Sökning: "Low temperature PL"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden Low temperature PL.

  1. 1. Photo-physical properties of up-converting NaYF4:Yb-Er,Yb-Mn nanocrystals

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Hongjian Wu; [2022]
    Nyckelord :Appled Physics; Tillämpad fysik;

    Sammanfattning : Rare earth-doped upconversion nanoparticles can emit light with various wavelength from ultraviolet to infrared when excited by near-infrared light. The superior properties including long luminescence lifetime, narrow emission spectra, low toxicity and high chemical stability makes it a promising optical material in bioimaging and other applications. LÄS MER

  3. 2. Properties of III-V/Si heterojunction fabricated by HVPE

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Prakhar Bhargava; [2020]
    Nyckelord :;

    Sammanfattning : Silicon is a promising material and is used for a wide range of applications in the electronics industry because of the high quality surface passivation given by the native oxide layer SiO2e. However, Si is not an ideal candidate for optoelectronic applications due to its indirect bandgap of 1. LÄS MER

  4. 3. Time-Resolved Photoluminescence Studies of InGaP Nanowires for Improving the Internal Quantum Efficiency

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Fasta tillståndets fysik

    Författare :Lert Chayanun; [2017]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Semiconductor Nanowires are promising building blocks for advanced optoelectronic devices since their small diameter give rise to quantization effects. The small diameter also makes them susceptible to non-radiative recombination due to surface states. LÄS MER

  5. 4. Realization of quantum dots emitting at 1.55µm for single photon emitters

    Master-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Författare :Rafaelle Gallo; [2017]
    Nyckelord :;

    Sammanfattning : This thesis reports is about the fabrication and characterization of InAs self-assembled quantum dots (QDs) using both InP and GaAs substrates for the realization of telecommunication-wavelength single-photon sources for quantum communication. The QDs were grown by metal organic vapour phase epitaxy (MOVPE) using the strain-driven Stranski-Krastanov formation mechanism. LÄS MER

  7. 5. Plasmonic Effect of Metal Nanoparticles Deposited on Wide-Band Gap Metal Oxide Nanowire Substrate

    Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Mojtaba Gilzad Kohan; [2017]
    Nyckelord :plasmonic particles; nano wires; wide band gap semiconductors;

    Sammanfattning : The application of nanowires (NWs) in solar cells (SCs) is of great interest due to their new promising aspects established in nanoelectronics. Semiconductors associated with plasmonic metal nanoparticles (NPs) such as Silver (Ag), Gold (Au) and Copper (Cu), show enhanced performance in solid state light absorbing SCs owing to plasmonic characteristic of noble metal NPs. LÄS MER