Charging discovery opens new class of organic electronic devices

April 14, 2015 // By Paul Buckley
Reseachers from the University of Cologne, Jilin University (China) and the University of Nottingham have developed a method that prolongs the lives of charges by upto 10,000 times longer in organic electronic devices.

Just like living organisms, organic electronics use carbon in complex molecules as their key functional component. These organic electronic devices are less expensive, more environmentally friendly and more recyclable than the older alternativs. Today the most commercially successful organic electronic devices are OLEDs (organic light emitting diodes) found in smart phone displays. Other promising devices include inexpensive solar cells for low-cost and low-carbon electricity generation, and ultra-efficient building lighting which could substantially lower electricity consumption.

Yajun Gao and Professor Paul H.M. van Loosdrecht from the University of Cologne have made progress in this field in collaboration with researchers from Jilin University (China) and the University of Nottingham (UK). The team was able to design an organic electronic device in which charge generated by light lived
approximately 10,000 times longer than was previously thought possible. They did this by designing a small device based on organic molecules in which the built-in
electric field creates a well which traps and protects charge carriers. This opens up the possibility of creating entirely new classes of organic electronic devices,
such as ultra-sensitive photo detectors to image distant stars, or flexible memory elements which could be used in wearable computers. The findings of the research team are described in the article 'Organic Electronics: Engineering Ultra Long Charge Carrier Lifetimes in Organic Electronic Devices at Room Temperature', published in the journal Advanced Material Interfaces.


Yajun Gao, Roderick C. I. MacKenzie, Yang Liu, Bin Xu, Paul H.M. van Loosdrecht and Wenjing Tian, “Organic Electronics: Engineering Ultra Long Charge Carrier Lifetimes in Organic Electronic Devices at Room Temperature”, Advanced Material Interfaces, Volume 2, Issue 4, March 6, 2015

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