Areas of Current Research Interest:

• Simulation of Channeling
• Thin Films
• Nanostructures
• Transparent Conducting Oxides
• Kesterite Thin Films
• Thin Film Solar Cells

Contributions to Teaching:

• Member, Board of Studies, Kannur University, Kannur
• Question Paper Setter for MSc Degree, University of Kerala
• Question Paper Setter for MSc Degree, University of Calicut
• Question Paper Setter for MSc Degree, CUSAT, Cochin
• Question Paper Setter for MSc Degree, M G University, Kottayam

Research Associate Fellowship:

Year: April 2001 – August 2003 Institution: Department of Chemical Engineering, Indian Institute of Technology, Bombay,Powai, Mumbai. Title: Characterization and prediction of equillibria and dynamics of polymer adsorption on solid surface Sponsor: Unilever (UK)

Projects:

Year: 2012 – 2015

Title: Fabrication studies of Copper-Indium-Selenide based thin film solar cells

Sponsor: Kerala State Council for Science Technology and Environment (KSCSTE)

Year: 2018-2020

Title: Earth-Abundant and Eco-Friendly Kersterite (CZTS) Thin Films for Sustainable Photovoltaic Technology (Ongoing)

Sponsor: Innovative Research Programme, Government of Kerala

List of Publications:

1. Structural, optical and electrical properties of Sn – N codoped p type ZnOthin films prepared by spray pyrolysis technique for diode applications - Narayanan Nripasree and Nangarath Kannoth Deepak, Materials Science and Engineering B 211 (2016) 121 – 127. DOI: http://dx.doi.org/10.1016/j.mseb.2016.06.012
2. Intense, broad and strongly coupled multiple photoluminescence in Zirconium doped ZnOthin films – Prasoonprasannan, P.Jayaram, N K Sufikarali and N K Deepak, Research Journal of Material Sciences, 4(2), 2016, 1-4.
3. Exotic orange to green luminescence conversion in vacuumannealed ZnO:Sn thin films- Nripasree Narayanan and N. K. Deepak, Optik – International Journal for Light and Electron Optics 127 (2016) 9821–9827. DOI: http://dx.doi.org/10.1016/j.ijleo.2016.07.089
4. Enhance mant of optical and electrical propereties of ZnO thin films using indium doping – Prasoon Prasannan and N K Deepak, International Journal of Current Research, 8(11),2016
5. Structural modification and band gap engineering of sol–gel dip-coated thin films of Zn 0.75 Mg 0.25 O alloy under vacuum annealing - Nripasree Narayanan and N. K. Deepak, Pramana – Journal of Physics 87 (2016) 87. DOI: http://dx.doi.org/10.1007/s12043-016-1300-0
6. Microstrucure analysis and multiple photoluminescence in high temperature electronic conducting In Zr ZnO thin films - P Jayaram, Prasoon Prasannan, N K Deepak and P P Pradyumnan, International journal of materials and metallurgical engineering, 10 (6),2016
7. Exploring p type conductivity in ZnO thin films by In–N codoping for homo-junction devices - Nripasree Narayanan and Nangarath Kannoth Deepak, Journal of Materials Science: Materials in Electronics 28 (2017) 5962 – 5970. http://dx.doi.org/10.1007/s10854-016-6270-y
8. Cation substitution induced blue-shift of optical band gap in nanocrystalline Zn (1-x) Ca x O thin films deposited by sol–gel dip coating technique - Nripasree Narayanan and N. K. Deepak, Bulletin of Materials Science 40 (3) (2017) 561 – 568. DOI: http://dx.doi.org/10.1007/s12034-017-1392-2
9. Band gap bowing of nanocrystalline Zn (1-x) Ca x O thin films for blue and ultraviolet optoelectronic applications - Nripasree Narayanan and N. K. Deepak, Solid State sciences 71 (2017) 42 – 50. DOI: http://dx.doi.org/10.1016/j.solidstatesciences.2017.07.001
10. Impact of N doping on the physical properties of ZnO thin films, Surface Review and Letters- Nripasree Narayanan and N. K. Deepak, 25(1) (2018) 1850035. DOI: http://dx.doi.org/10.1142/S0218625X1850035X
11. Dopant induced band gap broadening and conductivityenhancement of Al doped Zn 0.85 Ca 0.15 O thin films - Nripasree Narayanan and N. K. Deepak, Journal of Materials Science: Materials in Electronics 29(1) (2018) 628 – 636. DOI: http://dx.doi.org/10.1007/s10854-017-7955-6
12. Micro-strain, Dislocation density, surface morphology and optoelectronic properties of Indium Zinc Oxide thin films – Prasoon Prasannan, P Jayaram, N K Sulfikkarali and N K Deepak, International journal of research in advent technology, 6 (12), 2018
13. Enhancement of visible luminescence and photocatalytic activity of ZnO thin films via Cu doping - Nripasree Narayanan and N. K. Deepak, Optik - International Journal for Light and Electron Optics 158 (2018) 1313 – 1326. DOI: https://doi.org/10.1016/j.ijleo.2018.01.024
14. B-N Codoped p Type ZnO Thin Films for Optoelectronic Applications - Nripasree Narayanan and N. K. Deepak, Materials Research 21(1) (2018) e20170618 DOI: http://dx.doi.org/10.1590/1980-5373-MR-2017-0618.
15. Realizing luminescent downshifting in ZnO thin films by Ce doping with enhancement of photocatalytic activity - Nripasree Narayanan and N. K. Deepak,Solid State Sci. 78 (2018) 144 – 155 DOI: http://dx.doi.org/10.1016/j.solidstatesciences.2018.02.017.
16. Praseodymium – A Competent Dopant for Luminescent Downshifting and Photocatalysis in ZnO Thin Films - Nripasree Narayanan and N. K. Deepak, Z.Naturforsch. 73(5)a (2018) 441–452. DOI: http://dx.doi.org/10.1515/zna-2017-0430.
17. Amelioration of photocatalytic activity of ZnO thin films by Er doping - Nripasree Narayanan and N. K. Deepak, Journal of Materials Science: Materials in Electronics 29 (2018) 8774 – 8784. DOI: http://dx.doi.org/10.1007/s10854-018-8894-6.
18. Melioration of Optical and Electrical Performance of Ga-N Codoped ZnO Thin Films -Nripasree Narayanan and N. K. Deepak, Z. Naturforsch. DOI: http://dx.doi.org/10.1515/zna-2017-0386.
19. Ga dopant induced band gap broadening and conductivity enhancement in spray pyrolysed Zn 0.85 Ca 0.15 O thin films - Nripasree Narayanan and N. K. Deepak, Materials Research 2018; 21(6): e20180034. DOI:http://dx.doi.org/10.1590/1980-5373-MR-1018-0034.
20. Prasoon Praannan, N.K.Deepak, N.K. Sulfukkarali , P. Jayaram, Thermoelectric properties of ZrxInxZn1-xO1-δ thin films, Advanced Materials Letters, 12 (1), 2020, 21011596.
21. Radioactive decay of 288−296Og via heavy cluster emission within a modified generalized liquid drop model with a Q-value-dependent preformation factor K. P. Santhosh, Tinu Ann Jose, and N. K. Deepak, Phys. Rev. C 103, 064612 – P21 June 2021.

