Session Index

Display Technology

Poster Session I
Friday, Dec. 3, 2021  14:00-16:00
Presider: Prof. Chih-Lung Lin Prof. Shui-Hsiang Su Prof. Tien-Lung Chiu
Room: Corridor
Award Candidate (Paper Competition)
Manuscript ID.  0435
Paper No.  2021-FRI-P0701-P001
Ching-An Chih Liquid crystal privacy films using dual liquid crystal alignment structures
Ching-An Chih;Yu-Ci Huang;Ko-Ting Cheng

With the benefit from the properties of the adopted materials, such as polyhedral oligomeric silsesquioxanes (POSS), photoresist, and dichroic dyes (S428), in this study, vertical and hybrid alignments form periodic structures in a liquid crystal (LC) cell to get the same properties as privacy films.

Award Candidate (Paper Competition)
Manuscript ID.  0138
Paper No.  2021-FRI-P0701-P002
Tzu-Yu Hsu Plasmonic Effects of Gold Nanoparticles on the Performance of TADF Organic Light-Emitting Diodes
Huai-Yu Lei;Tzu-Yu Hsu;Fang-Chung Chen

Amphiphilic Au nanoparticles (NPs) decorated with PEGylated graphene oxides (AuNPs@PEG-GO) were synthesized to incorporate into thermally activated delayed fluorescence organic light-emitting diodes (TADF OLEDs) for improving the device performance. Because AuNPs@PEG-GO could be well dissolved in both deionized water and organic solvents, we blended the amphiphilic Au NPs into the poly(3,4-ethylenedioxythiophene): polystyrenesulfonate (PEDOT:PSS) layer and the organic photoactive layers of TADF OLEDs simultaneously to realized dual plasmonic structures. The the device performance had been significantly improved due to the effects of localized surface plasmon resonance. The current efficiency has been enhanced by up to 68%.

Award Candidate (Paper Competition)
Manuscript ID.  0319
Paper No.  2021-FRI-P0701-P003
Chia-Hsun Chen High Efficiency Thermal Activated Delayed Fluorescence Organic Light-Emitting Diode Based on Naphthyridine Derivatives Emitter
Chia-Hsun Chen;Jing-Xiang Huang;Rasa Keruckiene;Bo-Yen Lin;Juozas Vidas Grazulevicius;Tien-Lung Chiu;Jiun-Haw Lee

In this research, a novel green thermal activated delayed fluorescence emitter based on naphthyridine (ND) derivatives, was synthesized and employed as high efficiency organic light-emitting diode (OLED). By optimizing the dopant concentration of emitter in the emitting layer (EML), maximum external quantum efficiency (EQE) reached 14.9% with CIE coordinates of (0.36, 0.57).

Award Candidate (Paper Competition)
Manuscript ID.  0038
Paper No.  2021-FRI-P0701-P004
Chen-Hsun Wu Blue-emitting non-doped OLEDs with triphenylethene-carbazole-based aggregation-induced emission molecules to realize high luminance
Chen-Hsun Wu;Cheng-Yung Ho;Wei-Han Lin;Jhao-Cheng Lu;Chih-Hao Chang;Gintare Krucaite;Raminta Beresneviciute;Saulius Grigalevicius

Tetraphenylethene (TPE) has been demonstrated to be an effective core molecule for generating excellent aggregation-induced emission. This study proposed a new series of AIE compounds based on a triphenylethene moiety decorated with different carbazole-based substitutions. The carbazole and triphenylethene moieties shared a phenyl to sustain a TPE structure. As indicated, the non-doped blue-emitting organic light-emitting diodes (OLEDs) with GK235 emitter exhibited satisfactory peak efficiencies of 3.9%, 10.2 cd/A, and 10.6 lm/W. In addition, the maximum luminance was up to 39661 cd/m2, indicating our molecular and device designs possess a high potential for fabricating non-doped blue OLEDs.

