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Related Concept Videos

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

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A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
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IR Frequency Region: X–H Stretching01:24

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In IR spectroscopy, signals produced by the X−H bonds (such as C−H, O−H, or N−H) can be observed in the frequency range of  2700–4000 cm–1. The C−H stretching vibration forms sharp bands in the region 2850–3000 cm–1. The presence of the O−H stretching vibration leads to the forming of an absorption band in the frequency range 3650–3200 cm−1. At the same time, N−H stretching can be confirmed by absorption bands in...
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Related Experiment Video

Updated: Jan 16, 2026

A Simple and Scalable Fabrication Method for Organic Electronic Devices on Textiles
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A Simple and Scalable Fabrication Method for Organic Electronic Devices on Textiles

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Exciplex-enabled high-efficiency, fully stretchable OLEDs.

Huanyu Zhou1, Hyun-Wook Kim1, Shin Jung Han1

  • 1Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea.

Nature
|January 14, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed highly efficient, stretchable organic light-emitting diodes (OLEDs) using a novel exciplex-assisted phosphorescent layer and MXene electrodes. This breakthrough enables advanced on-skin displays with superior stretchability and performance.

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Area of Science:

  • Optoelectronics
  • Materials Science
  • Organic Electronics

Background:

  • Fully stretchable organic light-emitting diodes (OLEDs) are crucial for on-skin displays but suffer from low efficiency.
  • Existing stretchable materials present limitations for efficient exciton management.

Purpose of the Study:

  • To enhance the efficiency and stretchability of fully stretchable OLEDs.
  • To overcome exciton energy transfer limitations in elastomer matrices for improved device performance.

Main Methods:

  • Incorporation of an intrinsically stretchable exciplex-assisted phosphorescent (ExciPh) layer.
  • Utilizing an elastomer-tolerant triplet-recycling mechanism to mitigate energy transfer losses.
  • Integration of MXene-contact stretchable electrodes (MCSEs) for efficient charge injection.

Main Results:

  • Achieved a light-emitting layer with over 200% stretchability and 21.7% external quantum efficiency (EQE).
  • Developed fully stretchable OLEDs with a record 17.0% EQE and minimal luminescence loss under 60% strain.
  • Demonstrated efficient hole and electron injection using MCSEs with tunable work functions.

Conclusions:

  • The ExciPh layer and MCSEs effectively address efficiency and mechanical challenges in stretchable OLEDs.
  • This approach paves the way for next-generation wearable and deformable displays.
  • High-efficiency, mechanically compliant optoelectronics are now achievable for advanced applications.