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Related Experiment Video

Updated: Jan 29, 2026

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes

Published on: November 16, 2018

Optically switchable organic light-emitting transistors.

Lili Hou¹, Xiaoyan Zhang^1,2, Giovanni F Cotella³

¹Université de Strasbourg, CNRS, ISIS, Strasbourg, France.

Nature Nanotechnology

|February 20, 2019

Summary

Researchers developed optically switchable organic light-emitting transistors by combining light-emitting semiconductors and photochromic molecules. This innovation allows reversible tuning of charge transport and light emission for advanced displays and optical memory.

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Area of Science:

Optoelectronics
Organic electronics
Materials science

Background:

Organic light-emitting transistors (OLETs) are crucial for advanced electronics like displays.
Integrating multiple functionalities into single OLET devices is a significant challenge.
Current OLETs lack dynamic, optically controlled modulation of their properties.

Purpose of the Study:

To engineer OLETs with optically switchable functionalities.
To demonstrate simultaneous, reversible control over charge transport and electroluminescence.
To explore applications in high-density optical data storage and advanced displays.

Main Methods:

Fabrication of OLETs using solution-processed films of light-emitting semiconductors and photochromic molecules.
Utilizing specific wavelengths of light to induce reversible changes in the photochromic components.
Characterizing the modulation of charge transport and electroluminescence properties.

Main Results:

Achieved optically switchable OLETs with high on/off ratios (up to 500) for the three primary colors.
Demonstrated simultaneous and reversible tuning of charge transport and electroluminescence.
Enabled mask-free, non-invasive writing and erasing of emission patterns at micrometer scales.

Conclusions:

The developed OLETs offer a novel platform for optically controlled electronic and optoelectronic functions.
This technology holds significant promise for creating highly integrated, full-color displays with dynamic patterning capabilities.
The ability to optically manipulate device characteristics opens avenues for active optical memory applications.