Publications

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2015
Han, HC, Lo HC, Wu CY, Chen KH, Chen LC, Ou KL, Hosseinkhani* H.  2015.  Nano-textured Fluidic Biochip as Biological Filter for Selective Survival of Neuronal Cells. J. Biomed. Mater. Res. A . 103:2015.
Du, HY, Yang CS, Hsu H-C, Huang HC, Chang ST, Wang C-H, Chen J-C, Chen KH, Chen LC.  2015.  Pulsed electrochemical deposition of Pt NPs on polybenzimidazole-CNT hybrid electrode for high-temperature proton exchange membrane fuel cells. International Journal of Hydrogen Energy. 40:14398.
Chen, WC, Lien HT, Cheng TW, Su C, Chong CW, Ganguly A, Chen KH, Chen* LC.  2015.  Side Group of Poly(3-alkylthiophene)s Controlled Dispersion of Single-Walled Carbon Nanotubes for Transparent Conducting Film. ACS Appl. Mater. & Inter. . 7:4616.
Liu, YL, Yu CC, Lin KT, Yang TC, Wang EY, Chen HL, Chen LC, Chen KH.  2015.  Transparent, broadband, flexible, and bifacial-operable photodetectors containing a large-area graphene-gold oxide heterojunction. ACS Nano . 9:5093-5103.
Yen, HF, Horng YY, Hu MS, Yang WH, Tai Y, Chen KH, Chen LC.  2015.  Vertically aligned epitaxial graphene nanowalls with dominated nitrogen-doping for superior supercapacitors. Carbon . 82:124-134.
Shown, I, Ganguly A, Chen L-C, Chen K-H.  2015.  Conducting polymer-based flexible supercapacitor, 2015. Energy Science & EngineeringEnergy Science & Engineering. 3(1):2-26.: John Wiley & Sons, Ltd AbstractWebsite

Abstract Flexible supercapacitors, a state-of-the-art material, have emerged with the potential to enable major advances in for cutting-edge electronic applications. Flexible supercapacitors are governed by the fundamentals standard for the conventional capacitors but provide high flexibility, high charge storage and low resistance of electro active materials to achieve high capacitance performance. Conducting polymers (CPs) are among the most potential pseudocapacitor materials for the foundation of flexible supercapacitors, motivating the existing energy storage devices toward the future advanced flexible electronic applications due to their high redox active-specific capacitance and inherent elastic polymeric nature. This review focuses on different types of CPs-based supercapacitor, the relevant fabrication methods and designing concepts. It describes recent developments and remaining challenges in this field, and its impact on the future direction of flexible supercapacitor materials and relevant device fabrications.

2016
Lee, CP, Chen* WF, Billo T, Lin YG, Fu FY, Samireddi S, Lee CH, Hwang JS, Chen* LC, Chen* KH.  2016.  Beaded-stream-like CoSe2 nanoneedles array for efficient hydrogen evolution electrocatalysis. J. Mater. Chem. A . 4 :4553-4561.
Yesi, Y, Shown I, Ganguly A, Ngo TT, Chen LC, Chen KH.  2016.  Directly-grown hierarchical carbon nanotube@polypyrrole core-shell hybrid for high-performance flexible supercapacitors. ChemSusChem . 9:370-378.
Wei-ChaoChen, Cheng-YingChen, Tunuguntla V, HungLu S, ChaochinSu, Lee C-H, Chen K-H, Chen L-C.  2016.  Enhanced solar cell performance of Cu2ZnSn(S,Se)4 thin films through structural control by using multi-metallic stacked nanolayers and fast ramping process for sulfo-selenization. Nano Energy. 30:762-770.
Wong, DP, Huang CY, Chien WL, Chang CE, Ganguly A, Lyu LM, Hwang JS, Chen LC, Chen KH.  2016.  Enhanced thermoelectric performance in percolated bismuth sulfide composite. RSC Advances . 6:98952.
Tunuguntla, V, Chen WC, Newman TD, Hsieh MC, Lu SH, Su C, Chen LC, Chen KH.  2016.  Enhancement of charge collection at shorter wave lengths from alternative CdS deposition conditions for high efficiency CZTSSe solar cells. Solar Energy Materials & Solar Cells . 149:49-54.
Chen, WC, Tunuguntla V, Li HW, Chen CY, Li SS, Hwang JS, Lee CH, Chen LC, Chen KH.  2016.  Fabrication of Cu2ZnSnSe4 solar cells through multi-step selenization of layered metallic precursor film. Thin Solid Films .
Lin, YR, Chou TC, Liu LK, Chen LC, Chen KH.  2016.  A facile and green synthesis of copper zinc tin sulfide materials for thin film photovoltaics. Thin Solid Films.
Chen, IN, Chong CW, Lyu LM, Wong DP, Chien WL, Anbu A, Chen YF, Chen LC, Chen KH.  2016.  Improving the thermoelectric performance of metastable rock-salt GeTe-rich Ge-Sb-Te thin films through tuning of grain orientation and vacancies. Physica Status Solidi A . :1-8.
Wang, B-Y, Wang HT, Chen L-Y, Hsueh HC, Chiou JW, Wang W-H, Wang PH, Chen K-H, Chen Y-C, Chen L-C, Chen C-H, Pong WF, Wang J, Guo J-H.  2016.  Nonlinear opening of the band gap of BN-co-doped graphene. Carbon.
Myers, J, Mou* S, Chen KH, Zhuang Y.  2016.  Scanning microwave microscope imaging of micro-patterned monolayer graphene grown by chemical vapor deposition. Applied Physics Letters . 108:053101.
Lee, C-P, Chen W-F, Billo T, Lin Y-G, Fu F-Y, Samireddi S, Lee C-H, Hwang J-S, Chen K-H, Chen L-C.  2016.  Beaded stream-like CoSe2 nanoneedle array for efficient hydrogen evolution electrocatalysis, 2016. Journal of Materials Chemistry A. 4(12):4553-4561.: The Royal Society of Chemistry AbstractWebsite

