Cds/pbse heterojunction made via chemical bath deposition and ionic exchange processes to develop low-cost and scalable devices

José Antonio Heredia-Cancino*, Oscar Salcido, Ricardo Britto-Hurtado, Sayra Guadalupe Ruvalcaba-Manzo, Ramón Ochoa-Landín, Santos Jesús Castillo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Complete optoelectronic devices present major difficulties that are caused 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 150C 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.

Original languageEnglish
Article number10914
JournalApplied Sciences (Switzerland)
Volume11
Issue number22
DOIs
StatePublished - 1 Nov 2021

Bibliographical note

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

  • Cadmium sulfide
  • Chemical bath deposition
  • Cost-effective processes
  • Heterojunction
  • Lead selenide
  • Scalability

Fingerprint

Dive into the research topics of 'Cds/pbse heterojunction made via chemical bath deposition and ionic exchange processes to develop low-cost and scalable devices'. Together they form a unique fingerprint.

Cite this