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
Solution-processed solar-blind deep ultraviolet photodetectors based on strongly quantum confined ZnS quantum dots
Yong Xia,Guangmei Zhai,Zhi Zheng,Linyuan Lian,Huan Liu,Daoli Zhang,Jianbo Gao,Tianyou Zhai,Jianbing Zhang +8 more
TL;DR: In this paper, a colloidal ZnS quantum dot (QD) was used to synthesize solar-blind DUV photodetectors with a bandgap in the solar blind region.
Journal ArticleDOI
PbSe nanocrystal shape development: oriented attachment at mild conditions and microwave assisted growth of nanocubes
TL;DR: In this paper, high-resolution transmission electron microscopy has been used to investigate the interface between size selected PbSe nanocrystals obtained via hot injection process at 160 °C, the quality of the interface, after removal of capping ligands, strongly depends on the structure and stoichiometry of the surface.
Journal ArticleDOI
Capping nanoparticles with graphene quantum dots for enhanced thermoelectric performance
Yuantong Liang,Chenguang Lu,Defang Ding,Man Zhao,Dawei Wang,Chao Hu,Jieshan Qiu,Gang Xie,Zhiyong Tang +8 more
TL;DR: The general capability of graphene quantum dots to serve as capping ligands exchanging native organic stabilizers for various types of semiconductor nanoparticles affords the opportunity to engineer functional nanocomposites with remarkable thermoelectric properties.
Journal ArticleDOI
Photosensitization of ZnO rod electrodes with AgInS2nanoparticles and ZnS-AgInS2solid solution nanoparticles for solar cell applications
TL;DR: In this paper, ZnS-AgInS2 solid solution (ZAIS) was successfully immobilized on the surface of ZnO nanorod electrodes without using additional cross-linking agents.
Journal ArticleDOI
A Solution-Processed UV-Sensitive Photodiode Produced Using a New Silicon Nanocrystal Ink
TL;DR: In this paper, a solution-processed poly(3,4-ethylenedioxy-thiophene):poly(styrene sulfonate) (PEDOT: PSS) electron blocking layer and top and bottom contacts are needed along with the Si NC layer to construct the device.
References
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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
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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.