unniScientific Publications  

    Home   |  Education   |  Experience   |  Research Interests   |  Publications    |  Family 



Refereed Journal Publications
Papers presented at International Conferences
Papers presented at National Conferences


Refereed Journal Publications

Total citations: 140 (on 1 February 2009, as per www.scopus.com)
  1. K.N. Narayanan Unni, Sylvie Dabos-Seignon, Ajay K. Pandey, Jean-Michel Nunzi, Influence of the polymer dielectric characteristics on the performance of pentacene organic field-effect transistors, Solid-State Electronics , 52 (2), (2008) 179-181. Times Cited: 1


  2. K.N. Narayanan Unni, Ajay K. Pandey, Salima Alem, Jean-Michel Nunzi, Ambipolar Organic field-effect transistor fabricated by co-evaporation of pentacene and N,N' -ditridecylperylene -3, 4, 9, 10-tetracarboxylic diimide, Chemical Physics Letters, 421 (2006)554 Times Cited: 12


  3. A.K. Pandey, K. N. Narayanan Unni and J.-M. Nunzi, Pentacene-perylene codeposited solar cell, Thin Solid Films, 511-512 (2006) 529. Times Cited: 7


  4. S. Alem, A. K. Pandey, K.N. Narayanan Unni, J. –M. Nunzi and P. Blanchard, Molecular Model T6:C60 Bulk Heterojunction Solar Cells, Journal of Vacuum Science and Technology, A24 (2006) 645. Times Cited: 1


  5. K. N. Narayanan Unni, Sylvie Dabos-Seignon, Jean-Michel Nunzi, Influence of the polymer dielectric characteristics on the performance of a quarterthiophene organic field effect transistor, Journal of Materials Science, 41 (2006)1865


  6. K. N. Narayanan Unni, A.K. Pandey, Jean-Michel Nunzi, N–channel organic field-effect transistors using N,N' –ditridecylperylene -3, 4, 9, 10 -tetracarboxylic diimide and a polymeric dielectric, Chemical Physics Letters, 407, (2005) 95-99. Times Cited: 1


  7. Pawan Kumar Tyagi, Abha misra, K.N. Narayanan Unni, Padmanabh Rai, Manoj K. Singh, Umesh Palnitkar, D. S. Misra, F. Le Normand, Mainak Roy and S. K. Kulshreshtha, Step growth in a single crystal diamon grown by Microwave Plasma Chemical Vapor Deposition, Diamond and Related Materials, 15 (2-3), (2006) 304-308.


  8. K. N. Narayanan Unni, Sylvie-Dabos Seignon, and Jean-Michel Nunzi, Improved performance of a pentacene field-effect transistor using polyimide gate dielectric layer, Journal of Physics D: Applied Physics, 38, No. 8, (2005) 1148-1151. Times Cited: 22


  9. K. N. Narayanan Unni, Remi de Bettignies, Sylvie Dabos-Seignon, and Jean-Michel Nunzi, A nonvolatile memory element based on a Quaterthiophene field-effect transistor, Materials Letters, 59, issue 10 (2005), 1165-1168. Times Cited: 2


  10. K.N. Narayanan Unni, Remi de Bettignies, Sylvie Dabos-Seignon, and Jean-Michel Nunzi, An organic field effect transistor as a nonvolatile memory element, Applied Physics Letters, 85 (2004) 1823–1825. Times Cited: 42


  11. K. N. Narayanan Unni, Remi de Bettignies, Sylvie Dabos-Seignon, and Jean-Michel Nunzi, The memory effect of a pentacene field-effect transistor with a polarizable gate dielectric, Proc. SPIE Int. Soc. Opt. Eng., 5351 (2004) 166. Times Cited: 1


  12. E. Titus, M. K. Singh, K.N.N. Unni, P.K. Tyagi, A.K. Dua , Mainak Roy and D.S. Misra, Diamond nucleation and growth on zeolites, Diamond and Related Materials, 12 (2003) 1647-1652. Times Cited: 2


  13. Umesh Palnitkar, V.S.Shirodkar, Manoj K. Singh, Elby Titus, P.K.Tyagi, K.N.N. Unni, D.S. Misra, P. Ayuub, and D.K. Avasthi, Effect of heavy ion irradiation on self supported diamond sheets, Diamond and Related Materials, 12 (2003) 1771-1775.


