Yu-Chen Chou

National Taichung University of Education

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Pin-Hung Chen

National United University

Chi‐Feng Lin

National United University

Hsieh‐Cheng Han

Research Center for Applied Science, Academia Sinica

Jhang-Fu Haung

National United University

Kuo-Yuan Chiu

National Chi Nan University

M. H. Lee

National Taiwan University

S.-S. Gu

National Taiwan Normal University

C. W. Liu

National Taiwan University

Jiahao Lin

Zhejiang University

Yuhlong Oliver Su

National Chi Nan University

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National Taiwan Normal University

National Taiwan University

National Tsing Hua University

National Taichung University of Education

National Yang Ming Chiao Tung University

National Cheng Kung University

National Applied Research Laboratories

National United University

National Central University

Industrial Technology Research Institute

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Synthesis of bismuth oxybromochloroiodide/graphitic carbon nitride quaternary composites (BiOxCly/BiOmBrn/BiOpIq/g-C3N4) enhances visible-light-driven photocatalytic activity

Catalysis Communications (2022)

Yu‐Yun Lin Jiun-Ting Hung Yu-Chen Chou Shijie Shen Wu-Tsan Wu

BiOxCly/BiOmBrn/BiOpIq/g-C3N4 was prepared by using the hydrothermal synthesis. The composition and morphologies of the composites were controlled by adjusting the reaction pH value, temperature, and molar ratio. The optimized BiOxCly/BiOmBrn/BiOpIq/g-C3N4 photocatalyst increased the rate of photocatalytic conversion from CO2 to CH4 to 0.036 μmol g−1 h−1 and these samples were subjected to photocatalytic degradation with CV. The enhanced photocatalytic activity can be attributed to the effective separation of photogenerated carriers driven by the photoinduced potential difference generated at these heterostructure interfaces, the transfer of photogenerated electrons through the g-C3N4 skeleton, and the favorable alignment of the straddling band structure from BiOxCly/BiOmBrn/BiOpIq/g-C3N4.

Graphitic carbon nitride

Bismuth

Degradation

Visible spectrum

Molar ratio

10.1016/j.catcom.2022.106418

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Citations (46)

Counter Electrodes Prepared by Few Layer and Multilayer Graphene Mixed with Molybdenum Disulfide for Platinum-Free Dye-Sensitized Solar Cells

The Japan Society of Applied Physics (2016)

Yu-Chen Chou Huai‐Yi Chen

Molybdenum disulfide

Auxiliary electrode

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Dye sensitized solar cells with carbon black as counter electrodes

Japanese Journal of Applied Physics (2016)

Chi‐Feng Lin Yu-Chen Chou Jhang-Fu Haung Pin-Hung Chen Hsieh‐Cheng Han

Abstract In this experiment, we use carbon black as counter electrodes to replace the conventional platinum electrodes in dye sensitized solar cell (DSSC). The electrical properties and device efficiency with carbon black counter electrodes with various concentrations, and under the annealing temperature from 100 to 500 °C are discussed. After the proper annealing process, the conductivity and redoxing ability of the carbon black is improved, resulted in the enhancement of the electrical characteristics, especially fill factor, of the device. The highest device efficiency was 7.28% with the J SC of 14.70 mA/cm 2 , V OC of 0.75 V, and fill factor of 0.67 under 1-sun AM 1.5G solar illumination.

Auxiliary electrode

Carbon fibers

10.7567/jjap.55.03ce01

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Citations (3)

Cobalt and Carbon Complex as Counter Electrodes in Dye-Sensitized Solar Cells

Photonics (2021)

Chi‐Feng Lin Ting-Hsuan Hsieh Yu-Chen Chou Pin-Hung Chen Ci-Wun Chen

We developed cobalt and carbon complex materials as counter electrodes (CEs) for dye-sensitized solar cells (DSSCs) to replace conventional platinum (Pt) CEs. Co12 and Co15, both of which are basic cobalt derivatives, showed good redox potential with a suitable open-circuit voltage (VOC); however, their poor electrical conductivity engendered a low short-circuit current (JSC) and fill factor (FF). Mixing them with carbon black (CB) improved the electrical conductivity of the CE; in particular, JSC and FF were considerably improved. Further improvement was achieved by combining cobalt derivatives and CB through thermal sintering to produce a novel CoCB material as a CE. CoCB had good electrical conductivity and electrocatalytic capability, and this further enhanced both JSC and VOC. The optimized device exhibited a power conversion efficiency (PCE) of 7.44%, which was higher than the value of 7.16% for a device with a conventional Pt CE. The conductivity of CoCB could be further increased by mixing it with PEDOT:PSS, a conducting polymer. The device’s JSC increased to 18.65 mA/cm2, which was considerably higher than the value of 14.24 mA/cm2 for the device with Pt CEs. The results demonstrate the potential of the cobalt and carbon complex as a CE for DSSCs.

