Near-infrared photoactive Ag-Zn-Ga-S-Se quantum dots for high-performance quantum dot-sensitized solar cells

• Roopakala Kottayi,
• Ilangovan Veerappan and
• Ramadasse Sittaramane

Beilstein J. Nanotechnol. 2022, 13, 1337–1344, doi:10.3762/bjnano.13.110

• is shown in Figure 6b. From this, the average lifetime (τs) of AZGSSe/TiO2 was found to be 18.92 ns. Then the rate constant (Keff) of the electron transfer is calculated to be 2.9 × 107 s−1 from the equation: where τ(AZGSSe/TiO2) is the average electron lifetime of AZGSSe/TiO2 and τ(AZGSSe QDs) is

Electromigration-induced formation of percolating adsorbate islands during condensation from the gaseous phase: a computational study

• Alina V. Dvornichenko,
• Vasyl O. Kharchenko and
• Dmitrii O. Kharchenko

Beilstein J. Nanotechnol. 2021, 12, 694–703, doi:10.3762/bjnano.12.55

• back into a gaseous phase with the rate kd0 = exp(−Edes/T); Edes is the activation energy for desorption. The desorption rate kd0 defines the average lifetime of the adatom on the layer τd in the common way: τd = [kd0]−1. By considering adatoms as interacting mobile particles, the desorption rate is

Luminescence of Tb₃Al₅O₁₂ phosphors co-doped with Ce³⁺/Gd³⁺ for white light-emitting diodes

• Yu-Guo Yang,
• Lei Wei,
• Jian-Hua Xu,
• Hua-Jian Yu,
• Yan-Yan Hu,
• Hua-Di Zhang,
• Xu-Ping Wang,
• Bing Liu,
• Cong Zhang and
• Qing-Gang Li

Beilstein J. Nanotechnol. 2019, 10, 1237–1242, doi:10.3762/bjnano.10.123

• average lifetime (τ*) can be calculated through The calculated τ* values for Tb2.96−xCe0.04GdxAl5O12 with x = 0, 0.05, 0.10, 0.15, 0.20, and 0.25 are 35.23, 31.46, 28.52, 26.37, 23.58 and 19.45 ns, respectively. The thermal stability of a phosphor is crucial for its applications in WLEDs. Thus, the

Co-reductive fabrication of carbon nanodots with high quantum yield for bioimaging of bacteria

• Jiajun Wang,
• Xia Liu,
• Gesmi Milcovich,
• Tzu-Yu Chen,
• Edel Durack,
• Sarah Mallen,
• Yongming Ruan,
• Xuexiang Weng and
• Sarah P. Hudson

Beilstein J. Nanotechnol. 2018, 9, 137–145, doi:10.3762/bjnano.9.16

• lifetime (τ) was fitted by using the Edinburgh FLS980 software package. The average lifetime () was calculated according to the following equation where Bi is the fractional contribution of the time-resolved decay lifetime of τi. To further prove and demonstrate the fluorescent features of the C-dots, the

Changes of the absorption cross section of Si nanocrystals with temperature and distance

• Michael Greben,
• Petro Khoroshyy,
• Sebastian Gutsch,
• Daniel Hiller,
• Margit Zacharias and
• Jan Valenta

Beilstein J. Nanotechnol. 2017, 8, 2315–2323, doi:10.3762/bjnano.8.231

• Si NCs cannot be considered as independent on experimental conditions and sample parameters. Keywords: absorption cross section; average lifetime; nanocrystal distance; photoluminescence decay; silicon nanocrystals; Introduction For decades, silicon – an abundant, nontoxic material with high

• this paper: Average lifetime calculations Though very often PL transients of Si NCs are well fitted by stretched exponential function [1], there is a number of reports where stretched exponential fit fails for both colloidal [19][20] and matrix-embedded NCs [21][22]. Instead, sometimes a log-normal

• values. This indicates an independence of the average lifetime on fitting models, and each model describes the PL decay curves quite well. As expected [10], an increase of excitation power results in shortening of both ON and PL lifetimes (Figure 2b). Also the PL kinetics become more non-exponential, i.e

Three-in-one approach towards efficient organic dye-sensitized solar cells: aggregation suppression, panchromatic absorption and resonance energy transfer

• Jayita Patwari,
• Samim Sardar,
• Bo Liu,
• Peter Lemmens and
• Samir Kumar Pal

Beilstein J. Nanotechnol. 2017, 8, 1705–1713, doi:10.3762/bjnano.8.171

• that the average lifetime of the PPIX excited state (attached to Al2O3) is shortened from 13.20 to 5.47 ns when SQ2 is added to the solution. We propose FRET between the donor (PPIX) and the acceptor (SQ2) as the mechanistic explanation of the shortened lifetime of the excited donor state. The

Electronic interaction in composites of a conjugated polymer and carbon nanotubes: first-principles calculation and photophysical approaches

• Florian Massuyeau,
• Jany Wéry,
• Jean-Luc Duvail,
• Serge Lefrant,
• Abu Yaya,
• Chris Ewels and
• Eric Faulques

