Morphological, optical and electrochemical properties of tin(II) 2,3-naphthalocyanine for organic electronic applications

Abstract

Herein, tin(II) 2,3-naphthalocyanine (SnNC) organic dye was successfully thermally deposited onto different optical transparent substrates such as glass, quartz, ITO, and FTO. FE-SEM technique reveals that SnNC film shows a uniform and symmetrical spherical-shaped with an average diameter of ∼50 nm. Annealing up to 473 K for 4 h increases the crystallite size of SnNC thin film. SnNC thin film shows absorption bands centered at 858 nm, 313 nm, and 249 nm with two shoulders at 775 nm and 350 nm. We present the absorbance, specular transmittance, specular reflectance and fluorescence properties of SnNc deposited on the different transparent substrates. The oscillator strengths (f) and the electric dipole strength (q2) of SnNC thin film were estimated from the molar absorptivity ( ε molar ) spectra. According to the Tauc model, two optical gap transitions were estimated as 1.03 eV and 3.48 eV. Annealing up to 473 K for 4 h slightly increases them to 1.15 eV and 3.59 eV, respectively. At excitation wavelength = 360 nm, two emission bands were observed at around 403 nm and 674 nm. Upon annealing at 373 K and 473 K, the real part of the refractive index of SnNC thin film decreases, which is correlated with a decrease in mass density. Electrochemical HOMO—LUMO band gaps of SnNC estimated from the cyclic voltammetry (CV) measurements ( E g C V = 1.12 eV ) agree well with the observed optical energy gap estimated from the optical measurements. The wide range absorption, emission, good thermal stability, suitable optical band gap, and electrochemical properties, prove an effective example of organic dye suitable for organic electronic applications.

Spectroscopic and electronic investigations on tin(II) 2,3-naphthalocyanine/p-Si heterojunction for optoelectronic applications

“…This behavior reflects that the measured reflectance of SnNc onto the p-Si wafer slightly depends on the irregular shapes of SnNc on the surface of the p-Si wafer. In the wavelength range of 190-700 nm, the reflectance of both SnNc/Glass and SnNc/ p-Si show multi-reflection peaks characterized by the Q-and Soret (B) bands [4]. In the wavelength range of 700-900 nm, both SnNc/Glass and SnNc/p-Si increase with increasing wavelength, and SnNc/Glass shows higher values than SnNc/p-Si.…”

“…Organic dyes have been introduced as semiconductor materials that can be used for the global modern electronic industry. Modern electronic industry based on organic dyes is an integrally interdisciplinary field, engaging experts in the physics and chemistry of electronics and the engineering of applied high-performance devices [1][2][3][4][5][6][7][8][9][10][11][12]. Organic semiconductor dyes have been used as photovoltaic solar cells, photodetectors, efficient lighting sources, and organic field-effect transistors may find their way into logic applications, memory, sensing, and a wide range of other medical applications.…”