Publications

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2017
Lee, S-W, Chen J-C, Wu J-A, Chen K-H.  2017.  Synthesis and Properties of Poly(ether sulfone)s with Clustered Sulfonic Groups for PEMFC Applications under Various Relative Humidity. ACS Appl. Mater. Interfaces. 9(11):9805–9814.
2016
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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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.
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.
2015
Lin, YR, Tunuguntla V, Wei SY, Chen WC, Wong D, Lai CH, Liu LK, Chen LC, Chen KH.  2015.  Bifacial sodium-incorporated treatments: tailoring deep traps and enhancing carrier transport properties in Cu2ZnSnS4 solar cells. Nano Energy . 16:438.
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.
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.
2014
Lien, HT, Wong DP, Tsao NH, Huang CI, Su C, Chen KH, Chen LC.  2014.  Effect of copper oxide oxidation state on the polymer-based solar cell buffer layers. ACS Appl. Mater. & Inter. .
Lin, YG, Chen YC, Miller JT, Chen LC, Chen KH, Hsu YK.  2014.  Hierarchically porous Ca-containing MnO2 nanorod bundles with superior photoelectrochemical activity. ChemCatChem . 6:1684.
Du, HY, Wang CH, Yang CS, Hsu HC, Chang ST, Huang HC, Lai SW, Chen JC, Yu LT, Chen LC, Chen KH.  2014.  A high performance polybenzimidazole-CNT hybrid electrode for high-temperature proton exchange membrane fuel cells. J. of Mater. Chem. . 2:7015-7019.
Chen, YC, Lin YG, Hsu YK, Yen SC, Chen KH, Chen LC.  2014.  Novel iron oxyhydroxide lepidocrocite nanosheet as ultrahigh power density anode material for asymmetric supercapacitors. Small . 10:3803–3810.
Talwa, DN, Liao YC, Chen LC, Chen KH, Feng ZC.  2014.  Optical properties of plasma-assisted molecular beam epitaxy grown InN/Sapphire. Opt. Mater. . 37:1.
Liang, CK, Chang ST, Verkhoturov SV, Chen LC, Chen KH, Schweikert* EA.  2014.  SIMS methodology for probing the fate and dispersion of catalytically active molecules. Intl. J. Mass Spectrometry . 370:107-113.
2013
Chen, RS, Wang WC, Chan CH, Lu ML, Chen YF, Lin HC, Chen KH, Chen LC.  2013.  Anomalous quantum efficiency for photoconduction and its power dependence in metal oxide semiconductor nanowires. Nanoscale. 5:6867-6873.
Liu, YL, Hsu CW, Dhara S, Chang CW, Tsai HM, Chen LC, Chen KH, Pong* WF, Chi GC.  2013.  Atomistic nucleation sites of Pt nanoparticles on N-doped carbon nanotubes. Nanoscale. 5:6812-6818.
Hsu, HC, Shown I, Wei HY, Chang YC, Du HY, Lin YG, Wang CH, Chen LC, Lin YC, Chen KH.  2013.  Graphene Oxide based Photocatalyst for CO2 to Methanol Conversion. Nanoscale. 5:262-268.
Hwang, J-S, Liu T-Y, Chattopadhyay S, Hsu G-M, Basilio AM, Chen H-W, Hsu Y-K, Tu W-H, Lin Y-G, Chen K-H, Li C-C, Wang S-B, Chen H-Y, Chen L-C.  2013.  Growth of β-Ga2O3 and GaN nanowires on GaN for photoelectrochemical hydrogen generation. Nanotechnology. 24:055401.