1) Room Temperature Photoluminescence Surface Mapping R.Jayakrishnan, Tina Sebastian, C.Sudha Kartha and K.P.Vijayakumar. International Conference on Materials for Advanced Technologies, Symposium Y: Optical Spectroscopic Techniques,3–8 July 2005, Singapore.
2)Comparative study of Cu rich and In rich CuInS2 Thin Films prepared Using Automated Spray System. Tina Sebastian, Teny Theresa John, R. Jayakrishnan, K. P.Vijayakumar, C.Sudha Kartha, Deepthi Jain and V.Ganeshan. International Conference on Optoelectronic Materials and Thin Films OMTAT-2005, 24-26th October 2005, Cochin, India.
3)Temperature and Temporal dependence of Photosensitivity of β- In2 S3 thin films under sub band gap excitation of 2.33 eV. R. Jayakrishnan, Teny Theresa John, C.Sudha Kartha and K.P.Vijayakumar International Conference on Materials for Advanced Technologies, Symposium J: Materials for Advanced Sensors and Detectors,1–6 July 2007, Singapore.
4)Role of intermediate bands of sprayed β- In2 S3 in sprayed CuInS2/In2S3 Solar cells, R. Jayakrishnan, Teny Theresa John, C.Sudha Kartha and K. P.Vijayakumar Proceedings of the International Conference on Solar Cells (IC-SOLACE), 21-23 Jan 2008, Cochin. p. 188