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

Authors: Warda, Darenfad; Noubeil, Guermat; Kamel, Mirouh;

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

Abstract

У роботі повідомляється про розробку та характеристики нанокристалічних тонких плівок оксиду цинку (ZnO), нанесених на скляні підкладки методом спрей-піролізу. Досліджено вплив легування 1 % Mg та спільного легування 6 % F/x % Mg (x = 1, 2 and 3) на структурні, морфологічні, оптичні та електричні властивості отриманих плівок. Структурна характеризація показує, що всі нанесені шари є полікристалічними з гексагональною структурою типу вюрцит, оскільки фіксується більш інтенсивний пік відносно піку (002), який розташований поблизу 34,13°, без жодної іншої фази. Виміряні контактні кути становлять більше 90° для чистих, легованих та спільно легованих 6 % F/1 % Mg плівок, що підтверджує гідрофобний характер, тоді як інші спільно леговані плівки (6 % F:2 % Mg та 6 % F:3 % Mg) мають гідрофільний характер при значеннях контактного кута < 90°. Більш високе значення коефіцієнта пропускання 86,47 %, широка заборонена зона 3,53 еВ і менша ступінь розупорядкування (330,03 меВ) спостерігаються для плівки, спільно легованої 6 % F:1 % Mg. Спільне легування 1 % Mg значно покращує електропровідність (σ = 0,030 (Ω.см) – 1). Результати свідчать про те, що спільно леговану плівку ZnO (6 % F, 1 % Mg) можна використовувати як віконну плівку в тонкоплівкових сонячних елементах. 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 (σ = 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.

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Keywords

спільно легований F/Mg, гідрофобний, thin films, спрей-піроліз, ZnO, hydrophilic, контактний кут, hydrophobic, тонкі плівки, spray pyrolysis, гідрофільний, contact angle, F/Mg co-doped ZnO

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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