Find Research Outputs

2019

A high-performance Pd nanoparticle (NP)/WO₃ thin-film-based hydrogen sensor

Lee, C. & Liu, W-C., 2019 Jul 1, In : IEEE Electron Device Letters. 40, 7, p. 1194-1197 4 p., 8709960.

Research output: Contribution to journal › Article

Hydrogen

Nanoparticles

Thin films

Vacuum evaporation

Thermal evaporation

2 Citations (Scopus)

Ammonia Sensing Characteristics of a Tungsten Trioxide Thin-Film-Based Sensor

Chou, T. C., Chang, C. H., Lee, C. & Liu, W. C., 2019 Jan, In : IEEE Transactions on Electron Devices. 66, 1, p. 696-701 6 p., 8556505.

Research output: Contribution to journal › Article

Ammonia

Tungsten

Thin films

Sensors

Air

Hydrogen sensing characteristics of a metal-oxide-semiconductor diode with bimetallic catalysts and a gao_x dielectric

Chen, H. Y. & Liu, W-C., 2019 Jul 1, In : IEEE Transactions on Electron Devices. 66, 7, p. 3144-3150 7 p., 8727417.

Research output: Contribution to journal › Article

Semiconductor diodes

Hydrogen

Metals

Catalysts

Adsorption

Inverter logic of AlGaAs/InGaAs enhancement/depletion-mode pseudomorphic high electron mobility transistors with virtual channel layers

Tsai, J. H., Lin, P. S., Lour, W. S. & Liu, W. C., 2019 Jan 1, In : ECS Journal of Solid State Science and Technology. 8, 10, p. Q211-Q216

Research output: Contribution to journal › Article

Open Access

Drain current

Transconductance

High electron mobility transistors

Field effect transistors

Transistors

1 Citation (Scopus)

Performance Improvement of GaN-Based Light-Emitting Diodes with a Microhole Array, 45° Sidewalls, and a SiO₂ Nanoparticle/Microsphere Passivation Layer

Chang, C. H., Lee, Y. L., Wang, Z. F., Liu, R. C., Tsai, J. H. & Liu, W. C., 2019 Jan, In : IEEE Transactions on Electron Devices. 66, 1, p. 505-511 7 p., 8573125.

Research output: Contribution to journal › Article

Microspheres

Passivation

Light emitting diodes

Nanoparticles

Leakage currents

2018

9 Citations (Scopus)

Ammonia sensing characteristic of a Pt nanoparticle/aluminum-doped zinc oxide sensor

Chen, H. I., Chi, C. Y., Chen, W. C., Liu, I. P., Chang, C. H., Chou, T. C. & Liu, W. C., 2018 Aug 15, In : Sensors and Actuators, B: Chemical. 267, p. 145-154 10 p.

Research output: Contribution to journal › Article

Zinc Oxide

Zinc oxide

Aluminum

Ammonia

zinc oxides

28 Citations (Scopus)

Characteristics of a Pt/NiO thin film-based ammonia gas sensor

Chen, H. I., Hsiao, C. Y., Chen, W. C., Chang, C. H., Chou, T. C., Liu, I. P., Lin, K. W. & Liu, W. C., 2018 Mar, In : Sensors and Actuators, B: Chemical. 256, p. 962-967 6 p.

Research output: Contribution to journal › Article

Chemical sensors

Ammonia

ammonia

Thin films

sensors

7 Citations (Scopus)

Enhanced light extraction of gan-based light-emitting diodes with a hybrid structure incorporating microhole arrays and textured sidewalls

Lee, Y. L. & Liu, W-C., 2018 Aug 1, In : IEEE Transactions on Electron Devices. 65, 8, p. 3305-3310 6 p., 8403900.

Research output: Contribution to journal › Article

Light emitting diodes

Photons

Plasma etching

Light emission

Inductively coupled plasma

2 Citations (Scopus)

Enhancement of Hydrogen Sensing Performance of a Pd Nanoparticle/Pd Film/GaO_x/GaN-Based Metal-Oxide- Semiconductor Diode

Ke, B. Y. & Liu, W-C., 2018 Oct 1, In : IEEE Transactions on Electron Devices. 65, 10, p. 4577-4584 8 p., 8450052.

Research output: Contribution to journal › Article

Semiconductor diodes

Hydrogen

Metals

Nanoparticles

Air

11 Citations (Scopus)

Formaldehyde sensing characteristics of an aluminum-doped zinc oxide (AZO) thin-film-based sensor

Chi, C. Y., Chen, H. I., Chen, W. C., Chang, C. H. & Liu, W. C., 2018 Feb, In : Sensors and Actuators, B: Chemical. 255, p. 3017-3024 8 p.

