Back to Search Start Over

Real-Time Ultraviolet Monitoring System with Low-Temperature Solution-Processed High-Transparent p–n Junction Photodiode with a Fast Responsive and High Rectification Ratio

Authors :
Ha, Hyoun Ji
Kang, Seong Jae
Jeong, Jun Hyung
Ma, Jin Hyun
Park, Min Ho
Kim, Wonsik
Ha, Aelim
Kim, Seunghwan
Park, Soohyung
Kang, Seong Jun
Source :
ACS Applied Materials & Interfaces; July 2024, Vol. 16 Issue: 30 p40139-40148, 10p
Publication Year :
2024

Abstract

We introduce an enhanced performance organic–inorganic hybrid p–n junction photodiode, utilizing poly[bis(4-phenyl) (2,4,6-trimethylphenyl)amine] (PTAA) and ZnO, fabricated through a solution-based process at a low temperature under 100 °C. Improved interfacial electronic structure, characterized by shallower Gaussian standard deviation of the density-of-state distribution and a larger interface dipole, has resulted in a remarkable fold increase of ∼102in signal-to-noise ratio for the device. This photodiode exhibits a high specific detectivity (2.32 × 1011Jones, cm×Hz×W−1) and exceptional rectification ratio (5.47 × 104at ±1 V). The primary light response, concentrated in the optimal thickness of the PTAA layer, contributes to response over the entire UVA region and rapid response speed, with rise and fall times of 0.24 and 0.64 ms, respectively. Furthermore, this work demonstrates immense potential of our device for health monitoring applications by enabling real-time and continuous measurements of UV intensity.

Details

Language :
English
ISSN :
19448244
Volume :
16
Issue :
30
Database :
Supplemental Index
Journal :
ACS Applied Materials & Interfaces
Publication Type :
Periodical
Accession number :
ejs66937647
Full Text :
https://doi.org/10.1021/acsami.4c05494