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Dr. Siddharth Joshi
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  • Mysore, Karnataka, India
  • India
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I am...
Chemist, Physicist, User of nanotechnology products
My research field or area of interest innanotechnology
Polymer thin films preparation and characterization,
Organic thin films based devices (OFETs, OPVs),
Inorganic Photovoltaic devices,
Thin film morphology,
Wet Chemical analysis,
Electrochemistry,
Surface modification (surface grafting, electro-deposition, self assembled monolayers),
Materials structure/property relationships by means of various available surface science techniques (XRD, XPS, AFM, SEM, UV, optical Microscopy).
Interest in...
a. Organic/Inorganic thin film based devices like Organic Photovoltaics (OPVs) and Organic field effect transistors (OFETs), particularly on OPVs as a renewable energy source.

b. Polymer nanostructured thin films (diblock copolymers) morphological and structure-property characterization and interplay the change in surface morphology with swelling dynamics using state of the art techniques ellipsometry, atomic force microscopy, X-ray scattering methods.

c. Hydrogen fuel cells
Publication list
Talks (Selected) –
1. S. Joshi, S. Grigorian, U. Pietsch, P. Pingel, A. Zen, D. Neher: Structure and crystallinity study in thin films of poly(3-hexylthiophene) OFET layers, Abschlusskolloquium zum DFG Schwerpunktprogramm ‘’Organische Feldeffekttransistoren’’, Physikzentrum Bad Honnef, Bad Honnef, June 2007.

2. S. Joshi, S. Grigorian, U. Pietsch, P. Pingel, A. Zen, D. Neher: Temperature dependent structure and crystallinity study in thin films of poly(3-hexylthiophene) OFET layers, ‘’7th Autumn school on X-ray scattering from surfaces and thin layers’’, Smolenice, Slovakia, October 2007.

3. S. Joshi, S. Grigorian, U. Pietsch, P. Pingel, A. Zen, D. Neher: Temperature dependent structure and crystallinity studies of high molecular weight P3HTs. Wuppertal colloquium, Wuppertal, Germany, November, 2007.

4. S. Joshi, S. Grigorian, U. Pietsch, P. Pingel, A. Zen, D. Neher, M. Forster, U. Scherf: Temperature dependent X-ray diffraction studies of low and high molecular weight P3HTs, DPG Conference, Berlin, Germany, Feb 2008.



5. S. Joshi, S. Grigorian, T. Panzner, U. Pietsch, P. Pingel, D. Neher, M. Forster, U. Scherf: Temperature dependent X-ray diffraction studies of high molecular weight Poly(3-hexylthiophene) P3HTs fraction, 11th European Conference on Organised Films, Potsdam, Germany, July 2008.

Posters (Selected) –

1. S. Joshi, Mrunmaya Mudigere, L. Krishnamurthy, G. L. Shekar,: Synthesis and Characterization of an Inorganic Photovoltaic device using NiO/CuO/ZnO/ Composite materials, Indo-Canadian Symposium on Nano-Science and Technology (ICNST-2013), National Institute of Engineering, Mysore, Karnataka, India, February 2013.

2. S. Joshi, S. Grigorian, U. Pietsch, P. Pingel, A. Zen, D. Neher: X-ray studies of low and high molecular weight poly(3-hexylthiophene) thin films, ‘’Charge Transport in Organic Materials: From Single Molecules to Devices’’, DPG Physics school , Physikzentrum Bad Honnef, Bad Honnef, September 2007.

3. S. Joshi, S. Grigorian, U. Pietsch, A. Zen, D. Neher: “X-ray studies of structure and crystallinity of poly(3-hexylthiophene)”, DPG conference, Regensberg, Germany, March 2007.

4. S. Joshi, S. Grigorian, U. Pietsch, A. Zen, D. Neher: ‘Structure and crystallinity study in thin films of poly(3-hexylthiophene)’ SNI conference, Hamburg, Germany, October 2006.


Publications –

1. S. Joshi, S. Grigorian, U. Pietsch, X-ray Structural and Crystallinity studies of low and high molecular weight Poly(3-hexylthiophene), Physica status solidi (a) 205, 488-496, 2008.

2. S. Joshi, S. Grigorian, U. Pietsch, P. Pingel, A. Zen, D. Neher, Thickness dependence of the crystalline structure and electron mobility in thin films of low molecular weight Poly(3-hexylthiophene), Macromolecules, 41, 6800-6808, 2008.

3. S. Joshi, S. Grigorian, U. Pietsch, P. Pingel, A. Zen, D. Neher, Michael Forster, Ullrich Scherf, Bi-modal temperature behaviour of structure and mobility for HMW P3HT thin films, Macromolecules, 42, 4651, 2009, 2009.



4. S. Grigorian, S. Joshi, U. Pietsch, Temperature dependent structural
properties of P3HT films, Material Science and Engineering, 14, 012007, 2010, (IOP conf. Series).

5. S. Joshi et al., Time dependent swelling and structural formation of poly(styrene-b-2vinylpyridine) diblock copolymer thin films, Manuscript under preparation, 2010.

6. S. Joshi et al., Cobalt complex based photoanodes for photoelectrochemical solar water splitting under preparation, 2011.

7. S. Joshi et al., Morphological Studies of NiO/CuO/ZnO based Composite materials and its application towards Solar Cell, Indian Journal of Engineering & Materials Sciences, Submitted, 2013.


Communications (Selected) –

1. Synchrotron based X-ray diffraction study of Poly(3-hexylthiophene) – a π conjugated polymer (2006) Joshi S, Grigorian S, Pietsch U, Zen A, Neher D, Delta Annual report, University Dortmund, Dortmund, Germany.

2. Thickness dependent ordering and orientation of low molecular weight poly(3-hexylthiophene) OFET layers (2007) Joshi S, Grigorian S, Pietsch U, Pingel P, Zen A, Neher D, Delta Annual report, University Dortmund, Dortmund, Germany.

3. X-ray diffraction studies from surfaces and interfaces of high molecular weight poly(3-hexylthiophene) P3HT fraction 2007 Joshi S, Grigorian S, Pietsch U, Pingel P, Zen A, Neher D, Forster M and U. Scherf, Hasylab (Desy) annual report, Hamburg, Germany

4. X-ray diffraction studies of thick Vs thin films of low and high molecular weight poly(3-hexylthiophene) P3HT fraction 2008 Joshi S, Grigorian S, Pietsch U, Pingel P, Zen A, Neher D, Forster M and U. Scherf, Delta Annual report, University Dortmund, Dortmund, Germany

5. Analysis of nanocrystalline structure in thin poly(3-hexylthiophene) films 2008 Joshi S, Grigorian S, Kara C, Pietsch U, ESRF annual report, Grenoble, France.

Book Chapter

1. S. Joshi, S. Grigorian, U. Pietsch,
‘‘Physical and Chemical Aspects of Organic electronics – From fundamentals to functioning devices’’, April 2009, Wiley-VCH, Berlin.
Researchgroup, Institute, University, School, Company name
Centre of Nano-Tehnology, NIE Mysore
Researchgroup, Institute, Company, University, School webpage
http://nie.ac.in
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