Research output: Contribution to journal › Article

Zinc Oxide

Zinc oxide

formaldehyde

Aluminum

Formaldehyde

3 Citations (Scopus)

Formaldehyde sensing characteristics of a nio-based sensor decorated with Pd nanoparticles and a Pd Thin film

Chen, H. I., Hsiao, C. Y., Chen, W. C., Chang, C. H., Liu, I. P., Chou, T. C. & Liu, W. C., 2018 May, In : IEEE Transactions on Electron Devices. 65, 5, p. 1956-1961 6 p.

Research output: Contribution to journal › Article

Formaldehyde

Nanoparticles

Thin films

Chemical stability

Sensors

3 Citations (Scopus)

Hydrogen sensing performance of a Pd/HfO₂/GaN metal-oxide-semiconductor (MOS) Schottky diode

Chen, H. I., Chang, C. H., Lu, H. H., Liu, I. P., Chen, W. C., Ke, B. Y. & Liu, W. C., 2018 Jun 1, In : Sensors and Actuators, B: Chemical. 262, p. 852-859 8 p.

Research output: Contribution to journal › Article

semiconductor diodes

Schottky diodes

metal oxide semiconductors

Hydrogen

Diodes

6 Citations (Scopus)

Hydrogen sensing performance of a Pd/HfO₂/GaO_x/GaN based metal-oxide-semiconductor type Schottky diode

Chang, C. H., Lin, K. W., Lu, H. H., Liu, R. C. & Liu, W. C., 2018 Oct 18, In : International Journal of Hydrogen Energy. 43, 42, p. 19816-19824 9 p.

Research output: Contribution to journal › Article

Schottky diodes

metal oxide semiconductors

Diodes

Hydrogen

hydrogen

4 Citations (Scopus)

Implementation of light extraction improvements of GaN-based light-emitting diodes with specific textured sidewalls

Chen, C. Y., Chen, W. C., Chang, C. H., Lee, Y. L. & Liu, W. C., 2018 May, In : Optics and Laser Technology. 101, p. 172-176 5 p.

Research output: Contribution to journal › Article

Light emitting diodes

light emitting diodes

Inductively coupled plasma

Quantum efficiency

Electric properties

2017

An improved GaN-based light-emitting diode with a SiO₂ current blocking layer embedded in stair-like AZO transparent structure

Liou, S. H., Tsai, J. H., Liu, W-C., Lin, P. S. & Chen, Y. C., 2017 Jan 1, In : ECS Journal of Solid State Science and Technology. 6, 10, p. R149-R153

Research output: Contribution to journal › Article

Zinc Oxide

Stairs

Zinc oxide

Aluminum

Light emitting diodes

5 Citations (Scopus)

Characteristics of GaN-Based LEDs with Hybrid Microhole Arrays and SiO₂ Microspheres/Nanoparticles Structures

Liou, J. K., Chan, Y. C., Chen, W. C., Chang, C. H., Chen, C. Y., Tsai, J. H. & Liu, W. C., 2017 Jul, In : IEEE Transactions on Electron Devices. 64, 7, p. 2854-2858 5 p., 7932114.

Research output: Contribution to journal › Article

Antireflection coatings

Microspheres

Light emitting diodes

Nanoparticles

Passivation

14 Citations (Scopus)

Hydrogen sensing characteristics of a Pd/AlGaO_x/AlGaN-based Schottky diode

Chen, H. I., Chuang, K. C., Chang, C. H., Chen, W. C., Liu, I. P. & Liu, W. C., 2017 Jan 1, In : Sensors and Actuators, B: Chemical. 246, p. 408-414 7 p.

Research output: Contribution to journal › Article

Schottky diodes

Hydrogen

Diodes

hydrogen

Gases

10 Citations (Scopus)

Hydrogen sensing performance of a Pd nanoparticle/Pd film/GaN-based diode

Chen, H. I., Cheng, Y. C., Chang, C. H., Chen, W. C., Liu, I. P., Lin, K. W. & Liu, W. C., 2017 Jan 1, In : Sensors and Actuators, B: Chemical. 247, p. 514-519 6 p.

Research output: Contribution to journal › Article

Hydrogen

Diodes

diodes

Nanoparticles

nanoparticles

1 Citation (Scopus)

Influence of AZO stair-like transparent layers on GaN-based light-emitting diodes

Liou, S. H., Tsai, J. H., Liu, W-C., Lin, P. S. & Chen, Y. C., 2017 Oct 1, In : Superlattices and Microstructures. 110, p. 171-179 9 p.

Research output: Contribution to journal › Article

Zinc Oxide

Stairs

Zinc oxide

Aluminum

zinc oxides

7 Citations (Scopus)

Light Extraction Enhancement of GaN-Based Light-Emitting Diodes with Textured Sidewalls and ICP-Transferred Nanohemispherical Backside Reflector

Chen, C. Y. & Liu, W-C., 2017 Sep 1, In : IEEE Transactions on Electron Devices. 64, 9, p. 3672-3677 6 p., 7974814.