The development of earth-abundant and efficient electrocatalysts for the hydrogen evolution reaction (HER) is one of the keys to success for future green energy systems using hydrogen fuel. Nanostructuring of electrocatalysts is a promising way to enhance their electrocatalytic performance in the HER. In this study, pure pyrite-type beaded stream-like cobalt diselenide (CoSe2) nanoneedles are directly formed on flexible titanium foils through treating a cobalt oxide (Co3O4) nanoneedle array template with selenium vapor. The beaded stream-like CoSe2 nanoneedle electrode can drive the HER at a current density of 20 mA cm−2 with a small overpotential of 125 mV. Moreover, the beaded stream-like CoSe2 nanoneedle electrode remains stable in an acidic electrolyte for 3000 cycles and continuously splits water over a period of 18 hours. The enhanced electrochemical activity is facilitated by the unique three-dimensional hierarchical structure, the highly accessible surface active sites, the improved charge transfer kinetics and the highly attractive force between water and the surface of the nanoneedles that exceeds the surface tension of water.

Tran Nguyen, NH, Nguyen TH, Liu Y-ren, Aminzare M, Pham ATT, Cho S, Wong DP, Chen K-H, Seetawan T, Pham NK, Ta HKT, Tran VC, Phan TB.  2016.  Thermoelectric Properties of Indium and Gallium Dually Doped ZnO Thin Films, 2016. ACS Applied Materials & InterfacesACS Applied Materials & Interfaces. 8(49):33916-33923.: American Chemical Society AbstractWebsite
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Lin, Y-K, Chen R-S, Chou T-chin, Lee Y-H, Chen Y-F, Chen K-H, Chen L-C.  2016.  Thickness-Dependent Binding Energy Shift in Few-Layer MoS2 Grown by Chemical Vapor Deposition, 2016. ACS Applied Materials & InterfacesACS Applied Materials & Interfaces. 8(34):22637-22646.: American Chemical Society AbstractWebsite
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2017
Wei-ChaoChen, Tunuguntla V, Min-HsuehChiu, Lian-JiunLi, Shown I, Lee C-H, Hwang J-S, Chen L-C, Chen K-H.  2017.  Co-solvent effect on microwave-assisted Cu2ZnSnS4 nanoparticles synthesis for thin film solar cell. Solar Energy Materials and Solar Cells. 161:416-423.
Ciao-WeiYang, Chin-ChangChen, Chen K-H, SoofinCheng.  2017.  Effect of pore-directing agents in SBA-15 nanoparticles on the performance of Nafion®/SBA-15n composite membranes for DMFC. Journal of Membrane Science. 526:106-117.
Ramakrishnan, A, Raman S, Chen L-C, Chen K-H.  2017.  Enhancement in Thermoelectric Properties of TiS2 by Sn Addition. Journal of Electronic Materials. :1–8.
Chiu, J-M, Chen E-M, Lee C-P, Shown I, Tunuguntla V, Chou J-S, Chen L-C, Chen K-H, Tai Y.  2017.  Geogrid-Inspired Nanostructure to Reinforce a CuxZnySnzS Nanowall Electrode for High-Stability Electrochemical Energy Conversion Devices. Advanced Energy Materials. 7(12):1602210.
Pathak, A, Chiou GR, Gade NR, Usman M, Mendiratta S, Luo T-T, Tseng TW, Chen J-W, Chen F-R, Chen K-H, Chen L-C, Lu K-L.  2017.  High-κ Samarium-Based Metal–Organic Framework for Gate Dielectric Applications. ACS Appl. Mater. Interfaces. 9(26):21872–21878.
Samireddi, S, Shown I, Shen T-H, Huang H-C, Wong K-T, Chen L-C, Chen K-H.  2017.  Hybrid bimetallic-N4 electrocatalyst derived from a pyrolyzed ferrocene–Co-corrole complex for oxygen reduction reaction. Journal of Materials Chemistry A. 5:9279-9286.