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 PbSe Colloidal Quantum Dot-Based Near-Infrared Photodetector
TL;DR: In this paper, a solution-processed near-infrared (NIR) photodetector based on PbSe colloidal quantum dots (CQDs) with a field effect transistor (FET) configuration was presented.
Journal ArticleDOI
Atomic layer deposition enabling higher efficiency solar cells: A review
Md. Anower Hossain,Kean Thong Khoo,Xin Cui,Geedhika K. Poduval,Tian Zhang,Xiang Li,Wei Min Li,Bram Hoex +7 more
TL;DR: In this paper, the application of ALD layers in a wide range of solar cells is discussed, focusing on industrial silicon, thin-film, organic and quantum dot solar cells.
Journal ArticleDOI
Ethanedithiol-treated manganese oxide nanoparticles for rapidly responsive and transparent supercapacitors
TL;DR: In this paper, a 1,2-ethanedithiol (EDT) treatment was used to fix manganese oxide (Mn 3 O 4 ) NPs onto ITO current collectors without using any binders or conductive additives.
Journal ArticleDOI
High photocurrent PbSe solar cells with thin active layers
Xiaoyu Zhang,Xiaoyu Zhang,Yu Zhang,Long Yan,Changyin Ji,Hua Wu,Yu Wang,Peng Wang,Tieqiang Zhang,Yiding Wang,Tian Cui,Jun Zhao,Jun Zhao,William W. Yu,William W. Yu,William W. Yu +15 more
TL;DR: In this paper, a PbSe nanocrystal (NC)-based solar cells with thin active layers were fabricated using a ligand exchange procedure, and an optical spacer was confirmed to be effective in improving the distribution of light field in the devices.
Journal ArticleDOI
Effects of Post-Synthesis Processing on CdSe Nanocrystals and Their Solids: Correlation between Surface Chemistry and Optoelectronic Properties
E. D. Goodwin,Benjamin T. Diroll,Soong Ju Oh,Taejong Paik,Christopher B. Murray,Cherie R. Kagan +5 more
TL;DR: In this paper, the effects of different surface chemistries on CdSe nanocrystal (NC) surface chemistry were investigated using photoconductivity measurements, showing a greater photocurrent in NC solids with greater organic ligand coverage.
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.