PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

High-brightness green InP-based QLEDs enabled by in-situ passivating core surface with zinc myristate

The light emission of bare InP core is extremely low thanks to a super-reactive surface that oxidizes easily, even under the best conditions. But here's the good news: by tackling these surface imperfections, we can unlock the true potential of InP-based

High-brightness green InP-based QLEDs enabled by in-situ passivating core surface with zinc myristate
2024-04-10
(Press-News.org)

Compared with Cd-based QDs, InP-based QDs have lower photoluminescence quantum yields (PL QYs) and broader full-width at half-maximum (FWHM). In particular, bare InP core has extremely low PL QY (<1%) due to the ease of oxidation of their highly reactive surface even in insert reaction chambers. It has been reported that the defects from oxidative species are probably the reasons for the non-radiative recombination and poor PL QY of these materials. Over the last decade, extensive studies have been conducted to improve the optoelectronic properties of InP-based QDs for display and lighting applications, such as growing shell or adding HF before shell growth. However, HF has serious corrosivity and toxicity, and the rapidly increased pressure when injecting HF at high temperature. Therefore, a safe and easy synthesis strategy is necessary for growing high-quality InP-based QDs.

The Solution: A group of Chinese scientists from Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology proposed a fluoride-free synthesis strategy to in-situ passivate the InP cores, in which zinc myristate reacted with phosphine dangling bonds to form Zn-P protective layer and protect InP cores from the water and oxygen in the environment.

The Result: InP/ZnSe/ZnS core/shell QDs with high PL QY and its corresponding high-brightness green InP-based QLEDs.

-High PL QY and narrow FWHM of InP/ZnSe/ZnS QDs: PL QY=91%, FWHM=44 nm
-High luminance of QLEDs: 175,084 cd m-2
-Long operational lifetime of QLEDs: T50@100 cd m-2 lifetime of more than 20,000 h

The Future: To realize the commercialization of full-color environmentally friendly QLED technology, the performance of green InP-based devices still requires further effort by researchers, such as exploring new synthesis methods of InP QDs, exploring the luminescence mechanism of QLEDs and exploring new structures of QLEDs.

Prof. Fei Chen and Zhenghui Wu mentioned: “With the acceleration of the commercialization of QDs in terms of display and lighting, the performance enhancement of environmentally friendly QDs and corresponding electroluminescent devices has become an urgent task. To realize the commercialization of full-color environmentally friendly QLED technology, the performance of green InP-based devices still requires further effort by researchers. We demonstrated a strategy to in-situ passivate the InP cores, in which zinc myristate reacted with P dangling bonds to form Zn-P protective layer and protect InP cores from the water and oxygen in the environment. This proposed a safe and easy operating route for high-performance green InP-based devices.”

The Impact: These advancements provide a new idea for improving green InP based QDs and corresponding QLEDs, ultimately accelerating the commercialization process of environmentally friendly full color QLEDs without heavy metals.

The research has been recently published in the online edition of Materials Futures, a prominent international journal in the field of interdisciplinary materials science research.

Reference:
Yuanbin Cheng, Qian Li, Mengyuan Chen, Fei Chen, Zhenghui Wu and Huaibin Shen “High-brightness green InP-based QLEDs enabled by in-situ passivating core surface with zinc myristate.”
https://doi.org/10.1088/2752-5724/ad3a83

END


[Attachments] See images for this press release:
High-brightness green InP-based QLEDs enabled by in-situ passivating core surface with zinc myristate

ELSE PRESS RELEASES FROM THIS DATE:

Does the time of day you move your body make a difference to your health?

2024-04-10
Undertaking the majority of daily physical activity in the evening is linked to the greatest health benefits for people living with obesity, according to researchers from the University of Sydney, Australia who followed the trajectory of 30,000 people over almost 8 years. Using wearable device data to categorise participant’s physical activity by morning, afternoon or evening, the researchers uncovered that those who did the majority of their aerobic moderate to vigorous physical activity– the kind that raises our heartrate and gets us out of breath– between 6pm and midnight had the lowest risk of premature ...

How does China’s Agricultural Green Development promote the achievement of the Sustainable Development Goals?

How does China’s Agricultural Green Development promote the achievement of the Sustainable Development Goals?
2024-04-10
Against the backdrop of global challenges such as climate change, diminishing natural resources, and the need to feed a growing population, the imperative for fostering worldwide agricultural sustainability has reached unprecedented levels. China’s Agricultural Green Development (AGD) serves as an important model for global sustainable agricultural development. What advantages does this model offer in terms of concept and implementation path compared to other international sustainable agriculture initiatives? What ...

Call for parents and youth sport coaches to get on the same page

Call for parents and youth sport coaches to get on the same page
2024-04-10
Parents and youth sport coaches need to have positive relationships to foster positive sporting experiences and enable young people to reach their sporting potential – but there’s currently no clear direction about the best way for them to come together.   Flinders University researchers examining youth sport say that developing better coach-parent relationships that create an environment conducive to positive youth sport experiences and outcomes will require a fresh approach and a more interactive perspective.  Improving interactions and communication between parents and coaches needs ...

A microbial plastic factory for high-quality green plastic

A microbial plastic factory for high-quality green plastic
2024-04-10
Engineered bacteria can produce a plastic modifier that makes renewably sourced plastic more processable, more fracture resistant and highly biodegradable even in sea water. The Kobe University development provides a platform for the industrial-scale, tunable production of a material that holds great potential for turning the plastic industry green. Plastic is a hallmark of our civilization. It is a family of highly formable (hence the name), versatile and durable materials, most of which are also persistent in nature and therefore a significant source of pollution. Moreover, many plastics are produced from crude oil, a non-renewable resource. Engineers and researchers ...

