Electroluminescence (EL), electrically produced luminescence, is crucial to the operation of many electronic devices that are designed to emit light. EL can theoretically be achieved in devices with a variety of structures and made of different materials. However, to be electroluminescent, these devices need to have a number of core features that allow them to support specific light-emitting materials. These core features have so far limited the range of materials that can be used to build electroluminescent devices. This ultimately prevented the development of devices that can emit light at a wide range of wavelengths.
Researchers at University of California Berkeley (UC Berkeley) have recently realized an electroluminescent device that can emit light from infrared to ultraviolet wavelengths. This new device, presented in a paper published in Nature Electronics, was built using carbon nanotubes (CNTs), large, cylindrical carbon-based structures that are often used to fabricate electronics. To create this structure, the researchers assembled semiconducting CNTs on a 50-nm SiO2/p++ Si substrate using a solution-processing technique. This enabled the formation of a continuous CNT network that can conduct electricity. Compared to previously proposed approaches for creating electroluminescent devices, their design enables the use of a wide variety of light-emitting materials to achieve EL at the device level. In fact, it allows materials to be deposited directly on top of the source contact and is hence not limited by how well a device can process a given material. This results in the production of EL across a broader range of wavelengths.
https://techxplore.com/news/2020-09-device-electroluminescence-infrared-ultraviolet-wavelengths.html
Researchers at University of California Berkeley (UC Berkeley) have recently realized an electroluminescent device that can emit light from infrared to ultraviolet wavelengths. This new device, presented in a paper published in Nature Electronics, was built using carbon nanotubes (CNTs), large, cylindrical carbon-based structures that are often used to fabricate electronics. To create this structure, the researchers assembled semiconducting CNTs on a 50-nm SiO2/p++ Si substrate using a solution-processing technique. This enabled the formation of a continuous CNT network that can conduct electricity. Compared to previously proposed approaches for creating electroluminescent devices, their design enables the use of a wide variety of light-emitting materials to achieve EL at the device level. In fact, it allows materials to be deposited directly on top of the source contact and is hence not limited by how well a device can process a given material. This results in the production of EL across a broader range of wavelengths.
https://techxplore.com/news/2020-09-device-electroluminescence-infrared-ultraviolet-wavelengths.html
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