Session Index

Display Technology

Poster Session I
Friday, Dec. 4, 2020  15:40-17:30
Presider: Prof. Tien-Lung Chiu
Room: 6AB Courtyard
Manuscript ID.  0566
Paper No.  2020-FRI-P0701-P001
Hung Yi Lin
Award Candidate
High-efficiency blue triplet-triplet fusion fluorescence organic light-emitting diodes
Chia Hsun Chen;Bo Yen Lin;Tien Lung Chiu;Chi Feng Lin;Jiun Haw Lee;Hung Yi Lin

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).

Manuscript ID.  0073
Paper No.  2020-FRI-P0701-P002
Award Candidate
Blue Organic Light Emitting Diodes Based on Iridium(III) Phosphors

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).

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Manuscript ID.  0358
Paper No.  2020-FRI-P0701-P003
Ai Tsao
Award Candidate
True-blue TADF OLEDs with Dicyano-imidazole-based Molecules
Ai Tsao;Wei-Han Lin;Jhao-Cheng Lu;Chih-Hao Chang;Rong-Huei Yi;Chin-Wei Lu;Hsiang-Ling Shen

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.

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Manuscript ID.  0778
Paper No.  2020-FRI-P0701-P004
Kun-Rong Lin
Award Candidate
Novel Host Material for Blue Phosphorescent Organic Light-Emitting Diodes
Kun-Rong Lin;Chia-Hsun Chen;Bo-Yen Lin;Tien-Lung Chiu;Dalius Gudeika;Jiun-Haw Lee

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.

Manuscript ID.  0692
Paper No.  2020-FRI-P0701-P005
Chia-Hsun Chen
Award Candidate
Deep Blue Organic Light Emitting Diode Based on Hydroxynaphthyridine-Derived Group III Metal Chelates with Different Thicknesses of Emitting Layer
Chia-Hsun Chen;Tien-Lung Chiu;Chin-Ti Chen;Jiun-Haw Lee

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).

Manuscript ID.  0761
Paper No.  2020-FRI-P0701-P006
Wei-Yu Chen
Award Candidate
Green tandem OLED with high efficiency and low driving voltage
Wei-Yu Chen;Yi-Nan Lin;Chih-Chien Lee;Shun-Wei Liu

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.

Manuscript ID.  0356
Paper No.  2020-FRI-P0701-P007
Shan-Yu Chen
Award Candidate
Efficient green OLEDs with dicyano-imidazole-based host materials to realize high luminance
Shan-Yu Chen;Ming-Han Wu;Ming-Jun Lin;Chih-Hao Chang;Rong-Huei Yi;Chien-Hsiang Lin;Yu-Chuan Fang;Hsiang-Ling Shen;Chin-Wei Lu

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.

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Manuscript ID.  0487
Paper No.  2020-FRI-P0701-P008
Tse-Ying Chen
Award Candidate
Near-infrared phosphorescence organic light emitting diode (PhOLED) with a new emitter
Tse-Ying Chen;Bo-Yen Lin;Hagos Tesfay;Chin-Ti Chen;Jiun-Haw Lee;Yu-Cheng Chiu;Tien-Lung Chiu

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%.

Manuscript ID.  0353
Paper No.  2020-FRI-P0701-P009
Chen-Hsun Wu
Award Candidate
Method for rapid screening the formation of an Exciplex
Chen-Hsun Wu;I-Hsuan Chuang;Chih-Hao Chang;Chih-Chieh Tsai;Chin-Wei Lu

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.

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Manuscript ID.  0357
Paper No.  2020-FRI-P0701-P010
Award Candidate
Research on bipolar host compounds consisting of dicyanimidazole and phenylcarbazole moieties
YEH-HSIANG TSENG;Dun-Cheng Huang;Cheng-Yung Ho;Shian-Sung Chiou;Chih-Hao Chang;Rong-Huei Yi;Ya-Chun Lei;Chien-Tzu Chiu;Chin-Wei Lu

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.

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Manuscript ID.  0074
Paper No.  2020-FRI-P0701-P011
Chang-Lun Ko
Award Candidate
Versatile Pt(II) Metal Phosphors: Emission Fine-Tuned by Stacking Assemblies
Chang-Lun Ko;Wen-Yi Hung

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.

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Manuscript ID.  0583
Paper No.  2020-FRI-P0701-P012
Han-Yu Tsai
Award Candidate
Comparing Quantum Yield of High-Efficiency Rare Earth-Free Fluorescent Materials with its Resonance of Functional Groups
Han-Yu Tsai;Yi-Shan Lin;Jung-Kuan Huang;Ching-Fuh Lin

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.

Manuscript ID.  0216
Paper No.  2020-FRI-P0701-P013
Wang Chi-Han
Award Candidate
Inline structure Micro-LED array display bonding process on glass circuit
Horng Ray-Hua;Chen Yi-Fan;Wang Chi-Han;Chen Hung-Yu

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.

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Manuscript ID.  0390
Paper No.  2020-FRI-P0701-P014
Yu Hsin Kuo
Award Candidate
a-IGZO TFT with Wireless Gate Structure
Yu Hsin Kuo;Kuan Ju Chen;Shu Ming Hsu;I Chun Cheng

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.

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Manuscript ID.  0094
Paper No.  2020-FRI-P0701-P015
Chuan Hui Ong
Al/Hf co-doped zinc oxide nanolaminate transparent thin film transistors
Chuan Hui Ong;Tsong-Sheng Lay

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.

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Manuscript ID.  0171
Paper No.  2020-FRI-P0701-P016
Award Candidate
Single-exposure photo-alignment system using a spatial light modulator

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.

Manuscript ID.  0245
Paper No.  2020-FRI-P0701-P017
Wei-Yuan Chen
Award Candidate
RAF-induced lattice reconfiguration in various thickness of blue phase liquid crystal
Wei-Yuan Chen

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.

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Manuscript ID.  0203
Paper No.  2020-FRI-P0701-P018
Po-Chang Chen
Heating effect in field-induced lattice distortion in BPLC
Po-Chang Chen;Tsung- Hsien Lin

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.

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Manuscript ID.  0703
Paper No.  2020-FRI-P0701-P020
Chen-Rui Xie
Award Candidate
Plasmonic Random laser from dye-doped liquid crystal in photonic crystal fiber
Kasimayan Uma;Ja-Hon Lin;Chen-Rui Xie

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.

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Manuscript ID.  0209
Paper No.  2020-FRI-P0701-P021
Simple fabrication of Pancharatnam-Berry phase optical elements

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.

Manuscript ID.  0749
Paper No.  2020-FRI-P0701-P022
Narrow light source bandwidth using chiral azobenzene-doped cholesteric liquid crystals

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.

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Manuscript ID.  0333
Paper No.  2020-FRI-P0701-P023
Wei-Chen Chiang
Surface engineering of Perovskite CsPbBr1.2I1.8 Quantum Dots Light-Emitting Diodes Using Trioctylphosphine Oxide Capping Ligand
Wei-Chen Chiang;Yen-Hung Tien;Ching-Ho Tien;Lung-Chien Chen

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.

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Manuscript ID.  0594
Paper No.  2020-FRI-P0701-P024
Fu-Jung Wu
High-Efficiency Organic Fluorescent Solution and Water-Resistant Fluorescent Film
Teng-Yi Huang;Jung-Kuan Huang;Fu-Jung Wu;Ching-Fuh Lin

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.