Research output: Contribution to journal › Article

Inductively coupled plasma

Light emitting diodes

Photons

Plasma etching

Light emission

Performance Enhancement of GaN-Based Light-Emitting Diodes by Using Transparent Ag Metal Line Patterns

Hsu, C. S., Chen, S. Y., Liou, J. K., Chen, W. C., Chang, C. H., Chen, C. Y., Cheng, S. Y., Guo, D. F. & Liu, W. C., 2017 Jun, In : IEEE Transactions on Electron Devices. 64, 6, p. 2542-2548 7 p., 7911252.

Research output: Contribution to journal › Article

Light emitting diodes

Metals

Electric potential

Quantum efficiency

Thermal effects

4 Citations (Scopus)

Study of a GaN-Based LED with an Al/AZO Composite Transparent Conductive Layer

Hsu, C. H., Chen, S. Y., Chen, W. C., Chang, C. H., Chen, C. Y., Tsai, J. H. & Liu, W. C., 2017 Sep, In : IEEE Transactions on Electron Devices. 64, 9, p. 3678-3682 5 p., 7982960.

Research output: Contribution to journal › Article

Zinc Oxide

Zinc oxide

Aluminum

Light emitting diodes

Composite materials

7 Citations (Scopus)

Study of GaN-based LEDs with hybrid SiO₂ microsphere/nanosphere antireflection coating as a passivation layer by a rapid convection deposition

Hsu, C. H., Chan, Y. C., Chen, W. C., Chang, C. H., Liou, J. K., Cheng, S. Y., Guo, D. F. & Liu, W. C., 2017 Mar, In : IEEE Transactions on Electron Devices. 64, 3, p. 1134-1139 6 p., 7845605.

Research output: Contribution to journal › Article

Antireflection coatings

Nanospheres

Microspheres

Passivation

Light emitting diodes

2016

1 Citation (Scopus)

A Pt/AlGaN/GaN heterostructure field-effect transistor (HFET) prepared by an electrophoretic deposition (EPD)-gate approach

Hung, C. W., Chang, C. H., Chen, W. C., Chen, C. C., Chen, H. I., Tsai, Y. T., Tsai, J. H. & Liu, W. C., 2016 Oct 1, In : Solid-State Electronics. 124, p. 5-9 5 p.

Research output: Contribution to journal › Article

High electron mobility transistors

field effect transistors

Transconductance

room temperature

transconductance

Hydrogen sensing performance of an electrophoretic deposition (EPD) based Pd/GaN Schottky diode

Chen, W. C., Chen, H. I., Chou, P. C., Chang, C. H., Chiou, Y. J. & Liu, W. C., 2016 Mar 21, 2015 9th International Conference on Sensing Technology, ICST 2015. IEEE Computer Society, p. 355-358 4 p. 7438422. (Proceedings of the International Conference on Sensing Technology, ICST; vol. 2016-March).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Diodes

Hydrogen

Air

Gases

Recovery

4 Citations (Scopus)

Preparation and characterization of nickel oxide-based EGFET pH sensors

Lin, F., Chang, H. Y., Hsiao, S. H., Chen, H-I. & Liu, W-C., 2016 Mar 21, 2015 9th International Conference on Sensing Technology, ICST 2015. IEEE Computer Society, p. 402-405 4 p. 7438430. (Proceedings of the International Conference on Sensing Technology, ICST; vol. 2016-March).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

pH sensors

Gates (transistor)

Nickel oxide

Oxide films

Calcination

2015

An enhancement-mode pseudomorphic high electron mobility transistor prepared by an Electroless Plating (EP) and a gate-sinking approaches

Chen, C. C., Chen, H-I., Liu, I-P., Chou, P. C., Liou, J. K., Tsai, J. H. & Liu, W-C., 2015 Jan 1, In : Solid-State Electronics. 105, p. 45-50 6 p.

Research output: Contribution to journal › Article

sinking

Electroless plating

High electron mobility transistors

high electron mobility transistors

plating

1 Citation (Scopus)

Characteristics enhancement of a GaAs based heterostructure field-effect transistor with an electrophoretic deposition (EPD) surface treated gate structure

Chen, C. C., Chen, H. I., Liu, I. P., Chou, P. C., Liou, J. K., Tsai, Y. T. & Liu, W. C., 2015 Jun 30, In : Applied Surface Science. 341, p. 120-126 7 p.

