Dark Current Reduction Strategy via a Layer-By-Layer Solution Process for a High-Performance All-Polymer Photodetector
Abstract
The ideal bulk-heterojunction for high-performance organic photodetectors prefers a morphology with a vertically gradient component to suppress the leaking current. Here, we demonstrate an all-polymer photodetector with a segregated bulk-heterojunction active layer. This all-polymer photodetector exhibits a dramatically reduced dark current density because of its built-in charge blocking layer, with a responsivity of 0.25 A W–1 at a wavelength of approximately 600 nm and specific detectivity of 5.68 × 1012 cm Hz1/2 W–1 as calculated from the noise spectra at 1 kHz. To our knowledge, this is among the best performances reported for photodetectors based on both polymeric donor and acceptor in the photoactive layer. These findings present a facile approach to improving the specific detectivity of polymer photodetectors via a layer-by-layer solution process- Text
- Journal contribution
- Biophysics
- Medicine
- Cell Biology
- Molecular Biology
- Neuroscience
- Biotechnology
- Cancer
- Space Science
- Biological Sciences not elsewhere classified
- Chemical Sciences not elsewhere classified
- Physical Sciences not elsewhere classified
- approximately 600 nm
- gradient component
- bulk-heterojunction
- photoactive layer
- all-polymer photodetector
- Reduction Strategy
- Layer-By-Layer Solution Process
- a morphology
- noise spectra
- layer-by-layer solution process
- High-Performance All-Polymer Photodetector
- 1 kHz
- detectivity
- polymer photodetectors
- all-polymer photodetector exhibits