Auxiliary electrode

Open-circuit voltage

Carbon fibers

10.3390/photonics8050166

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Citations (6)

Function Block Based Shop Floor Integration

Qi Hao Lihui Wang Weiming Shen Yu-Chen Chou

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Dye sensitized solar cells with carbon and cobalt derivatives as counter electrodes

Chi‐Feng Lin Yu-Chen Chou Pin-Hung Chen Ting-Hsuan Hsieh Hsieh‐Cheng Han

In this report, we use series of cobalt derivatives, conducting polymer and carbon materials as the counter electrodes to replace the conventional platinum in dye sensitized solar cells. The basic cobalt derivatives, Co12 and Co15, showed the capability as the counter electrode with proper short-circuit current (J _SC ) and open-circuit voltage (V _OC ), but the poor conductivity and redox ability result in bad fill factor of the device. After mixing Co12 and Co15 with carbon black, the device performances were enhanced obviously. The further improve was done by combine Co derivative and carbon black to form the new type material CoCB as the counter electrode. The great conductivity and redox ability enhanced both J _SC and V _OC , the optimized device show the power conversion efficiency of 7.13%, similar to the control device with conventional Pt electrode. The result showed the potential of cobalt derivatives as the counter electrode of DSSCs.

Auxiliary electrode

Carbon fibers

10.1109/piers.2016.7734544

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Ferroelectric HfZrO_x FETs on SOI Substrate With Reverse-DIBL (Drain-Induced Barrier Lowering) and NDR (Negative Differential Resistance)

IEEE Journal of the Electron Devices Society (2018)

Kuan‐Ting Chen S.-S. Gu Zhengying Wang C.-Y. Liao Yu-Chen Chou

Ferroelectric-Hf _1-x Zr _x O ₂ FETs on silicon on insulator (SOI) are modeled and demonstrated with improvement on subthreshold swing (SS) and hysteresis (V _T -shift), which is based on the capacitance matching concept. The minimum reverse SS = 45 mV/dec and 52 mV/dec are obtained experimentally for SOI and bulk-Si, respectively. The steep SS range (<;60 mV/dec) is extended from ~2.5 (bulk-Si) decades to ~3.5 decades SOI. Reverse-drain-induced barrier lowering and negative differential resistance are confirmed at subthreshold region and weak inversion region, respectively.

10.1109/jeds.2018.2863283

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Citations (15)

Erratum: “Dye sensitized solar cells with carbon black as counter electrodes”

Japanese Journal of Applied Physics (2017)

Chi‐Feng Lin Yu-Chen Chou Jhang-Fu Haung Pin-Hung Chen Hsieh‐Cheng Han

Auxiliary electrode

Carbon fibers

10.7567/jjap.56.129210

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Citations (2)

Dual-functional gold–iron oxide core–satellite hybrid nanoparticles for sensitivity enhancement in biosensors via nanoplasmonic and preconcentration effects

The Analyst (2021)

Yi‐Chen Chen Yu-Chen Chou Jui‐Han Chang Liting Chen Chun‐Jen Huang

A common strategy to improve the sensitivity of a biosensor for the detection of a low abundance analyte is to preconcentrate the analyte molecules before detection. A dual-functional gold-iron oxide core-satellite hybrid nanoparticle structure is proposed in this work to overcome the drawbacks of traditional sample pretreatment methods and the methods using non-magnetic nanomaterials for sample pretreatment. The new dual-functional hybrid nanoparticle structure can simultaneously serve as a signal reporter of a biorecognition event and a preconcentrator of a target at an extremely low concentration in a nanoplasmonic biosensor. By utilizing a fiber optic nanogold-linked sorbent assay in the fiber optic particle plasmon resonance (FOPPR) biosensor and an arbitrary DNA sequence as a target, we have demonstrated that the use of the new hybrid nanoparticle structure with magnetic preconcentration improves the limit of detection (LOD) for the DNA by 18 times as compared to the same method without magnetic preconcentration, so that the LOD for detecting the DNA can be as low as 2.6 fM. The new hybrid nanoparticle structure is easy to prepare and its use in the high-sensitivity and low-cost FOPPR biosensor provides vast opportunities in point-of-care applications.

Nanomaterials

Iron oxide nanoparticles

10.1039/d1an01334c

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Citations (10)

Controlled hydrothermal synthesis of BiOxCly/BiOmBrn/g-C3N4 composites exhibiting visible-light photocatalytic activity

Journal of Environmental Management (2021)

Yu-Chen Chou Yu‐Yun Lin Chung‐Shin Lu Fuyu Liu Jiahao Lin

Photodegradation

Graphitic carbon nitride

Visible spectrum

Scavenger

Bismuth

Hydrothermal Synthesis

10.1016/j.jenvman.2021.113256

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Citations (56)