scholarly journals A compact planar low-energy-gap molecule with a donor–acceptor–donor nature based on a bimetal dithiolene complex

2015 ◽  
Vol 51 (87) ◽  
pp. 15796-15799 ◽  
Author(s):  
Mikihiro Hayashi ◽  
Kazuya Otsubo ◽  
Tatsuhisa Kato ◽  
Kunihisa Sugimoto ◽  
Akihiko Fujiwara ◽  
...  

We prepared a compact, planar, low-energy-gap molecule with donor–acceptor–donor (D–A–D) nature for the first time based on a bimetal dithiolene complex.

2013 ◽  
Vol 1 (16) ◽  
pp. 5165 ◽  
Author(s):  
Abdulaziz A. B. Alghamdi ◽  
Darren C. Watters ◽  
Hunan Yi ◽  
Solyman Al-Faifi ◽  
Mohammed S. Almeataq ◽  
...  

2014 ◽  
Vol 2 (15) ◽  
pp. 5427-5433 ◽  
Author(s):  
Shugang Li ◽  
Zhongcheng Yuan ◽  
Jianyu Yuan ◽  
Ping Deng ◽  
Qing Zhang ◽  
...  

An expanded isoindigo unit (IBTI) has been incorporated into a donor–acceptor conjugated polymer for the first time. The PCE of the solar cell device based on the new polymer reached 6.41% with a fill factor of 0.71.


2015 ◽  
Vol 1737 ◽  
Author(s):  
Rebecca Isseroff ◽  
Zhenhua Yang ◽  
Jessica Kim ◽  
Andrew Chen ◽  
Miriam Rafailovich

ABSTRACTIn this study, an “inverted” design, phase-separated morphology and gold-functionalized reduced graphene oxide (Au-rGO) were used to address exciton recombination and poor Fermi level alignment. To increase efficiencies, a unique methodology was used to coat Au-rGO on top of the active layer. When 0.05 Au-rGO was blended with the active layer, there were metal-thiolate bonds with P3HT and π-π stacking with PCBM. However, KPFM, measured for the first time for this material, showed that the while 0.05mM Au-rGO reduced the energy gap between P3HT and PBCM, this was offset by recombination. KPFM showed that Au-rGO may be better suited between the active layer and electrode. When 0.5mM Au-rGO was coated on top of the active layer, efficiency increased (p<0.002) nearly 600%, suggesting that Au-rGO is a more effective acceptor than a constituent of the active layer.


2015 ◽  
Vol 51 (75) ◽  
pp. 14179-14182 ◽  
Author(s):  
Hung-Chin Wu ◽  
Jicheng Zhang ◽  
Zhishan Bo ◽  
Wen-Chang Chen

Solution processable star-shaped donor–acceptor conjugated molecules are explored for the first time as charge storage materials for resistor-type memory devices with a triphenylamine (donor) core, and three 1.8-naphthalimide (acceptors) end-groups.


2020 ◽  
Vol 643 ◽  
pp. L14
Author(s):  
◽  
V. A. Acciari ◽  
S. Ansoldi ◽  
L. A. Antonelli ◽  
A. Arbet Engels ◽  
...  

We report the detection of pulsed gamma-ray emission from the Geminga pulsar (PSR J0633+1746) between 15 GeV and 75 GeV. This is the first time a middle-aged pulsar has been detected up to these energies. Observations were carried out with the MAGIC telescopes between 2017 and 2019 using the low-energy threshold Sum-Trigger-II system. After quality selection cuts, ∼80 h of observational data were used for this analysis. To compare with the emission at lower energies below the sensitivity range of MAGIC, 11 years of Fermi-LAT data above 100 MeV were also analysed. From the two pulses per rotation seen by Fermi-LAT, only the second one, P2, is detected in the MAGIC energy range, with a significance of 6.3σ. The spectrum measured by MAGIC is well-represented by a simple power law of spectral index Γ = 5.62 ± 0.54, which smoothly extends the Fermi-LAT spectrum. A joint fit to MAGIC and Fermi-LAT data rules out the existence of a sub-exponential cut-off in the combined energy range at the 3.6σ significance level. The power-law tail emission detected by MAGIC is interpreted as the transition from curvature radiation to Inverse Compton Scattering of particles accelerated in the northern outer gap.


Author(s):  
Robert G. Lawson

Did Alex Arnold kill Betty Gail Brown? I have been asked that question hundreds of times and have never found it easy to answer. My difficulty with the question began almost as soon as I saw Arnold for the first time, in a jail cell in Lexington two or three days after he had confessed to the killing and been charged with murder. Although Arnold was not at the time hallucinating about mind-reading machines or talking to creatures on the walls of his jail cell, he was quite obviously still suffering mental impairments. He had lost his access to alcohol a little more than a week earlier and had been sitting alone in jail for most of that period; he seemed to have passed through the worst of his withdrawal symptoms, but was not even close to a total escape from the consequences of at least ten years of drunkenness. He had lost the “good feelings” he gained from drinking (elevated mood, self-confidence, and nonexistent inhibitions) and had found in their place high anxiety, low energy, some disorientation, and a crystal-clear desire to be left alone. It was under these conditions, speaking very softly and seeming almost to be talking to himself, that he said, “I killed her.” Had he made this statement under normal circumstances, in a clean and clear state of mind, it would have been easy to believe that the state had found the killer of Betty Gail Brown. But the circumstances under which the statement was made were far from normal, although they were much closer to normal that those that prevailed a few days earlier when he signed the confession that led to his prosecution for murder....


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