On converse bounds for classical communication over quantum channels

We explore several new converse bounds for classical communication over quantum channels in both the one-shot and asymptotic regimes. First, we show that the Matthews-Wehner meta-converse bound for entanglement-assisted classical communication can be achieved by activated, no-signalling assisted codes, suitably generalizing a result for classical channels. Second, we derive a new efficiently computable meta-converse on the amount of classical information unassisted codes can transmit over a single use of a quantum channel. As applications, we provide a finite resource analysis of classical communication over quantum erasure channels, including the second-order and moderate deviation asymptotics. Third, we explore the asymptotic analogue of our new meta-converse, the $\Upsilon$-information of the channel. We show that its regularization is an upper bound on the classical capacity, which is generally tighter than the entanglement-assisted capacity and other known efficiently computable strong converse bounds. For covariant channels we show that the $\Upsilon$-information is a strong converse bound.Comment: v3: published version; v2: 18 pages, presentation and results improve

Additional file 4: Table S3. of Evolution, gene expression profiling and 3D modeling of CSLD proteins in cotton

Comparison of ML and Bayesian trees based on three alignments (Kalign, Mafft and Muscle) using Ktreedist. (DOCX 33 kb

Additional file 5: Figure S1. of Evolution, gene expression profiling and 3D modeling of CSLD proteins in cotton

The different topologies of cotton CSLD trees reconstructed from ML and Bayesian based on three alignments and the elision strategy. Support values are shown for A. thaliana-cotton and cotton CSLD nodes using different color circles as bootstrap proportions/SH-like aLRT scores/Bayesian posterior probabilities. The cotton CSLD protein clades are indicated by different colors. “Other CSLD” indicates the CSLD proteins from other plant species. (TIFF 2007 kb

Low-Work-Function, ITO-Free Transparent Cathodes for Inverted Polymer Solar Cells

A low-work-function, indium tin oxide (ITO)-free transparent cathode having a tin oxide (SnO_X)/Ag/SnO_X/bismuth oxide (Bi₂O₃) (SASB) structure is developed without using annealing treatment. This represents the first time that Bi₂O₃ has been introduced to lower the work function of transparent electrodes. The SASB transparent cathode exhibits excellent photoelectric properties with a maximum transmittance of ∼88%, a low sheet resistance of ∼9.0 Ω·sq^–1, and a suitable work function of 4.22 eV that matches the lowest unoccupied molecular orbital level of the acceptor for exacting electrons efficiently. The power conversion efficiency of the polymer solar cell with the SASB electrode is 6.21%, which is comparable to that of ITO-based devices. The results indicate that SASB is a good alternative to ITO as transparent cathodes in optoelectronic devices

Additional file 14: Table S14. of Evolution, gene expression profiling and 3D modeling of CSLD proteins in cotton

The relative expression level of CSLD genes of G. hirsutum by comparative 2-ΔΔCT method using qRT-PCR. (XLSX 10 kb

Efficient Perovskite Solar Cells Based on Multilayer Transparent Electrodes through Morphology Control

A multilayer transparent electrode WO₃/Ag/WO₃ (WAW) has been introduced into perovskite solar cells (PSCs). It is found that the substrate has an obvious effect on the perovskite morphology and crystallization and thus power conversion efficiency (PCE) of the PSCs. The precursor composition and its effect on the morphology, crystal, and device properties of the perovskite films based on WAW and ITO electrodes have been investigated in detail. When the CH₃NH₃I (MAI):PbI₂ molar ratio is 1.04:1, the perovskite film shows flat and dense morphology formed by the complete reaction of MAI and PbI₂, and PSC device shows the maximum PCE value of 9.73%, comparable with the controlled device with the MAI:PbI₂ molar ratio of 1:1 based on ITO electrode (10.51%). Meanwhile, a flexible PSC based on WAW transparent electrode has also been fabricated, which exhibits a PCE of 8.04%, indicating that WAW multilayer transparent electrodes have the potential application in PSCs, especially in flexible PSCs

Additional file 10: Table S15. of Evolution, gene expression profiling and 3D modeling of CSLD proteins in cotton

Model validation scores of the full-length GrCSLD1 protein. (DOCX 22 kb

Additional file 11: Table S4, 5 and 6. of Evolution, gene expression profiling and 3D modeling of CSLD proteins in cotton

The source of transcriptome data from G. hirsutum, G. arboreum and G. raimondii. (XLSX 12 kb

Additional file 9: Figure S4. of Evolution, gene expression profiling and 3D modeling of CSLD proteins in cotton

Multiple sequence alignments of GrCSLD1, GhCESA1, BcsA and ATCSLD1. The secondary structure of GrCSLD1 was calculated using the DSS algorithm of PyMOL. The violet cylinders, yellow arrows, and black lines indicate the α-helices, β-strand and coil of GrCSLD1; the red rectangles and yellow rectangles indicate the α-helices and β-strand of GhCESA1, and the red lines and yellow lines indicate the α-helices and β-strand of BcsA. The plant-conserved region (P-CR) and class-specific region (CSR) are highlighted with blue and green lines. Large red letters indicate sites of episodic positive selection in GrCSLD1. (TIFF 4834 kb

Harvesting Triplet Excitons with Exciplex Thermally Activated Delayed Fluorescence Emitters toward High Performance Heterostructured Organic Light-Emitting Field Effect Transistors

The utilization of triplet excitons plays a key role in obtaining high emission efficiency for organic electroluminescent devices. However, to date, only phosphorescent materials have been implemented to harvest the triplet excitons in the organic light-emitting field effect transistors (OLEFETs). In this work, we report the first incorporation of exciplex thermally activated delayed fluorescence (TADF) emitters in heterostructured OLEFETs to harvest the triplet excitons. By developing a new kind of exciplex TADF emitter constituted by m-MTDATA (4,4′,4″-tris­(<i>N</i>-3-methylphenyl-<i>N</i>-phenylamino)­triphenylamine) as the donor and OXD-7 (1,3-bis­[2-(4-<i>tert</i>-butylphenyl)-1,3,4-oxadiazo-5-yl]­benzene) as the acceptor, an exciton utilization efficiency of 74.3% for the devices was achieved. It is found that the injection barrier between hole transport layer and emission layer as well as the ratio between donor and acceptor would influence the external quantum efficiency (EQE) significantly. Devices with a maximum EQE of 3.76% which is far exceeding the reported results for devices with conventional fluorescent emitters were successfully demonstrated. Moreover, the EQE at high brightness even outperformed the result for organic light-emitting diode based on the same emitter. Our results demonstrate that the exciplex TADF emitters can be promising candidates to develop OLEFETs with high performance