6 research outputs found
MOESM1 of Anti-cancer effects of Gynostemma pentaphyllum (Thunb.) Makino (Jiaogulan)
Additional file 1. Additional tables
Improved Performance of Organic Light-Emitting Field-Effect Transistors by Interfacial Modification of Hole-Transport Layer/Emission Layer: Incorporating Organic Heterojunctions
Organic
heterojunctions (OHJs) consisting of a strong electron
acceptor 1,4,5,8,9,11-hexaazatriphenylene hexacarbonitrile (HAT-CN)
and an electron donor N,N′-diÂ(naphthalene-1-yl)-N,N′-diphenyl-benzidine
(NPB) were demonstrated for the first time that they can be implemented
as effective modification layers between hole transport layer (HTL)
and emission layer in the heterostructured organic light-emitting
field effect transistors (OLEFETs). The influence of both HAT-CN/NPB
junction (npJ) and NPB/HAT-CN junction (pnJ) on the optoelectronic
performance of OLEFETs were conscientiously investigated. It is found
that both the transport ability of holes and the injection ability
of holes into emissive layer can be dramatically improved via the
charge transfer of the OHJs and that between HAT-CN and the HTL. Consequently,
OLEFETs with pnJ present optimal performance of an external quantum
efficiency (EQE) of 3.3% at brightness of 2630 cdm<sup>–2</sup> and the ones with npJs show an EQE of 4.7% at brightness of 4620
cdm<sup>–2</sup>. By further utilizing npn OHJs of HAT-CN/NPB/HAT-CN,
superior optoelectronic performance with an EQE of 4.7% at brightness
of 8350 cdm<sup>–2</sup> and on/off ratio of 1 × 10<sup>5</sup> is obtained. The results demonstrate the great practicality
of implementing OHJs as effective modification layers in heterostructured
OLEFETs
Morphology and Luminescence Regulation for CsPbBr<sub>3</sub> Perovskite Light-Emitting Diodes by Controlling Growth of Low-Dimensional Phases
At present, the high defect density and strong nonradiative
recombination
rate of all-inorganic cesium lead bromide (CsPbBr3) perovskite
light-emitting diodes (PeLEDs) seriously inhibit the improvement of
their quantum efficiency. In this paper, the addition of a short-chain
additive, diethylammonium bromide (DEABr), aims to control the generation
of a quasi-2D large n-phase to optimize the surface morphology and
construct two-dimensional/three-dimensional (2D/3D) heterojunction
perovskite structures to enhance the EL efficiency of PeLEDs. Through
Kelvin probe force microscopy (KPFM) characterization, we confirmed
that the 2D phase grains with a low potential are locally formed on
the surface of the perovskite film under the action of DEABr. The
existence of the 2D phase effectively improved the surface morphology
and suppressed surface defects. In addition, the in situ constructed
2D/3D heterojunction perovskite structure further increases the exciton
radiative recombination rate and significantly improves the electroluminescent
performance. By optimizing its doping concentration, the optimal all-inorganic
PeLED displays a current efficiency (CE) of 30.3 cd A–1, an external quantum efficiency (EQE) of 9.6%, and a maximum brightness
of 32,500 cd m–2. According to our results, the
formation of 2D structures on the surface of the CsPbBr3 film can improve surface morphology issues and optoelectronic properties
of the film
Surface Plasmon Enhanced Organic Solar Cells with a MoO<sub>3</sub> Buffer Layer
High-efficiency surface plasmon enhanced
1,1-bis-(4-bisÂ(4-methyl-phenyl)-amino-phenyl)-cyclohexane:C70
small molecular bulk heterojunction organic solar cells with a MoO<sub>3</sub> anode buffer layer have been demonstrated. The optimized
device based on thermal evaporated Ag nanoparticles (NPs) shows a
power conversion efficiency of 5.42%, which is 17% higher than the
reference device. The improvement is attributed to both the enhanced
conductivity and increased absorption due to the near-field enhancement
of the localized surface plasmon resonance of Ag NPs
MOESM2 of A type-I diacylglycerol acyltransferase modulates triacylglycerol biosynthesis and fatty acid composition in the oleaginous microalga, Nannochloropsis oceanica
Additional file 2: Table S1. DGAT protein sequences used for the construction of phylogenetic tree in additional file 1: Figure S3. Table S2. Primers used in the present study. Underlined sequences designate the restriction enzyme sites. The sequences in box indicate the linker fragment introduced before GFP coding sequence
High-Performance Organic Small-Molecule Panchromatic Photodetectors
High-performance
panchromatic organic photodetectors (OPDs) containing
small molecules lead phthalocyanine (PbPc) and C<sub>70</sub> fullerene
as donor and acceptor, respectively, were demonstrated. The OPDs had
either a PbPc/C<sub>70</sub> planar heterojunction (PHJ) or a PbPc/PbPc:C<sub>70</sub>/C<sub>70</sub> hybrid planar-mixed molecular heterojunction
(PM-HJ) structure. Both the PHJ and the PM-HJ devices showed a broad-band
response that covered wavelengths from 300 to 1100 nm. An external
quantum efficiency (EQE) higher than 10% and detectivity on the order
of 10<sup>12</sup> Jones were obtained in the wavelength region from
400 to 900 nm for the PHJ device. The EQE in the near-infrared region
was enhanced by using the PM-HJ device structure, and a maximum EQE
of 30.2% at 890 nm was observed for the optimized device with a 5%
PbPc-doped C<sub>70</sub> layer. Such an EQE is the highest at this
wavelength of reported OPDs. The detectivity of the PM-HJ devices
was also higher than that of the PHJ one, which is attributed to the
increased efficiency of exciton dissociation in bulk heterojunction
structure, increased absorption efficiency caused by formation of
triclinic PbPc in the PbPc:C<sub>70</sub> mixed film when it was deposited
on a pristine PbPc layer, and high hole mobility of the PbPc-doped
C<sub>70</sub> layer