Journal ArticleDOI
Structural, Optical and Electrical Properties of Self-Assembled Films of PbSe Nanocrystals Treated with 1,2-Ethanedithiol
TLDR
The LbL process described here is a general strategy for producing uniform, conductive nanocrystal films for applications in optoelectronics and solar energy conversion.Abstract:
We describe the structural, optical, and electrical properties of high-quality films of PbSe nanocrystals fabricated by a layer-by-layer (LbL) dip-coating method that utilizes 1,2-ethanedithiol (EDT) as an insolubilizing agent. Comparative characterization of nanocrystal films made by spin-coating and by the LbL process shows that EDT quantitatively displaces oleic acid on the PbSe surface, causing a large volume loss that electronically couples the nanocrystals while severely degrading their positional and crystallographic order of the films. Field-effect transistors based on EDT-treated films are moderately conductive and ambipolar in the dark, becoming p-type and 30–60 times more conductive under 300 mW cm−2 broadband illumination. The nanocrystal films oxidize rapidly in air to yield, after short air exposures, highly conductive p-type solids. The LbL process described here is a general strategy for producing uniform, conductive nanocrystal films for applications in optoelectronics and solar energy co...read more
Citations
More filters
Journal ArticleDOI
Robust, functional nanocrystal solids by infilling with atomic layer deposition.
Yao Liu,Markelle Gibbs,Craig L. Perkins,Jason Tolentino,Mohammad H. Zarghami,Jorge Bustamante,Matt Law +6 more
TL;DR: This work uses low-temperature atomic layer deposition (ALD) to infill conductive PbSe NC solids with metal oxides to produce inorganic nanocomposites in which the NCs are locked in place and protected against oxidative and photothermal damage.
Journal ArticleDOI
Infrared Quantum Dots: Progress, Challenges, and Opportunities
TL;DR: Recent progress in the development of infrared quantum dots both as infrared light emitters as well as infrared absorbers is summarized, focusing on how fundamental breakthroughs in synthesis, surface chemistry, and characterization techniques are facilitating the implementation of these nanostructures into exploratory device architectures aswell as in emerging applications.
Journal ArticleDOI
An Enhanced UV-Vis-NIR an d Flexible Photodetector Based on Electrospun ZnO Nanowire Array/PbS Quantum Dots Film Heterostructure.
TL;DR: This strategy is further verified on other kinds of 1D nanowires and 0D QDs, and similar enhancement on the performance of corresponding photodetecetors can be acquired, evidencing the universality of this strategy.
Journal ArticleDOI
Efficient Heterojunction Photovoltaic Cell Utilizing Nanocomposites of Lead Sulfide Nanocrystals and a Low‐Bandgap Polymer
TL;DR: While these materials will require appropriate encapsulation and proper disposal to avoid environmental contamination, they represent the best choice to achieve better light harvesting including nearand mid-infrared (IR) wavelengths.
Journal ArticleDOI
Material challenges for solar cells in the twenty-first century: directions in emerging technologies
Samy Almosni,Amaury Delamarre,Zacharie Jehl,Daniel Suchet,Ludmila Cojocaru,Maxime Giteau,Benoit Behaghel,Benoit Behaghel,Anatole Julian,Camille Ibrahim,Léa Tatry,Haibin Wang,Takaya Kubo,Satoshi Uchida,Hiroshi Segawa,Naoya Miyashita,Ryo Tamaki,Yasushi Shoji,Katsuhisa Yoshida,Nazmul Ahsan,Kentaro Watanabe,Tomoyuki Inoue,Masakazu Sugiyama,Yoshiaki Nakano,Tomofumi Hamamura,Tomofumi Hamamura,Thierry Toupance,Thierry Toupance,Céline Olivier,Céline Olivier,Sylvain Chambon,Sylvain Chambon,Laurence Vignau,Laurence Vignau,Camille Geffroy,Camille Geffroy,Eric Cloutet,Eric Cloutet,Georges Hadziioannou,Georges Hadziioannou,Nicolas Cavassilas,Pierre Rale,Andrea Cattoni,Andrea Cattoni,Stéphane Collin,Stéphane Collin,François Gibelli,M. Paire,Laurent Lombez,Laurent Lombez,Damien Aureau,Damien Aureau,Muriel Bouttemy,Muriel Bouttemy,Arnaud Etcheberry,Arnaud Etcheberry,Yoshitaka Okada,Jean-François Guillemoles,Jean-François Guillemoles +58 more
TL;DR: This research direction is reviewed, with a focus on the results obtained within a Japan–French cooperation program, NextPV, working on promising solar cell technologies, focused on efficient photovoltaic devices, such as multijunction, ultrathin, intermediate band, and hot-carrier solar cells.
References
More filters
Journal ArticleDOI
Two-dimensional charge transport in self-organized, high-mobility conjugated polymers
Henning Sirringhaus,Peter J. Brown,Richard H. Friend,Martin Nielsen,Klaus Bechgaard,B.M.W. Langeveld-Voss,A. J. H. Spiering,René A. J. Janssen,E. W. Meijer,P. T. Herwig,Dago M. de Leeuw +10 more
TL;DR: In this article, the authors used thin-film, field effect transistor structures to probe the transport properties of the ordered microcrystalline domains in the conjugated polymer poly(3-hexylthiophene), P3HT.
Journal ArticleDOI
Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymer
TL;DR: In this article, a hybrid organic/inorganic electroluminescent device was constructed based on the recombination of holes injected into a layer of semiconducting p-paraphenylene vinylene (PPV) with electrons injected into the multilayer film of cadmium selenide nanocrystals.
Journal Article
Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymer
TL;DR: In this article, a hybrid organic/inorganic electroluminescent device was constructed based on the recombination of holes injected into a layer of semiconducting p-paraphenylene vinylene (PPV) with electrons injected into the multilayer film of cadmium selenide nanocrystals.
Journal ArticleDOI
Electroluminescence from single monolayers of nanocrystals in molecular organic devices
TL;DR: A hybrid light-emitting diode (LED) that combines the ease of processability of organic materials with the narrow-band, efficient luminescence of colloidal quantum dots (QDs) is demonstrated and a 25-fold improvement in luminescent efficiency is observed.
Journal ArticleDOI
Quantum dot solar cells
TL;DR: In this article, three QD solar cell configurations are described: (1) photoelectrodes comprising QD arrays, (2) QD-sensitized nanocrystalline TiO 2, and (3) QDs dispersed in a blend of electron- and hole-conducting polymers.