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

Publication Title

Applied Physics Letters

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]

Volume

121

Issue

20

Publisher

AIP Publishing

Publisher Location

1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA

This document is currently not available here.

Share

COinS