Chapters authored
Injection and Optical Spectroscopy of Localized States in II-VI Semiconductor Films
Part of the book: Advanced Aspects of Spectroscopy
Nanostructured ZnO, Cu2ZnSnS4, Cd1−xZnxTe Thin Films Obtained by Spray Pyrolysis Method
The paper presents the investigation on the influence of substrate temperature Ts and the sprayed initial solution volume Vs on structural, substructural, optical properties, and elemental composition of ZnO and Cu2ZnSnS4 (CZTS) films as well as state-of-the-art of studying the Cd1−xZnxTe (CZT) films obtained by spray pyrolysis technique. The single-phase nanocrystalline ZnO films with average crystallite size of DC = 25–270 nm and thickness of d = 0.8–1.2 μm can be deposited at substrate temperatures of Ts > 473 K. The continuous CZTS films with optimal thickness (d = 1.3 μm) for application as absorber layers in solar cells were deposited at the sprayed initial precursor volume of Vs = 5 ml. The increase of the substrate temperature up to 673 K caused the significant improvements in the stoichiometry of ZnO films. The optimal stoichiometry ratio of CZTS films for application in solar cells was obtained at Vs = 3–4 ml. Optical study of ZnO films showed that these films have a high-transmission coefficient values of T = 60–80%. To the best of our knowledge, there is the lack of works devoted to the study of CZT films obtained by spray pyrolysis technique.
Part of the book: Semiconductors