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Self-Powered ZnO@PdTe 2 /Si Heterojunction Photodetector with an Ultrafast Response for Color Imaging and Optical Communication.
- Source :
-
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2024 Jul 03; Vol. 16 (26), pp. 33819-33828. Date of Electronic Publication: 2024 Jun 17. - Publication Year :
- 2024
-
Abstract
- Broadband photodetectors have attracted much attention due to their multispectral response properties and show great potential in the fields of optical sensing, multispectral imaging, and optical communications. Palladium telluride (PdTe <subscript>2</subscript> ) is highly competitive in broadband detection due to its tunable bandgap and nonlinear optical properties. However, the low response speed hinders further improvement in the performance of PdTe <subscript>2</subscript> -based broadband photodetectors. In this work, we present island-type ZnO@PdTe <subscript>2</subscript> composites on Si as a heterojunction photodetector exhibiting highly sensitive photodetection capabilities in a wide band from the solar-blind region (254 nm) to the short-infrared (1.55 μm). Due to the island-type morphology of the ZnO@PdTe <subscript>2</subscript> composites effectively enhancing light absorption and the ZnO@PdTe <subscript>2</subscript> /Si stacks forming a type-II heterojunction accelerating carrier separation, the devices have an ultrafast response (1.58/1.34 μs), a detectivity of up to 1.56 × 10 <superscript>13</superscript> Jones, and a sensitivity of up to 10 <superscript>7</superscript> cm <superscript>2</superscript> /W. A triple-channel color imaging system and a dual-channel data transmission system were developed based on the excellent and stable performance of the device. This study demonstrates the great potential of ZnO@PdTe <subscript>2</subscript> /Si vertical heterojunction photodetectors for high-speed, wide-band, multiscenario optical communication.
Details
- Language :
- English
- ISSN :
- 1944-8252
- Volume :
- 16
- Issue :
- 26
- Database :
- MEDLINE
- Journal :
- ACS applied materials & interfaces
- Publication Type :
- Academic Journal
- Accession number :
- 38885614
- Full Text :
- https://doi.org/10.1021/acsami.4c06233