Beilstein J. Nanotechnol. 2015, 6, 1138–1144, doi:10.3762/bjnano.6.115

• energy Eexc = 3.1 eV and for different SWNT mass percentages x. (b) Ultrafast PL dynamics at emission 2.25 eV (band 2). Solid lines are fits to the data with the bi-exponential model given by Equation 1 (see text). Inset: average lifetime and relative populations of photoexcitations in the composite

Charge carrier mobility and electronic properties of Al(Op)₃: impact of excimer formation

• Andrea Magri,
• Pascal Friederich,
• Bernhard Schäfer,
• Valeria Fattori,
• Xiangnan Sun,
• Timo Strunk,
• Velimir Meded,
• Luis E. Hueso,
• Wolfgang Wenzel and
• Mario Ruben

Beilstein J. Nanotechnol. 2015, 6, 1107–1115, doi:10.3762/bjnano.6.112

• in CH2Cl2 solution (black) and as a thin film on quartz (red). In solution, a mono-exponential decay is observed with a lifetime τ ≈ 0.7 ns, while in the thin film, a multi-exponential decay is observed with an average lifetime τ ≈ 7.1 ns. Transfer curve of the Al(Op)3-based TFT with a channel length

Nanocrystalline ceria coatings on solid oxide fuel cell anodes: the role of organic surfactant pretreatments on coating microstructures and sulfur tolerance

• Chieh-Chun Wu,
• Ling Tang and
• Mark R. De Guire

Beilstein J. Nanotechnol. 2014, 5, 1712–1724, doi:10.3762/bjnano.5.181

• . (Arrows in d point to coating edges or cracks). Cross-sectional view of a sulfonate-treated anode (treatment 4) after operation. a) SEM image; b) EDXS mapping of Ni (green) and Ce (yellow). Average lifetime energy output of SOFCs (with and without GDC interlayers) tested in sulfur-containing fuel streams

Modulation of defect-mediated energy transfer from ZnO nanoparticles for the photocatalytic degradation of bilirubin

• Tanujjal Bora,
• Karthik K. Lakshman,
• Soumik Sarkar,
• Abhinandan Makhal,
• Samim Sardar,
• Samir K. Pal and
• Joydeep Dutta

Beilstein J. Nanotechnol. 2013, 4, 714–725, doi:10.3762/bjnano.4.81

• picosecond-resolved spectroscopy techniques we have recently demonstrated that both singly charged (VO+) and doubly charged (VO++) oxygen vacancy centers contribute to the energy transfer process with efficiencies of about 78% and 89%, respectively [15]. In the present study, the average lifetime (τavg) of

• was expressed as: The average lifetime (amplitude-weighted) of a multi-exponential decay [32] is expressed as In order to estimate the energy transfer efficiency (E) between the ZnO donor nanoparticles and the BR acceptor molecules, the relative fluorescence lifetime of the donor in the absence (τD

Energy-related nanomaterials

• Paul Ziemann and
• Alexei R. Khokhlov

Beilstein J. Nanotechnol. 2013, 4, 678–679, doi:10.3762/bjnano.4.76

• vehicles can at least contribute to attenuate this emission problem. Electrically powered vehicles strongly rely on fuel cell (FC) or, most importantly, lithium-ion battery (LIB) technology, which is well-known and is already used on a large scale. However, the efficiency and average lifetime of these

Horizontal versus vertical charge and energy transfer in hybrid assemblies of semiconductor nanoparticles

• Gilad Gotesman,
• Rahamim Guliamov and
• Ron Naaman

Beilstein J. Nanotechnol. 2012, 3, 629–636, doi:10.3762/bjnano.3.72

• a common practice [22][23][27][34]. This allows qualitative comparison of PL-decay profiles of the different assemblies. The fitting follows Equation 3 (solid line) where τi are the decay constants and Ai are the pre-exponential parameters. The average lifetime for each sample (<τ>) was calculated

Lifetime analysis of individual-atom contacts and crossover to geometric-shell structures in unstrained silver nanowires

• Christian Obermair,
• Holger Kuhn and
• Thomas Schimmel

Beilstein J. Nanotechnol. 2011, 2, 740–745, doi:10.3762/bjnano.2.81

• average lifetime τ was estimated as τ1 ≈ 0.29 s around the maximum at 1 G0 and τ2 ≈ 0.18 s at 2 G0. Selected average lifetimes of quantized conductance levels are listed in Table 1. These average lifetimes can be considered to be characteristic of the stability of the contacts. Table 1 shows the average

• peak at 2 G0 and 0.19 s for the peak at 4 G0. These last two values are comparable to the lifetime of the background, or even slightly less stable than the background in between the maxima, here given for the example of 1.5 G0, which shows an average lifetime of τ = 0.21 s. An analysis of the entire

• G0 ± 0.25 G0 and for the conductance range of 2 G0 ± 0.25 G0 taken from the histogram of Figure 1. By fitting an exponential decay function (solid lines) in the period between 0.2 s and 1.2 s, an average lifetime of the maximum at 1 G0 was estimated as τ1 ≈ 0.29 s and at 2 G0 as τ2 ≈ 0.18 s. Full