PbTe colloidal nanocrystals: synthesis, characterization, and multiple exciton generation

Journal of the American Chemical Society
James E MurphyArthur J Nozik

Abstract

We report an alternative synthesis and the first optical characterization of colloidal PbTe nanocrystals (NCs). We have synthesized spherical PbTe NCs having a size distribution as low as 7%, ranging in diameter from 2.6 to 8.3 nm, with first exciton transitions tuned from 1009 to 2054 nm. The syntheses of colloidal cubic-like PbSe and PbTe NCs using a PbO "one-pot" approach are also reported. The photoluminescence quantum yield of PbTe spherical NCs was measured to be as high as 52 +/- 2%. We also report the first known observation of efficient multiple exciton generation (MEG) from single photons absorbed in PbTe NCs. Finally, we report calculated longitudinal and transverse Bohr radii for PbS, PbSe, and PbTe NCs to account for electronic band anisotropy. This is followed by a comparison of the differences in the electronic band structure and optical properties of these lead salts.

References

Sep 24, 2004·Journal of the American Chemical Society·Jeffrey M PietrygaJennifer A Hollingsworth
Jan 11, 2005·Nature Materials·Steven A McDonaldEdward H Sargent
May 12, 2005·Nano Letters·Randy J EllingsonAlexander L Efros
Oct 8, 2005·Science·Dmitri V Talapin, Christopher B Murray

❮ Previous
Next ❯

Citations

Jul 27, 2010·Analytical and Bioanalytical Chemistry·Anthony J TavaresUlrich J Krull
Feb 6, 2013·ACS Applied Materials & Interfaces·Chun-Nan ZhuDai-Wen Pang
Mar 6, 2013·Accounts of Chemical Research·Heather M JaegerOleg V Prezhdo
Mar 12, 2010·Journal of the American Chemical Society·Jier HuangTianquan Lian
Oct 8, 2011·Journal of the American Chemical Society·Zewei QuanJiye Fang
Oct 1, 2011·Journal of the American Chemical Society·Ou ChenY Charles Cao
Jan 10, 2012·Journal of the American Chemical Society·Zhuo ChenXingyan Xu
Feb 4, 2012·Journal of the American Chemical Society·Ronald B SorianoMercouri G Kanatzidis
Nov 8, 2012·Journal of the American Chemical Society·Wan Ki BaeJeffrey M Pietryga
Apr 29, 2010·Journal of the American Chemical Society·Maksym V KovalenkoDmitri V Talapin
Apr 7, 2010·Journal of the American Chemical Society·Shiding MiaoAlexander Eychmüller
Jun 28, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Yu ZhangWilliam W Yu
Apr 28, 2011·Nano Letters·Zachary C Holman, Uwe R Kortshagen
Apr 20, 2011·Nano Letters·Gautham NairMoungi G Bawendi
Nov 20, 2013·Nano Letters·M Tuan TrinhXiaoyang Zhu
Oct 11, 2011·ACS Nano·Marcus ScheeleHorst Weller
Sep 7, 2006·Physical Chemistry Chemical Physics : PCCP·Jeffrey J Peterson, Todd D Krauss
Aug 23, 2007·Dalton Transactions : an International Journal of Inorganic Chemistry·C N R RaoA Govindaraj
Jul 10, 2009·Physical Chemistry Chemical Physics : PCCP·Maysaa El HarakehLara I Halaoui
Oct 30, 2009·Physical Chemistry Chemical Physics : PCCP·Marco Califano
Oct 14, 2011·Physical Chemistry Chemical Physics : PCCP·Samantha J O HardmanWendy R Flavell
Apr 6, 2011·Nanoscale·Priscilla D AntunezRichard L Brutchey
Sep 4, 2013·Physical Chemistry Chemical Physics : PCCP·Ali Al-OtaifyDavid J Binks

❮ Previous
Next ❯

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.