Ultrafast Spectroscopy and Nonlinear Optical Studies of Novel Organic and Inorganic Semiconductors for Optoelectronic Applications

The fundamental objective of this thesis was to comprehend the fundamental Photophysics involving ultra-short time scale and for that purpose femtosecond transient absorption spectroscopy is utilized in combination with other steady state and nonlinear optical measurement tools to bring out the wide applicability in the field of organic photo-voltaic, organic-light-emitting-diodes, non-linear optical devices etc., of few novel organic and inorganic molecules. The first chapter briefly reviewed the contextual background that underlies the discussion of the results presented in the rest of the thesis. The second chapter describes different experimental techniques applied in combination to study the photo-induced behavior of different molecular systems and are discussed both from technical and theoretical points of view. Chapter 3 to 7 discusses the main results and chapter 8 concludes the thesis outlining the future perspectives.