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Related Experiment Video

Updated: May 11, 2026

Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System

Luminescence Lifetime Imaging of O₂ with a Frequency-Domain-Based Camera System

Published on: December 16, 2019

Enabling luminescence decay time-based sensing using integrated organic photodiodes.

Martin Sagmeister¹, Andreas Tschepp, Elke Kraker

¹Joanneum Research-Institute for Surface Technologies and Photonics, Franz Pichler Staße 30, 8160, Weiz, Austria. martin.sagmeister@SG3net.org

Analytical and Bioanalytical Chemistry

|May 2, 2013

Summary

Organic photodiodes (OPDs) offer a viable method for measuring oxygen sensor phosphorescent lifetimes. Optimized OPDs with forward bias achieve fast response times for accurate oxygen sensing applications.

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Last Updated: May 11, 2026

Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System

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Published on: December 16, 2019

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

Area of Science:

Optoelectronics
Chemical Sensing
Materials Science

Background:

Optochemical oxygen sensors rely on phosphorescent indicators to measure oxygen levels.
Accurate measurement of phosphorescent lifetimes is crucial for sensor performance.
Traditional photodetectors may have limitations in specific sensor integration scenarios.

Purpose of the Study:

To investigate the use of organic photodiodes (OPDs) for measuring phosphorescent lifetimes in optochemical oxygen sensors.
To develop and characterize a measurement system utilizing OPDs for enhanced oxygen sensing.
To evaluate the performance of OPDs against established methods and detectors.

Main Methods:

Utilized light-emitting diodes for excitation of phosphorescent indicators with lifetimes of 5–60 μs.
Integrated organic photodiodes onto the sensor substrate for photocurrent detection.
Employed adjusted electronic circuitry to measure nanoampere range photocurrents.
Characterized OPD response behavior, applying forward bias to reduce response time.

Main Results:

Determined a modulation cutoff frequency of approximately 100 kHz for OPDs, yielding a response time of 1.6 μs.
Achieved phosphorescent lifetime measurements for two sensor dyes across 0–20% oxygen concentrations.
Demonstrated that OPDs provide results comparable to literature data and inorganic photodetectors.

Conclusions:

Organic photodiodes are suitable for measuring phosphorescent lifetimes in optochemical oxygen sensors.
Forward bias is essential for optimizing OPD response time for phosphorescence decay measurements.
OPDs present a promising alternative for oxygen sensing applications, offering comparable performance to conventional detectors.