Nanocrystalline-CdS thin films grown on flexible PET-substrates by chemical bath deposition

• Published in: Materials research express Vol. 4; no. 7; pp. 75904 - 75911
• Main Authors: Rodríguez-Rosales, K, Quiñones-Galván, J G, Guillén-Cervantes, A, Campos-González, E, Santos-Cruz, J, Mayén-Hernández, S A, Arias-Cerón, J S, de la L Olvera, M, Zelaya-Angel, O, Hernández-Hernández, L A, Contreras-Puente, G, de Moure-Flores, F
• Format: Journal Article
• Language: English
• Published: IOP Publishing 10.07.2017
• Subjects: CdS films; chemical bath deposition; PET substrates; room temperature photoluminescence
• ISSN: 2053-1591; 2053-1591
• DOI: 10.1088/2053-1591/aa7858

CdS thin films were grown on flexible PET and PET/ITO substrates by chemical bath deposition varying the deposition time. The structural analysis indicates that CdS films are composed of nano-crystalline and amorphous material. CdS films grown on PET substrates have hexagonal phase, while those grown on PET/ITO substrates have a cubic phase. The bandgap values of CdS films grown on PET substrates are in the range 2.31-2.45 eV, and the Eg of CdS films grown on PET/ITO substrates are 2.18-2.42 eV. A strong green photoluminescence emission was observed in all the samples, which is associated to near band edge transitions. CdS films grown on PET/ITO substrates have an additional emission at 2.80 eV, which can be attributed to the presence of nano-crystals, in agreement with TEM analyses.