The Ames Laboratory of the U.S. Department of Energy (DOE) has developed a fully ultraviolet (UV) -based organic light-emitting diode (OLED) that can be used as a wafer-based sensor.

It's a first-of-a-kind research where scientists operate invisible light in special areas, with wavelengths in the ultraviolet range of about 400 nanometers (nm).

Joseph Shinar, Ames lab scientist, said: "What we really want to achieve is to create a spectrometer that can measure the amount of light or luminescence spectra that are absorbed by all luminescent or light-absorbing objects."

Many people have long been interested in OLEDs. Mostly, whether this technology can become a traditional LED replacement technology and LED is widely used in consumer electronic products has little research on OLED and UV spectra. Ruth Shinar, a laboratory scientist, explains: "Because of this, everyone ignored the emerging need for OLEDs for small-sized, flexible device analyzers that can be used to detect food safety , Water quality, medical diagnostics, and other biological sensing. "Such device features include the ability to be handheld, used in a variety of different areas, and cost-effective to throw away."

Researchers snatched their clues to explore the impact of optical micro-cavity, the micro-cavity is the reflection of the surface or the structure of the two interfaces. A tiny resonator changes the wavelength behavior of light. These features allow UVOLED to emit more focused light, which can then be used to detect and excite the spectrum. With this OLED array, different analyzes and photo-excitation can be performed on the same device.

According to the OLED microresonator study conducted by Ames Laboratories, the researchers produced a light that emits light at wavelengths between 370 and 430 nanometers with dark blue and near-ultraviolet light, a fact that continues the results of previous scientists . The graduate student Eeshita Manna experimented with the scientist Rana Biswas excitation spectrum.

The successful development of UVOLED photo-excitation wavelength range with photopolymer

Undertaking a study by Emily Hellerich, a former graduate student in the lab, this time, researchers expanded the range to 470 nanometers by using unique photopolymer materials CBP and PVK. Before further integration of the research on visible OLED array resonators, scientists were able to obtain a wavelength range of 370 nm to 640 nm.

Metal Storage Containers For Food

Nowadays, people's lives can basically meet the requirements of food and clothing, and they are still improving. With the improvement of living standards, people have begun to have a higher pursuit for the quality of life. When purchasing various health care products, it is only reassuring to choose the ones with higher packaging levels. Even the common grains and cereals are more popular if they are properly packaged in iron boxes.

In the past few years, many Chinese people like to pursue foreign imported products, and feel that the quality of domestic enterprises' goods is not at ease. In fact, another reason is that the domestic packaging level is not high in the early days. The gunny bag and cloth bag packaging are more sophisticated than imported products, and it is difficult to enter the high-end consumer market in terms of sales. The use of Iron Box packaging can largely ensure the quality of damaged boxes during transportation. Iron box packaging materials, patterns and colors can be better matched, and the packaging is far more exquisite than other types of packaging, thus increasing the competitiveness of products.

How to design iron box packaging for cereals?

For example, for iron box packaging of cereals and cereals, more traditional ethnic cultures, including Chinese calligraphy, paintings, poems, etc., can be added in the packaging design process, which makes ordinary help more tasteful. The combination of cereals and ethnic elements, which have been essential for people's health since ancient times, is the most suitable. However, if you want to pursue creativity, you need to add something interesting and use some novel patterns to attract consumers' attention.

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