4.6 Article

CdS/PbSe Heterojunction Made via Chemical Bath Deposition and Ionic Exchange Processes to Develop Low-Cost and Scalable Devices

Journal

APPLIED SCIENCES-BASEL
Volume 11, Issue 22, Pages -

Publisher

MDPI
DOI: 10.3390/app112210914

Keywords

heterojunction; cadmium sulfide; lead selenide; chemical bath deposition; cost-effective processes; scalability

Ask authors/readers for more resources

The study successfully developed an ITO/CdS/PbSe heterostructure using a chemical bath deposition technique, where CdS was deposited over an ITO-coated substrate and a plumbonacrite film was grown over CdS and converted to PbSe. Electrical behavior was observed through I vs. V measurements and analyzed using the modified Shockley model, showing a diode response with an ideality factor similar to a Schottky diode.
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 & DEG;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.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available