FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2000681719> ?p ?o ?g. }

• W2000681719 endingPage "173704" @default.
• W2000681719 startingPage "173704" @default.
• W2000681719 abstract "We report the experimental study of hole transport in poly(vinylcarbazole) (PVK) films doped with colloidal CdSe/ZnS core-shell quantum dots (QDs) determined using the Time-of-Flight (TOF) method. The miscibility between PVK and the QDs is improved by capping the QDs with a novel 11-(N-carbazolyl) undecanoic acid (C11) ligand instead of commonly used organic ligands, such as oleic acid. The study of the hole mobility of the pristine and doped PVK films with a doping concentration of the C11 capped QDs ranging from 1.61 × 1017 to 7.10 × 1018 dots/cm3 was performed as a function of electric field and temperature in the range of 105–106 V/cm and 298–338 K, respectively. Upon increasing the QD concentration, a decrease of hole mobility was observed by up to nearly 2 orders in magnitude at a doping concentration of 3.87 × 1018 dots/cm3 at T = 298 K. This suggests that the QDs induce shallow hole traps. The field and temperature dependence of the hole mobility was characterized using the Bassler disorder model and showed an increase of the energetic disorder (σ) from 124 to 204 meV as well as of the spatial disorder (Σ) from 0.95 to 5 when the concentration of the QDs was increased to 3.87 × 1018 dots/cm3. At higher concentration of the QDs (7.10 × 1018 dots/cm3), an increase of the hole mobility was observed suggesting hopping of the holes through the QD clusters. In addition, we also found that for this high doping concentration, the field dependence of the hole mobility was no longer in agreement with the Bassler disorder model. One should consider that at this doping concentration, the volume occupied by the inorganic (CdSe + ZnS) and organic (C11) components of the QDs in the doped film was estimated to be 14.6 and 15.8 volume %, respectively. This implies that the volume fraction of the inorganic material is very close to the percolation threshold, which amounts to 17 volume % for small spherical particles embedded in a three dimensional matrix. Furthermore, the conductivity data suggest a qualitative change in film properties between the samples with 3.87 × 1018 and 7.10 × 1018 dots/cm3. The study of film morphology by atomic force microscopy (AFM) experiment shows that while for the film with 3.87 × 1018 dots/cm3 the surface of the film has still the same features as that of a pristine PVK film, this is no longer the case for the film with 7.10 × 1018 dots/cm3, where shallow holes with a diameter of 100 to 200 nm become visible. These holes with the size much larger than the diameter of an individual QD likely correspond to clusters of the QDs. Upon further increasing the QD concentration to 9.68 × 1018 dots/cm3, the density of these holes is also increased. A correlation between the conductivity data and the film morphologies indicates that the presence of these QD clusters in the sample with 7.10 × 1018 dots/cm3 does not only change the homogeneity and roughness of the film but also leads to a significant change in the shape of the density of states of the energy sites for hopping holes resulting in a field and temperature dependence of the hole mobility that is no longer compatible with the Gaussian disorder model for this sample. Furthermore, the presence of these “hole” structures observed with AFM might imply a formation of large QD clusters in the polymer film, which form continuous pathways for charge carrier hopping between the opposite electrodes." @default.
• W2000681719 created "2016-06-24" @default.
• W2000681719 creator A5026628181 @default.
• W2000681719 creator A5027396559 @default.
• W2000681719 creator A5036215655 @default.
• W2000681719 creator A5039441491 @default.
• W2000681719 creator A5060475686 @default.
• W2000681719 creator A5064957803 @default.
• W2000681719 creator A5065975451 @default.
• W2000681719 creator A5068870927 @default.
• W2000681719 creator A5072242255 @default.
• W2000681719 creator A5077286423 @default.
• W2000681719 creator A5083581319 @default.
• W2000681719 date "2013-11-07" @default.
• W2000681719 modified "2023-09-26" @default.
• W2000681719 title "Study of hole mobility in poly(N-vinylcarbazole) films doped with CdSe/ZnS quantum dots encapsulated by 11-(N-carbazolyl) undecanoic acid (C11)" @default.
• W2000681719 cites W1964520518 @default.
• W2000681719 cites W1976120952 @default.
• W2000681719 cites W1992135182 @default.
• W2000681719 cites W1994220801 @default.
• W2000681719 cites W2000295146 @default.
• W2000681719 cites W2001892780 @default.
