CdS/PbSe Heterojunction Made via Chemical Bath Deposition and Ionic Exchange Processes to Develop Low-Cost and Scalable Devices
Source abstract
Abstract
Complete optoelectronic devices present major difficulties to be built by aqueous chemical deposition. In this work, a ITO/CdS/PbSe heterostructure was developed, depositing CdS over an ITO-coated substrate via a chemical bath deposition (CBD) technique. The next step involved the growth of a plumbonacrite film over CdS via CBD, where the film acted as a precursor film to be converted to PbSe via ion exchange. The characterization of each material involved in the heterostructure were as follows: the CdS thin films presented a hexagonal crystalline structure and bandgap of 2.42 eV; PbSe had a cubic structure and a bandgap of 0.34 eV. I vs. V measurements allowed the observation of the electrical behavior, which showed a change from an ohmic to diode response by applying a thermal annealing at 150 °C for 5 min. The forward bias of the diode response was in the order of 0.8 V, and the current-voltage characteristics were analyzed by using the modified Shockley model, obtaining an ideality factor of 2.47, being similar to a Schottky diode. Therefore, the reported process to synthesize an ITO/CdS/PbSe heterostructure by aqueous chemical methods was successful and could be used to develop optoelectronic devices.
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Research context
OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · ZnO doping and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
P.E. Ingeniería Mecatrónica, Universidad Estatal de Sonora, Av. Ley Federal del Trabajo s/n, Col. Apolo, Hermosillo C.P. 83100, Sonora, Mexico
P.E. Ingeniería Industrial en Manufactura, Universidad Estatal de Sonora, Av. Ley Federal del Trabajo s/n, Col. Apolo, Hermosillo C.P. 83100, Sonora, Mexico
Departamento de Investigación en Física, Universidad de Sonora, Blvr Luis Encinas s/n, Col. Centro, Hermosillo C.P. 83000, Sonora, Mexico
Departamento de Física, Universidad de Sonora, Blvr Luis Encinas s/n, Col. Centro, Hermosillo C.P. 83000, Sonora, Mexico
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