Fabrication and characterization of polyaniline/porous silicon heterojunction

Kumar, Pawan; Adhikari, Sarbani; Banerji, P.

doi:10.1016/j.synthmet.2010.05.011

Cited by 29 publications

(19 citation statements)

References 41 publications

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“…[35][36][37][38][39] In the present work, the R s of the fabricated NPOT/SiNWs has become lower than the published values. This finding may be explained as being due to the use of SiNWs, providing a 1-D nanowire array which offers a promising substrate with a direct pathway for charge transport and a high mobility for carriers.…”

Section: − V Characteristics Of the Synthesized Heterojunctioncontrasting

confidence: 63%

Heterojunction of poly (o-toluidine) and silicon nanowires

et al. 2015

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Abstract. A nanostructured poly (o-toluidine)/silicon nanowires (NPOT/SiNWs) heterojunction has been fabricated with a low cost and simple techniques, where NPOT has been in situ polymerized upon SiNWs synthesized by chemical etching of a silicon wafer. The morphology of SiNWs before and after deposition of NPOT has been examined by scanning electron microscope (SEM). The chemical composition of NPOT has been investigated by Fourier transform infrared (FTIR), ultraviolet-visible (UV-visible) spectroscopy, and X-ray diffraction (XRD) techniques. NPOT morphology has also been examined by SEM before being deposited on the SiNWs. I-V measurements of the device have been made at room temperature under dark conditions. The heterojunction diode parameters such as turn-on voltage, reverse saturation current (I 0 ), ideality factor (η), barrier height (Φ B ) and series resistance (R s ) have been determined from the I − V curves using Schottky equations. The device shows promising characteristics as a candidate for producing heterojunction diodes. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Section: − V Characteristics Of the Synthesized Heterojunctioncontrasting

confidence: 63%

Heterojunction of poly (o-toluidine) and silicon nanowires

et al. 2015

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“…1(a) demonstrates several sharp peaks approximately at 9.80, 17.03, 18.45, 20.51, 23.06, 24.19, and 25.04 corresponding to crystal plane (001), (012), (003), (100), (020), (110), and (111), respectively. We do admit that the XRD pattern for the DBSA-doped-PAni is not similar to the reported one of PAni, [9][10][11][12] probably due to the difference of preparing method and the effect of DBSA in media. Furthermore, it is known from the literature 9-12 that the XRD of PAni clearly suggests that the system is generally amorphous.…”

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confidence: 65%

Polyaniline micro-rods based heterojunction solar cell: Structural and photovoltaic properties

Sönmezoğlu

Taş

Akın

et al. 2012

Applied Physics Letters

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The present paper reports the fabrication and photovoltaic characterization of pure and dodecyl benzene sulfonic acid (DBSA)-doped polyaniline (PAni) micro-rods polymer/n-Si heterojunction solar cells, and also the morphological and structural properties of pure and micro-rods PAni doping with DBSA. The device shows a strong photovoltaic behavior with a maximum open-circuit voltage Voc of 0.83 V, a short-circuit current Jsc of 14.72 mA cm−2, fill factor FF of 0.54 resulting in an estimated device efficiency η of 6.13% under simulated solar light with the intensity of 100 mW/cm2. The results indicate that the Au/DBSA-doped PAni micro-rods/n-Si heterojunction structure might be promising for the solar cell applications.

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“…Scheme depicts the method used to immobilize aniline in the pores of the pSi. This functionalization process is often used to immobilize different proton‐containing substrates on silicon solid surfaces . At this stage, the excess amount of aniline remains adsorbed/absorbed on the pSi surface.…”

Section: Resultsmentioning

confidence: 99%

“…PANI is a well‐known hole‐conducting optoelectronic material that can absorb light energy to form excitons . The incorporation of PANI (p‐type, E g ≈ 1.90 eV) into the polar cavity of pSi:F (n‐type, E g ≈ 1.40 eV) allows the generation of an excellent interfacial junction for splitting the exciton into charge carriers .…”

Section: Resultsmentioning

confidence: 99%

“…However, π‐conjugated organic materials are recognized to have two main drawbacks, namely a low power conversion efficiency of less than 5% due to rapid exciton decay and photo‐bleaching of the photoactive components that limits their lifetime . Attempts to make organic–inorganic hybrid PV cells composed of π‐conjugated organic materials immobilized onto silicon and semiconducting metal oxides (ZnO, TiO 2 ) as feasible alternatives to the expensive wafers have appeared in recent years . In contrast to layer‐by‐layer stacking/bulk blending processes where the contact distance between the D and A is limited by the components' particle sizes, physical/chemical immobilization of π‐conjugated organic materials onto inorganic semiconductors and colloidal self‐assemblies of π‐conjugated polymers in polymeric matrix systems are advantageous as they limit the contact distance to the molecular level.…”

Section: Introductionmentioning

confidence: 99%

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Photoconductivity and photovoltaic properties of polyaniline immobilized onto metallurgical porous silicon powder

2012

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Photoactive composites comprising polyaniline and metallurgical silicon powder were prepared by an in situ two‐step procedure (pSi‐PANI). Their structures were elucidated by electronic and infrared spectroscopy and powder X‐ray diffraction (P‐XRD) techniques. The P‐XRD revealed that the acid‐doped green composites (pSi‐PANI·HCl and pSi‐PANI·HF) acquire a two‐dimensional crystalline array structure featuring nanosheet morphology. The photoconductivity and photovoltaic (PV) properties of these composites were examined as flexible microscopic films of finely dispersed composites in a dry linseed oil matrix sandwiched between two aluminium electrodes, [Alperforated/pSi‐PANI/Alplate]. The hybrid composites display a thermal voltage in the dark but develop a photocurrent under weak illumination (incandescent lamp, 75.4 µW cm–2). These green composites exhibit enhanced power conversion efficiency (Jsc = 16.7–34.0 μA cm–2, Voc = 0.86–1.21 V, η = 5.2%–11.4%) compared with their undoped blue analogs (Jsc = 1.3–6.1 μA cm–2, Voc = 0.18–1.02 V, η = 0.1%–2.1%). The pSi‐PANI·HCl composite is a promising candidate for the development of a low‐cost, easily processed, flexible PV system that can be scaled up for large‐area indoor applications. © 2012 Society of Chemical Industry

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Fabrication and characterization of polyaniline/porous silicon heterojunction

Cited by 29 publications

References 41 publications

Heterojunction of poly (o-toluidine) and silicon nanowires

Heterojunction of poly (o-toluidine) and silicon nanowires

Polyaniline micro-rods based heterojunction solar cell: Structural and photovoltaic properties

Photoconductivity and photovoltaic properties of polyaniline immobilized onto metallurgical porous silicon powder

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