Session Index

High-efficiency blue triplet-triplet fusion fluorescence organic light-emitting diode was demonstrated with external quantum efficiency of 9.4% and CIE coordinates of (0.14, 0.17).

 

Iridium(III) complexes 1 and 2 were employed as representative dopant in fabrication of blue PhOLED devices. The OLED devices gave turn-on voltage of 4.3 and 4.3 V, max. EQE 16.3 and 12.2 %, power efficiencies of 17.6 and 10.4 lmW‒1 and CIEx,y coordinates of (0.16, 0.26) and (0.16, 0.20).

 

Three donor-acceptor molecules consisting of dicyano-imidazole and phenylcarbazole were synthesized and applied to the host materials. Combined the balanced carrier mobility with the proper device designs in this study, the efficiency roll-off under high luminance can be greatly reduced, and the practicality of the resulting OLEDs can be significantly improved.

 

In this report, a novel host material for blue phosphorescent organic light-emitting diode (OLED) was demonstrated with maximum external quantum efficiency (EQE) of 17.92 %, current efficiency of 42.5 cd/ A and power efficiency of 44.5 lm/ W.

 

In this research, deep blue organic light emitting diode based on hydroxynaphthyridineDerived Group III metal chelates, AlmmND3, as non-doped emitting layer (EML) was demonstrated. By optimizing the thicknesses of EML, maximum external quantum efficiency (EQE) reached 1.92% for 30 nm of EML with CIE coordinates of (0.15, 0.07).

 

Improving the device performance of green phosphorescent organic light-emitting diodes (OLEDs) has been realized by employing the charge generation layer (CGL) to connect two light-emitting units. The remarkable results show that the external quantum efficiency and current efficiency of the tandem structure are two times of the reference device.

 

Three donor-acceptor molecules consisting of dicyano-imidazole and phenylcarbazole were synthesized and applied to the host materials. Combined the balanced carrier mobility with the proper device designs in this study, the efficiency roll-off under high luminance can be greatly reduced, and the practicality of the resulting OLEDs can be significantly improved.

 

In this report, a new near-infrared (NIR) emitter has been applied to the NIR phosphorescent organic light-emitting diodes (PhOLED), which showed peak emission of electroluminescence at 682 nm and exhibited the device efficiency with a maximum external quantum efficiency of 4.81%.

 

Preparation for OLEDs is time-consuming, this study brings up a fast-screening method for exciplex by measuring photoluminescence spectra in a comparatively high polar solvent. Exciplex was further confirmed by phosphorescence as well as transient photoluminescence decay. The results indicate that this method could promote the rapid development of exciplex research.

 

Two bipolar host materials including ImM-s-Cz and ImM-mCP were proposed for realizing high-performance OLEDs. The two synthesized compounds possess balanced electron/hole transport capability, which can help expand the recombination region and thereby reduce triplet-triplet annihilation. The results demonstrate that the devices can achieve high efficiency in a high luminance range.

 

Pt(II) complex K416 was dopant in fabrication of OLED devices with varied doping ratio, with 1 wt.% of K416 in SimCP host exhibited max. EQE of 5.8% and CIEx,y coordinates of 0.20, 0.31. In contrast, 100 wt.% of K416 achieved max. EQE of 26.8% and CIEx,y coordinates of 0.41, 0.55.



 

A fluorescent film is formed using the solution and spin-coating method. The thickness of the film is only around 10 μm with its QY more than 80%. Based on FTIR measurement, comparison of resonance of functional group with the QY reveals that the lower the displacement, the higher the QY.

 

In recent years, displays are constantly seeking new breakthroughs, pursuing better resolution or more vivid colors for 3C product, even applications in VR/AR. In this work, we developed 64×32 inline structure Micro-LED array display by various bonding methods combined with glass circuit connecting passive matrix IC drive.

 

a-IGZO TFTs with gate electrodes monolithically integrated with wireless rectifier circuits are demonstrated. The wireless rectifier circuit is composed of a coil, a Ni/a-IGZO Schottky diode and two capacitors. The output voltage of the wireless rectifier circuit and electrical performance of the a-IGZO TFT with wireless power supply are investigated.

 

Al/Hf co-doped ZnO nanolaminates are grown by atomic layer deposition. Thin film transistor of Al/Hf co-doped ZnO with thickness ratio of 1:10 exhibits excellent performance with field effect mobility of 3.6 cm^2/Vs, On/Off ratio of over 10^6 and subthreshold swing of 2.97 V/decade.

 

We report on a single-exposure photo-alignment using a spatial light modulator (SLM) which is able to provide spatially variant two-dimensional modulation of a light beam and a QWP. The combination of the SLM and the QWP enables arbitrary patterned alignments of LC molecules realized by single exposure.

 

In previous work, we have demonstrate that using repetitively applied field (RAF) to reconfigure blue-phase liquid crystals into stable orthorhombic and tetragonal lattices. In this work, we use the same approach applied in different thickness of BPLC, then we discuss the lattice distortion and observe efficient electro-optic response after polymer-stabilized.

 

Applying a continuous field to the blue phase will generate a large heat accumulation, which will concentrate the BP lattice and make the non-cubic lattice unstable. The RAF technology can be used between field and field that has enough time to dissipate the heating, making the stable stretched non-cubic lattice.

 

The characteristic of plasmonic random lasers (PRLs) from dye-doped liquid crystals inside the PCFs without and with addition of silver nanoparticles (AgNPs) have been invesitgiated. Through pump energy increased, the intense light scattering as well as the increase in output intensity of RLs were obvious with the addition of AgNPs.

 

This work proposes a simple photo-alignment exposure system for fabricating liquid crystal Pancharatnam-Berry phase optical elements (LCPBOEs) by using a LCPBOE that satisfies half-wave condition as a mask. A polarization grating, which is a kind of LCPBOEs, was successfully demonstrated to prove our concept and characterized.

 

An approach to narrow the bandwidth of a light source is proposed. The chiral azobenzene-doped cholesteric liquid crystal (CAdCLC) cell is divided into two regions having two different pitch lengths. The wideband light source becomes a narrow one if it travels through two regions of the CAdCLCs cell.

 

We prepare that by incorporating trioctylphosphine oxide capping ligand into the oleic acid/oleylamine system, CsPbBr1.2I1.8 quantum dots with excellent optoelectronic properties can be achieved. When the morphology of the QDs film with aqueous lead nitrate was modified during coating, a maximum luminosity of 502.7 cd/m2 was achieved for the QDLEDs.

 

Fluorescent dyes are combined with the film-forming polymer in the solvent to form a fluorescent solution. Its quantum yield is 92.3 %. We use the self-made high-efficiency fluorescent solution to deposit on substrates to form a fluorescent film, which can maintain its luminous properties without being encapsulated in the atmosphere.