Seminars/Conferences:

1. Prasoonprasannan and N K Deepak, Role of semiconductors in chaos generator,UGC-National Seminar on Dynamical systems and chaos, P G Department of Physics,St. Mary’s college, Sulthan BAtheri, India, 25-27 January 2016.
2. Nripasree Narayanan and N. K. Deepak, B – N codoped p type transparent conductive ZnO thin film interconnect layer for energy efficient tandem thin film solar cells,Presented in 28 th Kerala Science Congress, 28 – 30 January 2016, University ofCalicut, Thenjipalam.
3. Nripasree Narayanan and N. K. Deepak, Luminescent downshifting with enhanced photocatalytic activity in ZnO thin films via Sm doping, Presenterd in ‘Three –day Golden Jubilee National Seminar on Science and Technology of New Materials for Sustainable Future (STNM-2018)’, 7 – 9 February 2018, Department of Physics, University of Calicut, Thenhipalam.
4. Nripasree Narayanan and N. K. Deepak, Realizing p type electrical conductivity in ZnO thin films by Sn-N codoping, Presented in Two-day National Seminar on ‘Advanced Materials’, 15 – 16 March 2018, Department of Chemistry, Kannur University.
5. Nripasree Narayanan and N. K. Deepak, Band gap engineering of ZnO thin films by Ca 2+ substitution and amelioration of physical properties by In doping, Presented in Two-day National Seminar on ‘Advanced Materials’, 19 – 20 March 2018, Department of Physics, Kannur University.