Enhanced solar hydrogen generation of high density, high aspect ratio, coaxial InGaN/GaN multi-quantum well nanowires

ElKabbash, Mohamed; Kang, Jin-Ho; Lim, Seung-Gag; Ha, Jun‐Seok; Lee, June Key; Cho, Yong-Hoon; Ryu, Sang‐Wan

doi:10.1016/j.nanoen.2014.12.033

Cited by 101 publications

(75 citation statements)

References 27 publications

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“…This indicates the increase of IPCE efficiency to about 37%. Finally, the obtained values of IPCE, ABPE, and J ph of the present study are compared with the previously reported values of relevant or similar materials as shown in Table . The reported values in this study for IPCE and ABPE are higher than that previously obtained for the displayed materials or composites as shown in Table .…”

Section: Resultssupporting

confidence: 52%

Effect of plasmonic au nanoparticles on the photoactivity of polyaniline/indium tin oxide electrodes for water splitting

Rabia

Abukhadra

Ahmed

et al. 2019

Env Prog and Sustain Energy

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Three nanomaterials based on polyaniline (PANI) are prepared on indium tin oxide (ITO) and applied as electrodes for H2 generation due to the water‐splitting process. PANI/ITO films are prepared using oxidation polymerization method at 25°C, then coated with Au nanoparticles with different thicknesses (sputter time from 1 to 2 min). The three prepared electrodes; PANI/ITO (Electrode (0), 1‐min‐Au/PANI/ITO (Electrode (I)), and 2‐min‐Au/PANI/ITO (Electrode (II)) are compared for H2 generation from H2O. Scanning electron microscope, X‐ray diffraction, UV‐Vis spectrophotometer, and Fourier‐transform infrared spectroscopy analyses have been carried out, in which the average PANI crystal size was ~20 nm. Moreover, the bandgaps were determined, in which 2‐min‐Au/PANI/ITO has the optimum bandgap of 2.25 eV. The characteristic behavior of the H2 generation took place depending on the current density (Jph) value by using Jph–V and Jph–time study. Also, the incident photon‐to‐current conversion efficiency (IPCE) and the applied bias photon‐to‐current efficiency (ABPE) were calculated for the Electrode (II) at 25°C. The optimum IPCE and ABPE efficiency were 18.7 and 0.99%, respectively, at 390 nm. By increasing the temperature to 70°C, the IPCE efficiency increases to about 37%. Finally, activation energy (Ea), enthalpy (ΔH*), and entropy (ΔS*) were determined, in which the values were 24.32 kJ mol−1, 10.90 kJ mol−1, and 74.99 J K−1 mol−1, respectively. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13146, 2019

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Section: Resultssupporting

confidence: 52%

Effect of plasmonic au nanoparticles on the photoactivity of polyaniline/indium tin oxide electrodes for water splitting

Rabia

Abukhadra

Ahmed

et al. 2019

Env Prog and Sustain Energy

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“…Enhanced solar cells with various semiconductor nanowires and diverse formation of P/N junctions were widely reported based on the feature of high absorption of solar spectrum and collection of photogenerated carriers of nanowires [88][89][90][91][92][93][94][95][96][97]. Ebaid [98] investigated the combination between the band gap engineering and performance of solar cell by tuning the content of In, as shown in Fig. 18.…”

Section: Characterization Of Nanowires For Photovoltaicsmentioning

confidence: 99%

“…(b) The PL spectra showing the successful band gap engineering of InGaN alloy by altering the In content. (c) The PEC properties of the band gap engineered InGaN/GaN MQW-NWHs represented by the linear sweeps of the photocurrent as a function of the In content of the InGaN shells[98].…”

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confidence: 99%

Atomic-scale tomography of semiconductor nanowires

Ringer

Zheng

2015

Materials Science in Semiconductor Processing

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“…The hydrogen evolution reaction (HER), which hasg ained increasingi nterest as ac arbon-free route to H 2 generation,i sa classical approach to investigate ac hemical property. [25][26][27][28][29] The utilisation of III-nitrides emiconductors for photo-/electrochemical water splittingh as attracted considerable attention. [17][18][19][20] Galliumn itride (GaN) crystalsd isplayn umerous excellent properties,s uch as high carrierc oncentration, thermal conductivity and chemical stability.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic Properties of Macroscopically Tuned Gallium Nitride Single‐Crystalline Facets for Electrocatalytic Hydrogen Evolution

Chang

Sun

et al. 2019

Chemistry A European J

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The anisotropy of crystalline materials results in different physicala nd chemical properties on different facets, which warrants an in-depth investigation.M acroscopically facet-tuned,h igh-purity gallium nitride( GaN) single crystalsw ere synthesised and machined,a nd the electrocatalytic hydrogen evolution reaction( HER) wasu sed as the model reaction to show the differences among the facets. DFT calculations revealed that the Ga and Ns ites of GaN (100) had ac onsiderably smaller DG H* value than those of the metal Ga site of GaN (001) or Ns ite of GaN (00À1), therebyi ndicating that GaN (100) should be more catalyti-cally activef or the HER on accounto fi ts nonpolar facet. Subsequente xperiments testified that the electrocatalytic performance of GaN (100) was considerablym ore efficient than that of other facets for both acidic and alkalineH ERs. Moreover,t he GaN crystal with ap referentially (100) active facet had an excellently durable alkaline electrocatalytic HER for more than 10 days. This work provides fundamentali nsightsi nto the exploration of the intrinsic propertieso fm aterialsa nd designing advanced materials for physicochemical applications.

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Enhanced solar hydrogen generation of high density, high aspect ratio, coaxial InGaN/GaN multi-quantum well nanowires

Cited by 101 publications

References 27 publications

Effect of plasmonic au nanoparticles on the photoactivity of polyaniline/indium tin oxide electrodes for water splitting

Effect of plasmonic au nanoparticles on the photoactivity of polyaniline/indium tin oxide electrodes for water splitting

Atomic-scale tomography of semiconductor nanowires

Intrinsic Properties of Macroscopically Tuned Gallium Nitride Single‐Crystalline Facets for Electrocatalytic Hydrogen Evolution

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