Xi'an research team achieves breakthrough in organic light-emitting transistors

A research team led by academician Huang Wei from the National Key Laboratory of Flexible Electronics at Northwestern Polytechnical University has recently achieved significant breakthroughs in organic light-emitting transistors.

The team developed a new type of device with high efficiency and low power consumption, capable of achieving both horizontal transmission and vertical structure. This advancement has paved the way for new technologies such as large-area flexible screens and low-energy optical communication.

This new type of device combines the light-emitting function of organic light-emitting diodes with the switching control function of field-effect transistors. It has great potential for application in flexible displays and continues to be a major focus of scientific research worldwide.

Huang's team designed a multilayered structure of asymmetric staggered electrodes and developed a special material that enables smooth electron migration and precise control of current and photons. Through this method, the team produced high-performance devices in red, green, and blue colors.

The red device achieved a maximum luminous efficiency of 18.4 percent, the green device reached 21.2 percent, and the blue device achieved 14.4 percent. In terms of brightness, red light can reach up to 16,110 cd/㎡, green light can reach 19,577 cd/㎡, and blue light can reach 4,383 cd/㎡.

The patterned device array developed by the team has an effective display area of over 60 percent and a circuit energy loss of only 5.6 percent, significantly enhancing its practical application value.

This study not only clarifies the key design methods for high-performance devices but also provides strong support for advancing innovative fields such as organic semiconductor lasers and optical communication.