A novel tetraphenylsilane–phenanthroimidazole hybrid host material for highly efficient blue fluorescent, green and red phosphorescent OLEDs

2015 ◽  
Vol 3 (17) ◽  
pp. 4394-4401 ◽  
Author(s):  
Dong Liu ◽  
Mingxu Du ◽  
Dong Chen ◽  
Kaiqi Ye ◽  
Zuolun Zhang ◽  
...  

A novel organosilane compound Si(PPI)2 with good carrier-transport ability has been used as an efficient host for high-performance fluorescent pure-blue and phosphorescent green/red OLEDs.

2020 ◽  
Vol 8 (3) ◽  
pp. 1154-1163 ◽  
Author(s):  
Guohong Shen ◽  
Zhixiao Liu ◽  
Piao Liu ◽  
Junfei Duan ◽  
Hussein A. Younus ◽  
...  

Towards practical lithium–sulfur batteries, a highly efficient sulfur host material based on intertwined carbon-nanotubes (CNTs) and defective Prussian blue (PB) nanocrystals is developed.


Author(s):  
G. G. Vokin

The article describes the approach and topical issues of synthesis of highly efficient transportable systems for search and determination of coordinates in the areas of elements falling, separated from the missiles, taking into account the dislocation of pre-empted areas of fall and physical conditions in their territories. The principles of these systems are based on the rational integration of traditional and non-traditional information sensors of different physical nature, which record the moments of landing of separated parts of the missiles.


Author(s):  
Guillem Romero-Sabat ◽  
Elena Gago-Benedí ◽  
Joan Josep Roa Rovira ◽  
David González-Gálvez ◽  
Antonio Mateo ◽  
...  

Author(s):  
Li-Ming Chen ◽  
I-Hung Lin ◽  
Yu-Chi You ◽  
Wei-Chih Wei ◽  
Meng-Ju Tsai ◽  
...  

Three new carbazole-based hole-transporting materials PTCz-9’Cz, PTCz-3’TCz, and PTCz-NTol2 were synthesized, characterized, and examined the propensity of exciplex formation with electron-transporting material PO-T2T. Through enhancing the electron-donating ability of the...


Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 717
Author(s):  
Hassan Algadi ◽  
Ahmad Umar ◽  
Hasan Albargi ◽  
Turki Alsuwian ◽  
Sotirios Baskoutas

A low-cost and simple drop-casting method was used to fabricate a carbon nanodot (C-dot)/all-inorganic perovskite (CsPbBr3) nanosheet bilayer heterojunction photodetector on a SiO2/Si substrate. The C-dot/perovskite bilayer heterojunction photodetector shows a high performance with a responsivity (R) of 1.09 A/W, almost five times higher than that of a CsPbBr3-based photodetector (0.21 A/W). In addition, the hybrid photodetector exhibits a fast response speed of 1.318/1.342 µs and a highly stable photocurrent of 6.97 µA at 10 V bias voltage. These figures of merits are comparable with, or much better than, most reported perovskite heterojunction photodetectors. UV–Vis absorption and photoluminescent spectra measurements reveal that the C-dot/perovskite bilayer heterojunction has a band gap similar to the pure perovskite layer, confirming that the absorption and emission in the bilayer heterojunction is dominated by the top layer of the perovskite. Moreover, the emission intensity of the C-dot/perovskite bilayer heterojunction is less than that of the pure perovskite layer, indicating that a significant number of charges were extracted by the C-dot layer. The studied band alignment of the C-dots and perovskites in the dark and under emission reveals that the photodetector has a highly efficient charge separation mechanism at the C-dot/perovskite interface, where the recombination rate between photogenerated electrons and holes is significantly reduced. This highly efficient charge separation mechanism is the main reason behind the enhanced performance of the C-dot/perovskite bilayer heterojunction photodetector.


RSC Advances ◽  
2015 ◽  
Vol 5 (6) ◽  
pp. 4707-4715 ◽  
Author(s):  
Qiwei Zhang ◽  
Haiqin Sun ◽  
Tao Kuang ◽  
Ruiguang Xing ◽  
Xihong Hao

Materials emitting red light (∼611 nm) under excitation with blue light (440–470 nm) are highly desired for fabricating high-performance white light-emitting diodes (LEDs).


2017 ◽  
Vol 53 (4) ◽  
pp. 705-708 ◽  
Author(s):  
Zi-Cheng Fu ◽  
Yong Xu ◽  
Sharon Lai-Fung Chan ◽  
Wei-Wei Wang ◽  
Fang Li ◽  
...  

An anion-assisted hydrolytic H2-releasing ultra-high performance system involving ammonia borane and a CoP nanoparticle catalyst has been established under ambient conditions.


2021 ◽  
pp. 163447
Author(s):  
Muhammad Ashfaq Jamil ◽  
Ghulam Ali ◽  
Khurram Imran Khan ◽  
Faiza Jan Iftikhar ◽  
Sher Zaman ◽  
...  

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