Sn-Based Perovskite for Highly Sensitive Photodetectors

Area of Science:

• Materials Science
• Optoelectronics
• Nanotechnology

Background:

• Organic-inorganic hybrid perovskites are promising for photodetectors.
• Lead (Pb) toxicity and lack of internal gain limit current perovskite applications.

Purpose of the Study:

• To develop a high-performance, low-voltage, lead-free photodetector.
• To explore Sn-based perovskites for non-toxic optoelectronic devices.

Main Methods:

• Fabrication of a photodetector using a single layer of lead-free Sn-based perovskite film.
• Characterization of the device's photoresponse, responsivity, gain, and stability.

Main Results:

• Broadband response (UV to NIR) with responsivity up to 10^5 A W^-1.
• High gain achieved at low operating voltage.
• Demonstrated high sensitivity and good bending stability on a flexible substrate.

Conclusions:

• Sn-based perovskites offer a non-toxic, high-performance alternative for photodetectors.
• The developed device exhibits excellent optoelectronic properties and mechanical flexibility.
• This work paves the way for low-cost, high-performance, and environmentally friendly perovskite photodetectors.