nardeep Kumar, Qiannan Cui, Frank Ceballos, Dawei He, Yongsheng Wang, Hui Zhao
High resolution transient absorption measurements reveal exciton dynamics in molybdenum diselenide monolayer and bulk crystals.
The content of this RSS Feed (c) The Royal Society of Chemistry
26 Feb 13:39

Recombination Dynamics of Band Edge Excitons in Quasi-Two-Dimensional CdSe Nanoplatelets

by Louis Biadala, Feng Liu, Mickael D. Tessier, Dmitri R. Yakovlev, Benoit Dubertret and Manfred Bayer

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Nano Letters
DOI: 10.1021/nl403311n
25 Feb 11:18

Electronic Structure of a Quasi-Freestanding MoS2 Monolayer

by T. Eknapakul, P. D. C. King, M. Asakawa, P. Buaphet, R.-H. He, S.-K. Mo, H. Takagi, K. M. Shen, F. Baumberger, T. Sasagawa, S. Jungthawan and W. Meevasana

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Nano Letters
DOI: 10.1021/nl4042824
24 Feb 16:24

Erratum: Robust optical emission polarization in MoS2 monolayers through selective valley excitation [Phys. Rev. B 86, 081301(R) (2012)]

by G. Sallen, L. Bouet, X. Marie, G. Wang, C. R. Zhu, W. P. Han, Y. Lu, P. H. Tan, T. Amand, B. L. Liu, and B. Urbaszek

Author(s): G. Sallen, L. Bouet, X. Marie, G. Wang, C. R. Zhu, W. P. Han, Y. Lu, P. H. Tan, T. Amand, B. L. Liu, and B. Urbaszek

[Phys. Rev. B 89, 079903] Published Mon Feb 24, 2014

24 Feb 10:48

An in situ self-assembled core-shell precursor route to prepare ultrasmall copper nanoparticles on silica catalysts

J. Mater. Chem. A, 2014, 2,7837-7844
DOI: 10.1039/C3TA14592A, Paper
Liuye Mo, Sibudjing Kawi
Ultra-small copper nanoparticles (1.6 nm) on silica catalysts were successfully prepared via an in situ self-assembled core-shell precursor route and exhibited good activity for water-gas shift reaction.
The content of this RSS Feed (c) The Royal Society of Chemistry
24 Feb 10:44

Charge Transfer Mediation Through CuxS. The Hole Story of CdSe in Polysulfide

by James G. Radich, Nevin R. Peeples, Pralay K. Santra and Prashant V. Kamat

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The Journal of Physical Chemistry C
DOI: 10.1021/jp4113365
24 Feb 10:43

Effect of Chloride Ligands on CdSe Nanocrystals by Cyclic Voltammetry and X-ray Photoelectron Spectroscopy

by Leonor de la Cueva, Koen Lauwaet, Roberto Otero, José M. Gallego, Concepción Alonso and Beatriz H. Juarez

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The Journal of Physical Chemistry C
DOI: 10.1021/jp4118425