Considerably enhanced exciton emission of CsPbCl3 perovskite quantum dots by the introduction of potassium and lanthanide ions

Nanoscale
Yanan LiuHongwei Song

Abstract

The photoluminescence quantum yield (PLQY) of blue-violet emission of CsPbCl3 quantum dots (QDs) is still low, which has limited their application in multi-colour displays. It is important to search for efficient perovskite phosphors within this wavelength range. In this work, we first considerably enhanced the photoluminescence quantum yield (PLQY) of the CsPbCl3 QDs from 3.2 to 10.3% by the introduction of potassium ions (K+). Then, various lanthanide elements (La, Y, Eu, Lu) were further doped into KxCs1-xPbCl3 QDs. The lanthanide doped KxCs1-xPbCl3 QDs still demonstrated emissions around 408 nm and the PLQY was further improved to 31%. Finally, we carried out anion exchange by gradually substituting chlorine with bromine. Efficient and tunable emissions ranging from 408-495 nm were obtained, with a maximum PLQY of 90%. This work provides a new approach to improve the efficiency of the blue-violet light of perovskite QDs.

References

May 1, 2004·Science·Yadong YinA Paul Alivisatos
Jul 28, 2015·Journal of the American Chemical Society·Quinten A AkkermanLiberato Manna
Feb 3, 2016·Optics Express·Soranyel Gonzalez-CarreroJulia Pérez-Prieto
Feb 24, 2016·Journal of the American Chemical Society·Tom C JellicoeMarcus L Böhm
May 24, 2016·Journal of the American Chemical Society·Dandan ZhangPeidong Yang
Oct 21, 2016·Physical Chemistry Chemical Physics : PCCP·Som SarangSayantani Ghosh
Oct 8, 2016·Chemical Reviews·Gonzalo PrietoFerdi Schüth
Oct 30, 2016·Angewandte Chemie·Meiying LengJiang Tang
Dec 13, 2016·Nanoscale·Leyre GomezTom Gregorkiewicz
Aug 5, 2017·Journal of the American Chemical Society·Michael C BrennanMasaru Kuno
Jan 18, 2018·Journal of the American Chemical Society·Ji-Song YaoShu-Hong Yu

❮ Previous
Next ❯

Citations

Jan 16, 2020·Chemical Society Reviews·Zhichao ZengChunhua Yan
Jan 23, 2020·The Journal of Physical Chemistry Letters·Ke XuJin Zhong Zhang
Mar 7, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Liang ZhaoZhenyu Yang
Aug 31, 2021·The Journal of Physical Chemistry Letters·Shuai ZhangShirong Wang

❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray
transmission electron microscopy

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.