Research output: Contribution to journal › Article

High electron mobility transistors

field effect transistors

augmentation

aluminum gallium arsenides

ambience

55 Citations (Scopus)

Characteristics of ZnO nanorods-based ammonia gas sensors with a cross-linked configuration

Chen, T. Y., Chen, H-I., Hsu, C. S., Huang, C. C., Wu, J. S., Chou, P. C. & Liu, W-C., 2015 Jul 17, In : Sensors and Actuators, B: Chemical. 221, p. 491-498 8 p.

Research output: Contribution to journal › Article

Chemical sensors

Nanorods

Ammonia

nanorods

ammonia

7 Citations (Scopus)

Enhanced light extraction of a high-power GaN-based light-emitting diode with a nanohemispherical hybrid backside reflector

Liou, J. K., Chen, W. C., Chang, C. H., Chang, Y. C., Tsai, J. H. & Liu, W. C., 2015 Oct 1, In : IEEE Transactions on Electron Devices. 62, 10, p. 3296-3301 6 p., 7194779.

Research output: Contribution to journal › Article

Aluminum Oxide

Inductively coupled plasma

Sapphire

Light emitting diodes

Nanospheres

22 Citations (Scopus)

Enhancement of hydrogen sensing performance of a GaN-based Schottky diode with a hydrogen peroxide surface treatment

Chen, C. C., Chen, H. I., Liu, I. P., Liu, H. Y., Chou, P. C., Liou, J. K. & Liu, W. C., 2015 May, In : Sensors and Actuators, B: Chemical. 211, p. 303-309 7 p.

Research output: Contribution to journal › Article

Schottky diodes

surface treatment

hydrogen peroxide

Hydrogen peroxide

Hydrogen Peroxide

2 Citations (Scopus)

Hydrogen sensing characteristics of a Pt/AlGaN/GaN heterostructure field-effect transistor (HFET) prepared by sensitization, activation, and electroless plating (EP) approaches

Chen, C. C., Chen, H-I., Liu, I-P., Chou, P. C., Liou, J. K., Huang, C. C. & Liu, W-C., 2015 Jan 1, In : Sensors and Actuators, B: Chemical. 212, p. 127-136 10 p.

Research output: Contribution to journal › Article

Electroless plating

High electron mobility transistors

plating

Hydrogen

field effect transistors

26 Citations (Scopus)

Hydrogen sensing performance of a nickel oxide (NiO) thin film-based device

Chou, P. C., Chen, H-I., Liu, I-P., Chen, C. C., Liou, J. K., Hsu, K. S. & Liu, W-C., 2015 Jan 5, In : International Journal of Hydrogen Energy. 40, 1, p. 729-734 6 p.

Research output: Contribution to journal › Article

Nickel oxide

nickel oxides

Oxide films

Thin films

Hydrogen

7 Citations (Scopus)

Nitrogen Oxide (NO₂) Gas Sensing Performance of ZnO Nanoparticles (NPs)/Sapphire-Based Sensors

Chou, P. C., Chen, H-I., Liu, I-P., Chen, C. C., Liou, J. K., Lai, C. J. & Liu, W-C., 2015 Jul 1, In : IEEE Sensors Journal. 15, 7, p. 3759-3763 5 p., 7050338.

Research output: Contribution to journal › Article

nitrogen oxides

Nitrogen oxides

Sapphire

sapphire

Nanoparticles

17 Citations (Scopus)

On a GaN-based ion sensitive field-effect transistor (ISFET) with a hydrogen peroxide surface treatment

Chen, C. C., Chen, H. I., Liu, H. Y., Chou, P. C., Liou, J. K. & Liu, W. C., 2015 Mar 31, In : Sensors and Actuators, B: Chemical. 209, p. 658-663 6 p.

Research output: Contribution to journal › Article

Ion sensitive field effect transistors

surface treatment

hydrogen peroxide

Hydrogen peroxide

Hydrogen Peroxide

6 Citations (Scopus)

On a Schottky diode-type hydrogen sensor with pyramid-like Pd nanostructures

Chou, P. C., Chen, H-I., Liu, I-P., Chen, W. C., Chen, C. C., Liou, J. K., Lai, C. J. & Liu, W-C., 2015 Aug 3, In : International Journal of Hydrogen Energy. 40, 29, p. 9006-9012 7 p., 15920.

Research output: Contribution to journal › Article

Schottky diodes

pyramids

Nanostructures

Diodes

Hydrogen

23 Citations (Scopus)

On the Ammonia Gas Sensing Performance of a RF Sputtered NiO Thin-Film Sensor

Chou, P. C., Chen, H-I., Liu, I-P., Chen, C. C., Liou, J. K., Hsu, K. S. & Liu, W-C., 2015 Jul 1, In : IEEE Sensors Journal. 15, 7, p. 3711-3715 5 p., 7053906.

Research output: Contribution to journal › Article

ammonia

Ammonia

Thin films

sensors

Sensors