Synthesis and Nonlinear Optical Studies on Organic Compounds in Laser-Deposited Films

Abstract

Organic semiconductors as active materials in thin-film electronic devices such as alkynes, heterocycles, dyes, ferrocenes, spiranes, or porphyrins, with special geometries and certain electronic molecular parameters, which possess nonlinear optical (NLO) properties and offer several major advantages over their inorganic counterparts, are presented in this chapter. There are a number of simple and versatile techniques that can be employed for the deposition of these important classes of materials. The matrix-assisted pulsed laser evaporation (MAPLE) technique provides advantages with regard to making organic films of different morphologies on different types of substrates. New insights into the crystallization growth mechanisms in MAPLE-deposited conjugated polymer films, which realize the connection between the structure and the carrier transport properties, are discussed herein. Second harmonic generation (SHG) capabilities of the thin films were also investigated.

Theoretical Investigation of the Nonlinear Optical and Charge Transport Properties of N-(4-Methoxybenzylidene) Isonicotinohydrazone and Some of Its Derivatives: A DFT and TD-DFT Study

“…NLO and OLED technologies have received a lot of attention due to their applications in optical and fat-panel displays [8]. Owing to its potential applications in modern computers, optical data storage, communications, laser technology, and photonics, NLO materials have attracted the curiosity of many researchers [9]. Organic compounds containing π-delocalized electrons and push-pull mechanisms have attracted the attention of NLO investigators.…”

“…Prototypical compounds having NLO features, such as urea and para-nitroaniline (PNA) have such properties [10]. Organic NLO materials are more frequent than their inorganic counterparts due to their afordable fee, low toxicity, ease of solution processability, greater electro-optic coefcients, and fexibility [9,11,12]. Despite this, the key challenge in optoelectronic engineering continues to be the development of organic materials with high thermal stability and NLO responsiveness.…”

Enhanced nonlinear optical response of graphene-based nanoflake van der Waals heterostructures

“…In the organic crystals, one of the largest b is reported to be 2 480 000 Â 10 À33 esu associated with thiophene compounds. 77,78 The calculated results clearly show that the NLO coefficients for the graphene/phosphorene heterostructures have signicantly higher values than those for graphene/BN. It can be associated with the anisotropic nature of phosphorene leading to distinctly different structural and electronic properties compared to those exhibited by the atomically at BN nano-akes.…”

Synthesis, Characterization, DFT Studies, and NLO Properties of Some Benzimidazole Compounds

“…During the last decades, nonlinear optical (NLO) materials have played a significant role because of their various applications in medicine, molecular switches, luminescent materials, laser technology, spectroscopic and electrochemical sensors, data storage, microfabrication and imaging, modulation of optical signals, and telecommunication [1][2][3]. Organic materials are distinguished by the fact that they exhibit strong NLO properties [2][3][4].…”

“…During the last decades, nonlinear optical (NLO) materials have played a significant role because of their various applications in medicine, molecular switches, luminescent materials, laser technology, spectroscopic and electrochemical sensors, data storage, microfabrication and imaging, modulation of optical signals, and telecommunication [1][2][3]. Organic materials are distinguished by the fact that they exhibit strong NLO properties [2][3][4]. Recent literature highlights the increased interest in organic materials in recent decades, as an alternative to their inorganic counterparts, and having several advantages, such as their low cost, low toxicity, ease of solution processability, flexibility for device fabrications [5], and modulation of their optical, electronic, and chemical properties by adapting their molecular structure.…”