Patent ID: 9704924
Date: 2017-07-11
CPC Classifications: H01L

Claim:
1. A light emitting device, comprising: a substrate layer; a first metal layer formed on the substrate layer; a second metal layer formed above the first metal layer; and an organic material layer formed between the first metal layer and the second metal layer and comprising a hole transport material and an electron transport material in contact with one another; wherein an interaction between the hole transport material and the electron transport material generates exciplexes capable of emitting light having a peak wavelength in a first range, and a coupling is generated between the first metal layer and the second metal layer to shift the peak wavelength of the light, a distance between the first metal layer and the second metal layer or a thickness of the first metal layer being adjusted to shift the peak wavelength of the light to a second range or a third range, wherein the thickness of the first metal layer is between 5 and 20 nm, the distance between the first metal layer and the second metal layer is between 75 and 150 nm, the first range is between 376 and 708 nm, the second range is between 570 and 750 nm, and the third range is between 380 and 495 nm, and wherein when the thickness of the first metal layer decreases or the distance between the first metal layer and the second metal layer increases, the peak wavelength of the light is shifted from the first range to the second range, and when the thickness of the first metal layer increases or the distance between the first metal layer and the second metal layer decreases, the peak wavelength of the light is shifted from the first range to the third range, or, wherein the thickness of the first metal layer is between 5 and 20 nm, the distance between the first metal layer and the second metal layer is between 150 and 1000 nm, the first range is between 570 and 750 nm, and the second range is greater than the first range and less than 1240 nm.