Open AccessDevelopment and characterization of photodiode from p-Cu2CdSnS4/n-Bi2S3 heterojunction
Author(s) -
M. Suresh Kumar,
Sreejith P. Madhusudanan,
Kallol Mohanta,
Sudip Kumar Batabyal
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab65e1
Subject(s) - photocurrent , heterojunction , photodiode , materials science , optoelectronics , dark current , biasing , substrate (aquarium) , thin film , spin coating , p–n junction , voltage , analytical chemistry (journal) , semiconductor , chemistry , nanotechnology , photodetector , electrical engineering , oceanography , chromatography , geology , engineering
Here we investigated the photo response behaviour of p -Cu 2 CdSnS 4 ( p -CCTS)/ n -Bi 2 S 3 heterojunction photodiode. The solution processed CCTS films without any high temperature sulfurization demonstrated the photo response behaviour, suggesting the material is well suited for low temperature processed photovoltaic applications. A CCTS film was deposited on an ITO coated glass substrate using simple sol-gel based spin coating method. Current–voltage (I–V) characteristic of the p -CCTS/ n -Bi 2 S 3 heterojunction photodiode showed a good rectifying behaviour indicating better junction formation between CCTS and Bi 2 S 3 layers. The obtained photocurrent is 4 times higher than that of the dark current. The I–V curves are asymmetric with respect to voltages and the photocurrent in the positive bias region is considerably higher than the corresponding values in the negative bias region. With these results, it is concluded that the CdS material in traditional thin film PV devices can be replaced with Bi 2 S 3 for better transportation of charge carriers in the PN -junction.