High performance ultraviolet photodiode based on thin DPPT-TT donor-acceptor organic polymer
Document Type
Article
Publication Date
11-1-2022
Abstract
A high-performance ultraviolet photodetector based on a thin layer DPPT-TT organic material is experimentally demonstrated. The high absorption of DPPT-TT in the ultraviolet band is attributed to the foundation for a high-performance ultraviolet detector. The device's responsivity can be improved by adequately designing the hole-blocking layer HfO2 and the stepped structure at the bottom contact. Due to the self-filtering and optical trapping structure, the device achieves external quantum efficiency above 100%, even with a thin absorption layer (around 50 nm). The maximum spectral responsivity of the device is 383 A/W, and the corresponding maximum specific detection rate is about 2.79 x 10(12) at a bias voltage of 0.5 V. Our results advocate that the thin organic ultraviolet photodetector promises excellent potential in low-cost ultraviolet-visible light detection and imaging applications. Published under an exclusive license by AIP Publishing.
Keywords
LAYER, PHOTODETECTOR, SEMICONDUCTOR
Divisions
photonics
Funders
National Natural Science Foundation of China (NSFC) [52105369],National Natural Science Foundation of China (NSFC) [61974070],National Natural Science Foundation of China (NSFC) [20KJB460008],Natural Science Foundation of Jiangsu Province [BK20190725],NUPTSF [NY220066],Guangdong Province Research and Development in Key Fields from Guangdong Greater Bay Area Institute of Integrated Circuit and System 2021B0101280002,Guangzhou City Research and Development Program in Key Field [20210302001]
Publication Title
Applied Physics Letters
Volume
121
Issue
20
Publisher
AIP Publishing
Publisher Location
1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA