A Comparative Study on the Optoelectronic Performance of Undoped, Mg-doped and F/Mg Co-doped ZnO Nanocrystalline Thin Films

Abstract

This work reports on the development and characterization of Zinc Oxide (ZnO) nanocrystalline thin films deposited on glass substrates by spray pyrolysis method. The effect of 1 % Mg-doping and 6 % F/ x % Mg co-doping (x  1, 2 and 3) on the structural, morphological, optical and electrical properties of the films obtained is studied. The structural characterization shows that all the deposited layers are polycrystalline with a hexagonal wurtzite-type structure due to the existence of a more intense peak relative to the (002) peak, located around an angle of 34.13° with no other phase detected. The measured contact angles are more than 90° for pure, doped and 6 % F/1 % Mg co-doped films prepared, which confirms the hydrophobic character, while other co-doped films (6 % F:2 % Mg and 6 % F:3 % Mg) show the hydrophilic character at values of the contact angle  90°. A higher transmittance value of 86.47 %, a wide band gap of 3.53 eV and lower disorder (330.03 meV) are observed for the 6 % F:1 % Mg co-doped film. Co-doping with 1 % Mg considerably improves the electrical conductivity (  0.030 (Ω.cm) -1 ). The results suggest that the co-doped ZnO film (6 % F, 1 % Mg) can be used as a window film in thin film solar cells.

Super-Hydrophobic F-Doped SnO2 (FTO) Nanoflowers Deposited by Spray Pyrolysis Process for Solar Cell Applications

“…This behavior is similar to the results reported in the literature, such as Ni-doped SnO2 [5] and Zn-doped SnO2 thin films [6]. This character presents a promising feature for photocatalytic [7] and gas sensor [3,14,15] applications. This behavior could be attributed to the effect of layer density, surface roughness and dopant level.…”

“…Among the methods for producing thin layers of tin dioxide, our choice fell on the spray pyrolysis process. The many advantages offered by this process (simplicity, lower cost and good homogeneity of the films produced) [5][6][7][8] justify the choice of this method.…”

Effect of Cu-Doping Levels on the Structural and Optical Properties of SnO2 Thin Films Prepared by Chemical Spray Pyrolysis

“…Transparent conducting oxides (TCOs) are attractive materials due to good conductivity, high transparent with direct band gap energy of approximately (3.6 eV) [1][2][3][4]. In recent decades, undoped and doped materials or composites based on tin oxide (SnO2) have been extensively studied for various practical applications, such as optical waveguides, phosphors, transparent Conductive oxides, gas sensors and UV emitters [5][6][7]. The properties of tin dioxide films were improved by adding several dopants, such as: Ni, Zn, F, Mg, Co, Mn and Cu [8][9][10][11][12][13].…”

Analisis Struktur Kristal Dan Absorbansi Lapisan Tipis Zno Berstruktur Nano Di Atas Substrat Kaca Berpelapis Indium Tin Oxide

“…Terdapat beberapa metode yang biasa digunakan untuk mendeposisikan lapisan tipis ZnO di antaranya metode kimiawi basah, sputtering (Dave dkk., 2016), Chemical Vapor Deposition (CVD) (Liang, 2019), sol gel, spray pyrolisis, physical vapor deposition, solvothermal dan hydrothermal (Lee dkk., 2008) Ultrasonic Spray Pyrolysis merupakan sebuah teknik deposisi dengan cara mengatomisasi larutan secara ultrasonik hingga menghasilkan partikel tipis yang memiliki distribusi ukuran kecil untuk pelapisan pada substrat [16]. Metode ultrasonic spray pyrolysis merupakan metode yang sudah lama dipakai untuk membuat lapisan tipis.…”