Award Candidate (Paper Competition)
Manuscript ID.  0142
Paper No.  2021-FRI-P0701-P005
Nai-Ren Chang Improvement in 80×160 Passive-Matrix μ-LED Display via Passivation Coatings
Nai-Ren Chang;Po-Hao Chen;Po-Wei Chen;Po-Liang Liu;Dong-Sing Wuu

The 80×160 passive-matrix μ-LED display was fabricated by using the laser direct writing and ALD techniques. The leakage current from sidewall defects were suppressed by an Al2O3 passivation layer from ALD system because of the non-plasma process and high surface coverage features. The illuminance of 866 cd/m2 was obtained.

Award Candidate (Paper Competition)
Manuscript ID.  0178
Paper No.  2021-FRI-P0701-P006
Jing-Yuan Su Metal-Organic Frameworks as Hole Injection Materials for Organic Light-Emitting Diodes
Hoong Lien Lai;Jing-Yuan Su;Fang-Chung Chen

In this work, a simple method for preparing thin films of a family of metal-organic framework, zeolitic imidazolate framework-8 (ZIF-8), which behave as hole injection layers in organic light-emitting diodes (OLEDs) is proposed. The ZIF-8 thin films are prepared through spin-coating of zinc nitrate hexahydrate (Zn(NO3)2·6H2O) and 2-methylimidazole (2-mIm) sequentially from their dimethylformamide (DMF) solutions. The brightness and current efficiency of the OLEDs using the ZIF-8 thin films achieve 600 cd/m2 and 3.8 cd/A, respectively. Our result indicates that ZIF-8 could be a simple solution-processable hole-injection layer for OLEDs.

Award Candidate (Paper Competition)
Manuscript ID.  0180
Paper No.  2021-FRI-P0701-P007
Chih-Wei Lo Color-converted Micro-LEDs Displays with CdSe/ZnS@SiO2 Quantum Dots and Distributed Bragg Reflector
Chih-Wei Lo;Kai-Ping Chang;Chung-Jui Wu;Po-Wei Chen;Chao-Chun Yen;Dong-Sing Wuu

CdSe/ZnS@SiO2 quantum dots (QDs) are mixed into SU-8 photoresist to realize 50 µm × 50 µm QDs color-converted μ-LED display. The distributed Bragg reflector is applied on the red/green QDs pixels to reflect 98.44% of the blue light and almost no restrictions on red/green light, suitable for full-color displays applications.

Award Candidate (Paper Competition)
Manuscript ID.  0439
Paper No.  2021-FRI-P0701-P008
Yuan-Chang Tsai Waveguide liquid crystal devices with asymmetrical light scattering properties and their applications
Yuan-Chang Tsai;Sheng-Wen Wang;Cheng-Kai Liu;Ko-Ting Cheng

The main topic reported in this study is waveguide liquid crystal (LC) devices with asymmetrical light scattering properties and their applications. The key points we discuss herein include the asymmetrical light scattering optical characteristics when an edge light source is coupled into the proposed LC devices applied with suitable electric fields, and then scattered out of the LC devices.

Award Candidate (Paper Competition)
Manuscript ID.  0325
Paper No.  2021-FRI-P0701-P009
Jing-Xiang Huang Efficient deep blue OLED achieved by a new fluorophore
Jing-Xiang Huang;Bo-Yen Lin;Chia-Hsun Chen;Jian-Haur Lee;Chin-Ti Chen;Tien-Lung Chiu;Jiun-Haw Lee

We have developed a new fluorescent compound for a deep-blue organic light emitting diode
(OLED). The emission of the fluorescent emitter in solid film was 397 nm. We applied this fluorescent
material to fabricate a non-doped OLED. As a consequence, external quantum efficiency (EQE) of this
non-doped OLED was superior as high as 4.92% and also showed a deep blue emission with peaks of
382 nm and 398 nm, respectively. The emission wavelength of device is less 400 nm and which belongs
ultra violet (UV) region, corresponding to Commission Internationale de l'Eclairage (CIE) y coordinate
by 0.0423.