  14. K.N. Narayanan Unni, Optical characterization of Europium diphthalocyanine thin films, Materials Letters, 57 (2003) 2215. Times Cited: 4


  15. K.N. Narayanan Unni, and C.S. Menon, Electrical and optical studies on europium diphthalocyanine thin films, Journal of Materials Science Letters, 20 (2001) 1203. Times Cited: 3


  16. K.N. Narayanan Unni, and C.S. Menon, Electrical and optical studies on metal-free phthalocyanine thin films, Journal of Materials Science Letters, 20 (2001) 1207. Times Cited: 8


  17. C.M. Joseph, K.N. Narayanan Unni, and C.S. Menon, Static induction transistor characteristics of organic copper phthalocyanine thin films, Materials Letters, 50 (2001) 18. Times Cited: 3


  18. K.N. Narayanan Unni, and C.S. Menon, Electrical and optical studies on nickel phthalocyanine thin films, Journal of Materials Science Letters, 19 (2000) 2003. Times Cited: 4


  19. K.N. Narayanan Unni, and C.S. Menon, Conductivity studies on sandwich structures of metal-free phthalocyanine (H2Pc) thin films using gold electrodes, Indian Journal of Pure and Applied Physics , 39 (2001) 159. Times Cited: 3


  20. K.N. Narayanan Unni, and C.S. Menon, Electrical, optical and structural studies in nickel phthalocyanine thin films, Materials Letters, 45 (2000) 326. Times Cited: 15


  21. K.N. Narayanan Unni, and C.S. Menon, Studies on transport properties of nickel phthalocyanine thin films using gold electrodes, Solid state Physics (India), 41 (1998) 486.


  22. K.N. Narayanan Unni, and C.S. Menon, Grain size determination of vacuum evaporated thin films of nickel phthalocyanine, Asian Journal of Physics, 6 (1997) 417.



Papers presented at International Conferences


  1. A.K. Pandey, K.N. Narayanan Unni and J.-M. Nunzi, Pentacene-perylene codeposited solar cell, E-MRS, May 31-June 3, Spring meeting, 2005, Strasbourg, France.


  2. A.K. Pandey, K.N. Narayanan Unni, H. Wang, C. C. Oey, A. B. Djurisic, M. H. Xie, Y. H. Leung, K. K. Y. Man, W. K. Chan, P. C. Chui and J. -M. Nunzi, Improved performance of organic nano-composite solar cells with reverse bias annealing, 10th International Conference ERPOSE , July 10-15 2005, Cargese, France.


  3. K.N. Narayanan Unni, Ajay K. Pandey, Sylvie-Dabos Seignon, Jean-Michel Nunzi, Influence of polymer dielectric characteristics on the performance of a pentacene organic field-effect transistor, Photonics 2004, Jan 9-11, 2004, Cochin, India


  4. K.N. Narayanan Unni, Remi de Bettignies, Sylvie Dabos-Seignon, Jean-Michel Nunzi, Memory effect of a quaterthiophene organic field effect transistor with a polarizable dielectric, Materials Research Society Symposium, April 12-15, 2004, San francisco, USA.


  5. K.N. Narayanan Unni, Remi de Bettignies, Sylvie Dabos-Seignon, Jean-Michel Nunzi, Memory effect of a pentacene field effect transistor with a ferroelectric polymer as gate insulator, Photonics west (SPIE) 2004, Jan 25-29, San jose USA.


  6. K.N.Narayanan Unni, P.K. Tyagi and D.S. Misra, Microporous diamond films on zeolites, E. Titus, M.K. Singh, 8th International Conference: New Diamond Science and Technology 2002, 21-26 July , Melbourne, Australia.


  7. Umesh Palnitkar, V.S. Shirodkar, Manoj K. Singh, Elby Titus, P.K. Tyagi, K.N.Narayanan Unni, D.S. Misra, P. Ayuub, and D.K. Avasthi, Effect of heavy ion irradiation on self supported diamond sheets, 8th International Conference: New Diamond Science and Technology 2002, 21-26 July, Melbourne, Australia.


Papers presented at National Conferences


  1. E. Titus, M.K. Singh, P.K. Tyagi, K.N. Narayanan Unni, A.K. Dua, Mainak Roy and D.S. Misra, Growth of porous diamond films for sensors and filters, DAE - Solid State Physics Symposium (SSPS - 2002), Panjab University Chandigarh-160014, India, December 26-30, 2002.


  2. M.K. Singh, E. Titus, Pawan K. Tyagi, K.N.Narayanan Unni and D.S. Misra, Growth of high density Ni and Ni/Pt filled carbon nanotubes through MPCVD routes, DAE - Solid State Physics Symposium (SSPS - 2002), Panjab University Chandigarh-160014, India, December 26-30, 2002.


