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
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Journal ArticleDOI
Ligand engineering of colloid quantum dots and their application in all-inorganic tandem solar cells
TL;DR: In this article, the latest progress of colloidal QDs in the research of all-inorganic tandem solar cells was summarized, and the improvement of QDs surface ligands and the optimization of ligands engineering were discussed.
Journal ArticleDOI
Nanocrystal Skins with Exciton Funneling for Photosensing
TL;DR: Highly photosensitive nanocrystal (NC) skins based on exciton funneling are proposed and demonstrated using a graded bandgap profile across which no external bias is applied in operation for light-sensing, expected to enable large-area GNS-based photosensing with highly efficient full-spectrum conversion.
Journal ArticleDOI
Identifying short surface ligands on metal phosphide quantum dots.
Edwin A. Baquero,Wilfried-Solo Ojo,Yannick Coppel,Bruno Chaudret,Bernhard Urbaszek,Céline Nayral,Fabien Delpech +6 more
TL;DR: In this paper, a cross-polarization magic angle spinning (MAS) NMR was used to identify surface ligands of Cd3P2 and InP QDs.
Journal ArticleDOI
Solution processed CuSbS 2 films for solar cell applications
Michael E. Edley,Borirak Opasanont,Jason T. Conley,Hoang Tran,Sergey Y. Smolin,Siming Li,Andrew D. Dillon,Aaron T. Fafarman,Jason B. Baxter +8 more
TL;DR: In this paper, two solution-based approaches to deposit CuSbS2 films, chemical bath deposition (CBD) and deposition of colloidal nanoplates, were reported, which indicated the potential of solution-processed CuS bS2 nanplates as building blocks for photovoltaic devices.
Journal ArticleDOI
Ambipolar, low-voltage and low-hysteresis PbSe nanowire field-effect transistors by electrolyte gating
TL;DR: Low-voltage, low-hysteresis and ambipolar PbSe nanowire FETs using electrolyte-gating with ionic liquids and ion gels are reported, indicating almost completely transparent Schottky barriers and efficient ambipolar charge injection into a low band gap one-dimensional semiconductor.
References
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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.