Výsledky vyhledávání - "Joaquim P. Leitão"

Akademický článek

CuInSe2 quantum dots grown by molecular beam epitaxy on amorphous SiO2 surfaces

Autor: Henrique Limborço, Pedro M.P. Salomé, Rodrigo Ribeiro-Andrade, Jennifer P. Teixeira, Nicoleta Nicoara, Kamal Abderrafi, Joaquim P. Leitão, Juan C. Gonzalez, Sascha Sadewasser

Publikováno v: Beilstein Journal of Nanotechnology, Vol 10, Iss 1, Pp 1103-1111 (2019)

The currently most efficient polycrystalline solar cells are based on the Cu(In,Ga)Se2 compound as a light absorption layer. However, in view of new concepts of nanostructured solar cells, CuInSe2 nanostructures are of high interest. In this work, we

Externí odkaz: https://doaj.org/article/fee54ed24144489db551bbfe1f141bd8

Zobrazit plný text záznamu

Akademický článek

Substrate and Mg doping effects in GaAs nanowires

Autor: Perumal Kannappan, Nabiha Ben Sedrine, Jennifer P. Teixeira, Maria R. Soares, Bruno P. Falcão, Maria R. Correia, Nestor Cifuentes, Emilson R. Viana, Marcus V. B. Moreira, Geraldo M. Ribeiro, Alfredo G. de Oliveira, Juan C. González, Joaquim P. Leitão

Publikováno v: Beilstein Journal of Nanotechnology, Vol 8, Iss 1, Pp 2126-2138 (2017)

Mg doping of GaAs nanowires has been established as a viable alternative to Be doping in order to achieve p-type electrical conductivity. Although reports on the optical properties are available, few reports exist about the physical properties of int

Externí odkaz: https://doaj.org/article/1a6af22202794e69836407f998d12f62

Zobrazit plný text záznamu

Silicon Nanoparticle Films Infilled with Al2O3 Using Atomic Layer Deposition for Photosensor, Light Emission, and Photovoltaic Applications

Autor: Jennifer P. Teixeira, Hartmut Wiggers, Alexandre M. P. Botas, Rute A. S. Ferreira, Bruno P. Falcão, Joaquim P. Leitão, Rui N. Pereira, Felix Eckmann, Martin Stutzmann, Markus Wiesinger

Publikováno v: ACS Applied Nano Materials. 3:5033-5044

Solution-processed thin films of crystalline silicon nanoparticles (Si NPs) have a great potential for a wide variety of electronic and optoelectronic applications. However, such films are inherent...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3f51688bc825814b572de74e84a33583
https://doi.org/10.1021/acsanm.0c00116

Zobrazit plný text záznamu

Microwave Synthesis of Silver Sulfide and Silver Nanoparticles: Light and Time Influence

Autor: Isabel M.P.L.V.O. Ferreira, Joaquim P. Leitão, William Chiappim, João C. Lima, David Sousa

Publikováno v: ACS Omega
ACS Omega, Vol 5, Iss 22, Pp 12877-12881 (2020)
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP

UIDB/50025/2020 UIDP/50025/2020 UID/CTM/50025/2019 . Silver sulfide (Ag2S) is a low band gap material, which absorbs near-infrared light and is of great importance in areas such as nanotechnology and biomedicine. We report the influence of the starti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6380e8b8e1af9a9b0170e2bd90d41b0
http://europepmc.org/articles/PMC7288597

Zobrazit plný text záznamu

Size-dependent critical transition in the origin of light emission from core–shell Si–SiO2 nanoparticles

Autor: Joana Rodrigues, Lídia Ricardo, Bruno P. Falcão, Joaquim P. Leitão, M.R. Soares, Rodrigo Martins, Rui N. Pereira, Hugo Águas

Publikováno v: Journal of Materials Chemistry C. 8:9012-9023

The origin of the light emission from nanosilicon systems, such as crystalline silicon nanoparticles (Si-NPs), has been an intensively debated issue, with seemingly contradicting literature results pointing to different mechanisms. Here, the origin o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::be70565efdcdd1fe722d6e67c2f9a53b
https://doi.org/10.1039/d0tc01442g

Zobrazit plný text záznamu

Label-free nanoscale ZnO tetrapod-based transducers for tetracycline detection

Autor: Mariana Brás, Julia Zanoni, Bruno P. Falcão, Joaquim P. Leitão, Florinda M. Costa, Teresa Monteiro, Sónia O. Pereira, Joana Rodrigues

Antibiotic pollution of freshwaters and even food products has become an important concern worldwide. Hence, it is of utmost importance to develop cost-effective and reliable devices that can provide information on the presence of such contaminants t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9385a16f6bb978dfb9790bfe863144a0
http://hdl.handle.net/10773/32827

Zobrazit plný text záznamu

A new class of specialty optical fibers based on a novel material composition of the doping host for the study of optical amplification

Autor: Randall E. Youngman, Alexander V. Kir'yanov, Joaquim P. Leitão, José Duarte, Mrinmay Pal, Debjit Dutta, Yuri O. Barmenkov, Mukul Chandra Paul, Anirban Dhar, Ana M. Rocha, Shyamal Das, Mário F. S. Ferreira

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b54246984903156ee8629349d42d611f
https://doi.org/10.1088/978-0-7503-3243-9ch1

Zobrazit plný text záznamu

Mg-Doping of (111)B GaAs Thin Films Grown by Molecular Beam Epitaxy

Autor: G. M. Ribeiro, H. Limborço, Franklin M. Matinaga, A. G. de Oliveira, M. I. N. da Silva, J. C. González, M. V. B. Moreira, Joaquim P. Leitão, O. de Melo, E. R. Viana

Publikováno v: The Journal of Physical Chemistry C. 123:12807-12812

In this work, the influence of the growth conditions in the incorporation of Mg p-type dopant atoms in epitaxial GaAs(100) and (111)B thin films was investigated. Hall effect measurements and photoluminescence spectroscopy were used to investigate th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::40950d8448205ea869fe78d96836b3b2
https://doi.org/10.1021/acs.jpcc.9b01668

Zobrazit plný text záznamu

A morphological and electronic study of ultrathin rear passivated Cu(In,Ga)Se2 solar cells

Autor: Joao Gaspar, Jennifer P. Teixeira, Marika Edoff, José M. V. Cunha, Nina Shariati Nilsson, Sourav Bose, Wei-Chao Chen, Paulo Fernandes, Joaquim P. Leitão, Pedro M. P. Salomé, Jérôme Borme

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Thin Solid Films

The effects of introducing a passivation layer at the rear of ultrathin Copper Indium Gallium di-Selenide Cu(In,Ga)Se2 (CIGS) solar cells is studied. Point contact structures have been created on 25 nm Al2O3 layer using e-beam lithography. Reference

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9c63b81b1c27a1ed113451ea36c7c27
https://doi.org/10.1016/j.tsf.2018.12.028

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání