posted on 2024-03-05, 19:39authored byParth
V. Shah, Pratik Pataniya, Narayan N. Som, Vasant Sathe, Sumesh CK
High-performance photodetection is becoming increasingly
important
for the advancement of technology. Very few materials are available
that can respond to light across the ultraviolet to the infrared (IR)
range. These materials are very much required for optoelectronic devices.
Two-dimensional (2D) layered materials became relevant following the
discovery of graphene. Transition-metal chalcogenides belong to the
2D layered material class, as well. The field of optoelectronic applications
makes extensive use of them. The current study investigated the photodetector
device by doping pure SnS nanoflakes with Fe, Mn, Mg, Pd, and W. These
materials were used to create paper-based, flexible, biodegradable
electronics through a solvent-free hand-print technique. The Mg-doped
SnS photodetector has the highest photo response performance among
the devices. With a specific detectivity value of 1.64 × 1010 Jones and a responsivity value of 52 mA W–1, the 7% Mg-doped SnS exhibits the best response among the different
Mg doping. Extensive on–off cycles were used to assess the
switching stability of the device, observing clear photo response
and photoswitching behavior. The photoswitching curves of the device
as created and the device after 8 months show an amazing degree of
consistency, indicating the device’s resilience in open-air
environments. The device was bent repeatedly to test its twisting,
foldability, and flexibility. It continuously displayed a definite
photoswitching trend. Testing in a very basic and acidic environment
verified the device’s chemical stability, and its photo response
and photoswitching functions remain functional. When the paper-based
photodetector’s thermal stability was examined at various temperatures,
the findings demonstrated that the device continues to function normally
and produce photocurrent. Considering how quickly technology is developing
nowadays and how much waste is produced by electronics, switching
to paper-based gadgets could help achieve sustainability goals.