Swapping red meat for herring/sardines could save up to 750,000 lives/year in 2050

2024-04-10
Swapping red meat for ‘forage fish’, such as herring, sardines, and anchovies, could save up to 750,000 lives a year in 2050 and significantly reduce the prevalence of disability as a result of diet-related disease, suggests a data analysis published in the open access journal BMJ Global Health.    Adopting this type of diet would be especially helpful for low and middle income countries, where these fish are cheap and plentiful, and where the toll taken by heart disease, in particular, is high, say the researchers. Mounting ...

Job insecurity in early adulthood linked to heightened risk of serious alcohol-related illness in later life

2024-04-10
Experiencing the sort of job insecurity in early adulthood that is often linked to the gig economy, is linked to a heightened risk of a serious alcohol-related illness in later life, suggest the findings of a long term study published online in Occupational & Environmental Medicine.   And men who find themselves in this position as young adults seem to be more at risk than young women, the findings indicate.  The prevalence of ‘precarious employment’, which describes non-standard or temporary work that is often poorly paid, insecure, and unprotected, has increased in recent years, explain the researchers. ...

Xylazine has infiltrated the UK’s illicit drug market

2024-04-10
Xylazine, a powerful animal tranquiliser linked to horrific side effects, is now widespread in the UK illicit drug market. In most cases xylazine is mixed with strong opioids, such as heroin or fentanyl, which is a common combination in the United States. However, xylazine was also detected in the absence of strong opioids alongside stimulant drugs such as cocaine, and found in items sold as counterfeit codeine and diazepam (Valium) tablets and even THC vapes. Researchers warn the wider population of people who use drugs beyond heroin users will ...

Popular diabetes drugs do not increase thyroid cancer risk, study suggests

2024-04-10
Drugs known as GLP-1 analogues have become increasingly popular to treat diabetes and obesity, but there have been concerns that they might increase the risk of thyroid cancer. Now an extensive Scandinavian study led by researchers at Karolinska Institutet has found no evidence of such a link. The study is published in The BMJ. GLP-1 receptor agonists, also known as GLP-1 analogues, reduce blood sugar levels and appetite. They are widely used in the treatment of type 2 diabetes and obesity, with their clinical use steadily increasing. Earlier studies and adverse event data have suggested that these drugs could be associated with an increased risk of thyroid ...

Evidence for puberty blockers and hormone treatment for gender transition wholly inadequate

2024-04-10
The evidence on the use of puberty blockers and hormones for children and young people experiencing gender related distress is wholly inadequate, making it impossible to gauge their effectiveness or their impact on mental and physical health, find two systematic reviews of the available research, published in the Archives of Disease in Childhood. Of the 50 studies included in the review looking at the effectiveness of puberty blockers for gender questioning teens, only one was of high quality, leading the authors to conclude that although most of the studies suggested that treatment might affect bone health and height: “No conclusions can be drawn about the impact ...

The genomic architecture of inherited DNA variants

2024-04-10
You have your mother’s eyes and your father’s smile, but genetics is much more than just what’s on the surface. In a study that spans more than a decade, researchers at Baylor College of Medicine have looked at generations of families in a specific population to reveal the role newly inherited DNA variants play on recessive disease traits, and in the process, they have created a population specific database revealing unique DNA information unseen in larger cohorts. The findings, now published in Genetics in Medicine OPEN, revealed a correlation between occurrences of complex genetic ...

LAST 30 PRESS RELEASES:

Exercise as an anti-ageing intervention to avoid detrimental impact of mental fatigue

UMass Amherst Nursing Professor Emerita honored as ‘Living Legend’

New guidelines aim to improve cystic fibrosis screening

Picky eaters by day, buffet by night: Butterfly, moth diets sync to plant aromas

Pennington Biomedical’s Dr. Leanne Redman honored with the E. V. McCollum Award from the American Society for Nutrition

CCNY physicists uncover electronic interactions mediated via spin waves

Researchers’ 3D-printing formula may transform future of foam

Nurture more important than nature for robotic hand

Drug-delivering aptamers target leukemia stem cells for one-two knockout punch

New study finds that over 95% of sponsored influencer posts on Twitter were not disclosed

New sea grant report helps great lakes fish farmers navigate aquaculture regulations

Strain “trick” improves perovskite solar cells’ efficiency

How GPS helps older drivers stay on the roads

Estrogen and progesterone stimulate the body to make opioids

Dancing with the cells – how acoustically levitating a diamond led to a breakthrough in biotech automation

Machine learning helps construct an evolutionary timeline of bacteria

Cellular regulator of mRNA vaccine revealed... offering new therapeutic options

Animal behavioral diversity at risk in the face of declining biodiversity

Finding their way: GPS ignites independence in older adult drivers

Antibiotic resistance among key bacterial species plateaus over time

‘Some insects are declining but what’s happening to the other 99%?’

Powerful new software platform could reshape biomedical research by making data analysis more accessible

Revealing capillaries and cells in living organs with ultrasound

American College of Physicians awards $260,000 in grants to address equity challenges in obesity care

Researchers from MARE ULisboa discover that the European catfish, an invasive species in Portugal, has a prolonged breeding season, enhancing its invasive potential

Rakesh K. Jain, PhD, FAACR, honored with the 2025 AACR Award for Lifetime Achievement in Cancer Research

Solar cells made of moon dust could power future space exploration

Deporting immigrants may further shrink the health care workforce

Border region emergency medical services in migrant emergency care

Resident physician intentions regarding unionization

[Press-News.org] High-brightness green InP-based QLEDs enabled by in-situ passivating core surface with zinc myristate
The light emission of bare InP core is extremely low thanks to a super-reactive surface that oxidizes easily, even under the best conditions. But here's the good news: by tackling these surface imperfections, we can unlock the true potential of InP-based