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Related Experiment Video

Updated: Jul 21, 2026

Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera

Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera

Published on: December 27, 2018

Robust Imaging through Light-Scattering Barriers via Energetically Modulated Multispectral Organic Photodetectors.

Seunghyun Oh¹, Suyeon Jo^1,2, Ji Hyeon Lee³

¹School of Electrical Engineering, Korea University, Seoul, 02841, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)

|April 24, 2025

Summary

Researchers developed a new organic photodetector (OPD) with significantly reduced noise. This breakthrough utilizes a novel electron-blocking layer (EBL) to enhance performance for applications like biomedical imaging and autonomous driving.

Keywords:

electron blocking layers organic photodetectors photonics self‐assembled monolayers

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Last Updated: Jul 21, 2026

Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera

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Published on: December 27, 2018

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Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy

Published on: July 25, 2022

Area of Science:

Organic electronics
Photodetector technology
Materials science

Background:

Emerging technologies require low-noise near-infrared (NIR) photodetectors.
Organic photodetectors (OPDs) offer integration advantages but suffer from high noise.
Commercialization of OPDs is limited by noise constraints.

Purpose of the Study:

To demonstrate a bulk heterojunction (BHJ) NIR OPD with ultralow noise.
To introduce a novel electron-blocking layer (EBL) for noise reduction.
To explore EBL design principles for enhanced OPD performance.

Main Methods:

Synthesis of a new electron-blocking layer (EBL): ((2,7-dicyano-9H-fluorene-9,9-diyl)bis(propane-3,1-diyl))bis(phosphonic acid) (3PAFCN).
Energetic modulative design strategies to optimize interfacial properties and morphology.
Characterization of OPD noise current and specific detectivity.

Main Results:

Achieved an ultralow noise current of 2.18 fA in the BHJ NIR OPD.
Attained a specific detectivity of 2.50 × 10¹⁴ cm Hz^0.5 W^-1 at 808 nm.
Demonstrated exceptional imaging clarity in low-light and foggy conditions.

Conclusions:

The novel 3PAFCN EBL significantly reduces noise in NIR OPDs.
The developed OPDs show great potential for advanced imaging applications.
EBL design principles are broadly applicable to various photoactive materials.