Award Candidate (Paper Competition)
Manuscript ID.  0141
Paper No.  2021-FRI-P0701-P010
Dian Luo Flexible light-emitting electrochemical cells employing muscovite mica substrates
Dian Luo;Yu-Ru Li;Tzu-Hsin Hsiao;Yi-Ching Chen;Rong-Huei Yi;Chin-Wei Lu;Chih-Hao Chang;Hai-Ching Su

Efficient flexible light-emitting electrochemical cells (LECs) are fabricated on novel silicon-gallium-doped zinc oxide (SGZO) coated muscovite mica substrates. The proposed flexible LECs show excellent mechanical resistance, which can maintain more than 80% of the device performance after 10000 bending cycles with a radius of curvature of 10 mm.

Award Candidate (Paper Competition)
Manuscript ID.  0039
Paper No.  2021-FRI-P0701-P011
Jui-Ming Wong Transparent flexible electrode consisting of AgCr alloy and Mo-doped GaZnO
Jui-Ming Wong;Ming-Jung Lin;Meng-Hsuan Chiu;Chih-Hao Chang

We propose a new flexible transparent electrode that combines an ultra-thin metal alloy film with MGZO. The results showed that this highly transparent electrode showed low sheet resistance values before and after bending, demonstrating that the AgCr/MGZO composite film possesses great potential for the transparent electrode in flexible optoelectronics applications.

Award Candidate (Paper Competition)
Manuscript ID.  0185
Paper No.  2021-FRI-P0701-P012
Yu-Han Chen Research of Amorphous Indium Zinc Oxide Thin Film Transistors for Low Illumination and High Responsivity Photo Sensor
Yu-Han Chen;Yu-Chuan Chiu;Jia-Lin Huang;Po-Tsun Liu

A single layer of amorphous InZnO is chosen as the channel material for a thin film transistor (TFT)-based driver and sensing layer for a blue-light sensor, respectively, with a completely compatible process integrated into in-cell embedded photo sensor architecture. The photo sensor exhibits a high optical responsivity (1720 A/W) and good signal to noise ratio (~103) under the low blue light illumination. Afterwards, the detail studies and important issues about the sensing and material characteristics of a-IZO thin film in the TFT sensor are discussed.

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Manuscript ID.  0400
Paper No.  2021-FRI-P0701-P013
Chun-Chieh Chu Bipolar Emitter for Non-Doped White-light Organic Light-emitting Diode Application
Chun-Chieh Chu;Chia-Hsun Chen;R. Keruckiene;Bo-Yen Lin;Chi-Feng Lin;Tien-Lung Chiu;Jiun-Haw Lee;J. V. Grazulevicius

A bipolar emitter was synthesized for non-doped white organic light-emitting diode application which exhibited Commission Internationale d'Eclairage (CIE) coordinates of (0.31, 0.29).


Manuscript ID.  0338
Paper No.  2021-FRI-P0701-P014
Wei-Chung Chen High-Protection Structure of Low-Diffraction Transparent Micro LED Display
Ying-Ting Liou;Wei-Chung Chen

In this work, we show the high protection structure of low-diffraction flexible transparent Micro LED display, featuring high transmittance, high background clarity and high protection effect. There were lots of technological innovations such as a unique pixel design, fabrication on PI substrate, and high strength-stress characteristics. Finally, we demonstrate the display with the high-protection film layer, the results showed the transmittance would not be reduced, the anti-diffraction effect remains the same, and it also has the good characteristics of scratch resistance, abrasion resistance and impact resistance.

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Manuscript ID.  0624
Paper No.  2021-FRI-P0701-P015
Che-Yu Li Green Organic Light-emitting Diodes with Low Turn-on Voltages
Che-Yu Li;Chia-Hsun Chen;Shih-Chun Lin;Bo-Yen Lin;Chi-Feng Lin;Ken-Tsung Wong;Tien-Lung Chiu;Jiun-Haw Lee

Novel bipolar host material with 4CzIPN as the dopant by three different concentrations, 6%, 10%, and 13% were demonstrated. The optimums device shows the external quantum efficiency of 21.4%, the low turn-on voltages of 2.4V at 1 cd/m2, the luminance of 4185 cd/m2 at 6V ,EL spectral peak of 516 nm, and CIE coordinates of (0.277, 0.582) and low efficiency roll-off under high luminance.