| Title |
High dynamic range CsFAPbI3 perovskite photodetectors with 12.7 MHz bandwidth |
| Authors |
Majeed, Abdul Mannan ; Stanionytė, Sandra ; Kreiza, Gediminas ; Ščajev, Patrik |
| DOI |
10.3390/ma19071315 |
| Full Text |
|
| Is Part of |
Materials.. Basel : MDPI. 2026, vol. 19, iss. 7, art. no. 1315, p. 1-14.. eISSN 1996-1944 |
| Keywords [eng] |
bandwidth ; perovskite photodetectors ; responsivity |
| Abstract [eng] |
We develop CsxFA1−xPbI3 perovskite photodetectors with varying Cs content in the x = 0.05–0.25 range to identify the most stable cubic-lattice perovskite composition for visible-light photodetection. The perovskite layers were deposited by the spin-coating technique on a nickel oxide p-type contact and then were covered with C60/Ag electron contact to obtain a vertical pin diode structure. X-ray diffraction (XRD) and scanning electron microscopy (SEM) measurements show that x = 0.1–0.2 provides the most stable lattice and pinhole-free perovskite layers. The photocurrents are linear in an extremely wide 1 nW–10 mW excitation power range, providing photoresponsivity of 0.28 A/W at 532 nm (green light), similar to that of Si photodiodes. The testing of the photodetectors using picosecond pulses provided their rise times and fall times. The x = 0.2 composition provided the shortest rise time values of 27.5 ns, leading to a detector modulation bandwidth of 12.7 MHz. This indicates that this perovskite composition is suitable for replacing silicon photodetectors in cost-efficient light detection systems for imaging and light communication applications such as Li-Fi. |
| Published |
Basel : MDPI |
| Type |
Journal article |
| Language |
English |
| Publication date |
2026 |
| CC license |
|