• W2000681719 cites W2010049615 @default.
• W2000681719 cites W2010192842 @default.
• W2000681719 cites W2018508665 @default.
• W2000681719 cites W2031882613 @default.
• W2000681719 cites W2032203546 @default.
• W2000681719 cites W2034020308 @default.
• W2000681719 cites W2035689867 @default.
• W2000681719 cites W2037705948 @default.
• W2000681719 cites W2037773093 @default.
• W2000681719 cites W2044543075 @default.
• W2000681719 cites W2061675482 @default.
• W2000681719 cites W2068574864 @default.
• W2000681719 cites W2070774414 @default.
• W2000681719 cites W2073209194 @default.
• W2000681719 cites W2078833116 @default.
• W2000681719 cites W2079031518 @default.
• W2000681719 cites W2084480097 @default.
• W2000681719 cites W2084831456 @default.
• W2000681719 cites W2087643216 @default.
• W2000681719 cites W2090741575 @default.
• W2000681719 cites W2093810900 @default.
• W2000681719 cites W2094505911 @default.
• W2000681719 cites W2098946366 @default.
• W2000681719 cites W2102402636 @default.
• W2000681719 cites W2116249942 @default.
• W2000681719 cites W2138523000 @default.
• W2000681719 cites W2149556474 @default.
• W2000681719 cites W2171554567 @default.
• W2000681719 cites W2498828123 @default.
• W2000681719 cites W2840690769 @default.
• W2000681719 doi "https://doi.org/10.1063/1.4827395" @default.
• W2000681719 hasPublicationYear "2013" @default.
• W2000681719 type Work @default.
• W2000681719 sameAs 2000681719 @default.
• W2000681719 citedByCount "6" @default.
• W2000681719 countsByYear W20006817192014 @default.
• W2000681719 countsByYear W20006817192016 @default.
• W2000681719 countsByYear W20006817192017 @default.
• W2000681719 countsByYear W20006817192019 @default.
• W2000681719 countsByYear W20006817192021 @default.
• W2000681719 countsByYear W20006817192022 @default.
• W2000681719 crossrefType "journal-article" @default.
• W2000681719 hasAuthorship W2000681719A5026628181 @default.
• W2000681719 hasAuthorship W2000681719A5027396559 @default.
• W2000681719 hasAuthorship W2000681719A5036215655 @default.
• W2000681719 hasAuthorship W2000681719A5039441491 @default.
• W2000681719 hasAuthorship W2000681719A5060475686 @default.
• W2000681719 hasAuthorship W2000681719A5064957803 @default.
• W2000681719 hasAuthorship W2000681719A5065975451 @default.
• W2000681719 hasAuthorship W2000681719A5068870927 @default.
• W2000681719 hasAuthorship W2000681719A5072242255 @default.
• W2000681719 hasAuthorship W2000681719A5077286423 @default.
• W2000681719 hasAuthorship W2000681719A5083581319 @default.
• W2000681719 hasConcept C106782819 @default.
• W2000681719 hasConcept C124657808 @default.
• W2000681719 hasConcept C127413603 @default.
• W2000681719 hasConcept C171250308 @default.
• W2000681719 hasConcept C185592680 @default.
• W2000681719 hasConcept C191897082 @default.
• W2000681719 hasConcept C192562407 @default.
• W2000681719 hasConcept C2911124769 @default.
• W2000681719 hasConcept C42360764 @default.
• W2000681719 hasConcept C49040817 @default.
• W2000681719 hasConcept C535196362 @default.
• W2000681719 hasConcept C57863236 @default.
• W2000681719 hasConceptScore W2000681719C106782819 @default.
• W2000681719 hasConceptScore W2000681719C124657808 @default.
• W2000681719 hasConceptScore W2000681719C127413603 @default.
• W2000681719 hasConceptScore W2000681719C171250308 @default.
• W2000681719 hasConceptScore W2000681719C185592680 @default.
• W2000681719 hasConceptScore W2000681719C191897082 @default.
• W2000681719 hasConceptScore W2000681719C192562407 @default.
• W2000681719 hasConceptScore W2000681719C2911124769 @default.
• W2000681719 hasConceptScore W2000681719C42360764 @default.
• W2000681719 hasConceptScore W2000681719C49040817 @default.
• W2000681719 hasConceptScore W2000681719C535196362 @default.

• next