Film review - State Funeral (2019)

Review of Sergei Loznitsa's film State Funeral (2019)

RESEARCH OF ENERGY EFFICIENCY OF PROCESSING BY PULSE BARRIER DISCHARGE OF WATER IN A DROP-FILM STATE

The energy efficiency of a pulsed barrier discharge in air was investigated when it treated a model water sample in a drop-film state containing an organic dye (methylene blue) with an initial concentration of 50 mg/l. The water consumption was 4 l / min, the characteristic droplet diameter was ~1 mm. Water treatment was carried out in a coaxial discharge chamber with a gas gap of 3.2 mm and additionally in an ozonation chamber. The discharge was generated by short ~ 100 ns voltage pulses of ≈26 kV, which provided a current density with an amplitude of ≈1.3 A/cm2 and a pulse energy of ≈ 140 mJ. The time of decomposition of the impurity and the energy efficiency of the discharge were investigated as a function of the pulse repetition rate of 25−300 Hz. The discharge had the highest energy efficiency at frequencies of 25-50 Hz, at which the energy yield corresponding to 50% decomposition of the impurity is about 100 g/kW h. It is shown that most of ozone, one of the main oxidants generated by the discharge, dissolves in water in the discharge chamber. The concentration of ozone at the outlet from the discharge chamber can reach 2.2 mg/l. The remaining ozone is absorbed by the model solution (about 60%) in the ozonization chamber. References 16, figures 7.

High-Performance Non-doped Blue OLEDs based on Efficiently Triplet-Triplet Upconversion and Aggregation-induced Emission

Triplet-triplet upconversion (TTU), where two low-energy triplet excitons are converted to one higher energy singlet exciton, is excellent approach to break through the theoretical limit of the pure fluorescent organic light-emitting diodes (OLEDs) by 5%. To data, however, the reported emitters with high emission efficiency and efficiently TTU in film state are rare. Herein, we design the blue aggregation-induced emission luminogens (AIEgens) and investigate their upconversion efficiency. TPA-An-mPhCz can not only achieve high emission efficiency in the film state, but also show high upconversion efficiency of close to 50% even though the calculated energy level of the triplet excitons (T₂) is lower than 2T₁. A possible upconversion mechanism is proposed according to the transient electroluminescence spectra and theoretical calculation. This strategy may provide a new platform for the construction of highly efficient non-doped blue OLEDs based on TTU and AIEgens.

High-Performance Non-doped Blue OLEDs based on Efficiently Triplet-Triplet Upconversion and Aggregation-induced Emission

Triplet-triplet upconversion (TTU), where two low-energy triplet excitons are converted to one higher energy singlet exciton, is excellent approach to break through the theoretical limit of the pure fluorescent organic light-emitting diodes (OLEDs) by 5%. To data, however, the reported emitters with high emission efficiency and efficiently TTU in film state are rare. Herein, we design the blue aggregation-induced emission luminogens (AIEgens) and investigate their upconversion efficiency. TPA-An-mPhCz can not only achieve high emission efficiency in the film state, but also show high upconversion efficiency of close to 50% even though the calculated energy level of the triplet excitons (T₂) is lower than 2T₁. A possible upconversion mechanism is proposed according to the transient electroluminescence spectra and theoretical calculation. This strategy may provide a new platform for the construction of highly efficient non-doped blue OLEDs based on TTU and AIEgens.

“Simple” AIEgens for Non-doped Solution-Processed OLEDs with Emission Close to Pure Red in sRGB Gamut

<p>Herein, two red luminogens with aggregation-induced emission (AIE) characteristics based on simple D–A structures with high performance in the film state are explored. Efficient non-doped solution-processed organic light emitting diodes (OLEDs) are fabricated and emit bright red electroluminescence at 652 nm and 711 nm, respectively. Most importantly, they exhibit CIE coordinates of (0.63, 0.36) and (0.64, 0.35), respectively, which are close to that of primary red color (0.63, 0.34) according to the digital television standard.</p>

“Simple” AIEgens for Non-doped Solution-Processed OLEDs with Emission Close to Pure Red in sRGB Gamut

<p>Herein, two red luminogens with aggregation-induced emission (AIE) characteristics based on simple D–A structures with high performance in the film state are explored. Efficient non-doped solution-processed organic light emitting diodes (OLEDs) are fabricated and emit bright red electroluminescence at 652 nm and 711 nm, respectively. Most importantly, they exhibit CIE coordinates of (0.63, 0.36) and (0.64, 0.35), respectively, which are close to that of primary red color (0.63, 0.34) according to the digital television standard.</p>