  3. K.N. Narayanan Unni and C. S. Menon, Electrical conductivity, optical absorption and structural studies in nickel phthalocyanine thin films, National Seminar on Current Trends in Materials Science, Mahatma Gandhi University, Kottayam, India, March 23-24, 2001.


  4. K.N. Narayanan Unni and C.S. Menon, Optical characterization of metal-free phthalocyanine thin films, 12th Kerala Science Congress, Kumily, India, January 3-7 2000.


  5. K.N. Narayanan Unni and C.S. Menon, Investigations on the sandwich structures of phthalocyanine thin films using gold electrodes, National Seminar on Recent Trends in Materials Science (NSRTMS-99), S. V. University, Tirupati, India, November 25-27, 1999.


  6. K.N. Narayanan Unni and C.S. Menon, Growth and electrical characterisation of phthalocyanine thin films, 9th Swadesi Science Congress, Kollam, India, November 25-27, 1999.


  7. K.N. Narayanan Unni and C.S. Menon, Electrical conductivity studies on air annealed phthalocyanine thin films, 11th Kerala Science Congress, Kozhikodu, India, 27 Feb-1 March, 1999.


  8. K.N. Narayanan Unni and C. S. Menon, Studies on the transport properties of nickel phthalocyanine thin films using gold electrodes, DAE Solid State Physics Symposium, Kurukshetra University, India, December 27-31, 1998.


  9. K.N. Narayanan Unni and C.S. Menon, Determination Of Thermal Activation Energy from the DC Electrical Conductivity Studies on Metal-Free Phthalocyanine Thin Films, 10th Kerala Science Congress, Kozhikodu, India, January 2-4, 1998.


  10. K.N. Narayanan Unni and C.S. Menon, Electrical Conductivity Studies in Metal-Free Phthalocyanine Thin Films, XXVIII National Seminar on Crystallography, Mahatma Gandhi University, Kottayam, India, September 24-26, 1997.


  11. K. P. Krishnakumar, K.N. Narayanan Unni, S. Ambily and C. S. Menon, Determination of the Optical Band gap in some Organic Semiconductors from the Absorption Spectra MgPc, NiPc and PbPc, Symposium on Current Topics in Physics Of Materials, Hyderabad Central University, Hyderabad, India, March 27-29, 1997.


  12. K.N. Narayanan Unni, S. Ambily, K. P. Krishnakumar and C. S. Menon, Determination of Thermal Activation Energy from Electrical Conductivity Measurement in Organic Semiconductors, Symposium on Current Topics in Physics Of Materials, Hyderabad Central University, Hyderabad, India, March 27-29, 1997.


  13. S. Ambily, K.N. Narayanan Unni, K.P. Krishnakumar and C. S. Menon, Determination of the Structure and Grain Size from XRD Pattern of Some Organic Semiconductors CoPc, NiPc and MgPc, Symposium on Current Topics in Physics of Materials, Hyderabad Central University, Hyderabad, India, March 27-29, 1997.


  14. K.N. Narayanan Unni and C.S. Menon, Studies on the Optical Absorption in Air-annealed Nickel Phthalocyanine Thin Films, 9th Kerala Science Congress, Trivandrum, India, January 27-29, 1997.


  15. K.N. Narayanan Unni and C.S. Menon, Structural Studies on Nickel Phthalocyanine Thin Films, 7th National Seminar on Crystal Growth, Alagappa University, Karaikudy, India, January 6-8, 1997.


  16. K.N. Narayanan Unni and C.S. Menon, Effect of Iodine doping on the Electrical and Optical Properties of Nickel Phthalocyanine Thin Films, 84th Indian Science Congress, New Delhi, India, January 3-8, 1997.


  17. K.N. Narayanan Unni and C.S. Menon, Electrical Properties of Vacuum-annealed and Air-annealed Nickel Phthalocyanine Thin Films, National Conference on Thin Film Characterization and Applications, Bharatiar University, India, June 10-12, 1996.


  18. K.N. Narayanan Unni and C.S. Menon, Electrical Conductivity Studies on Nickel Phthalocyanine Thin Films, National Seminar on Fundamentals of Crystal Growth, Anna University, Madras, India, January 28-30, 1996.


  19. K.N. Narayanan Unni and C.S. Menon, Electrical and Optical Properties of Copper Selenide Thin Films, National Conference on Developments in Electronic Materials and Their Applications, Shivaji University, Kolhapur, India, March 6-8, 1995.