Large enhancement of light-extraction efficiency from optically pumped, nanorod light-emitting diodes

Mei Ling Kuo, Ya Ju Lee, Thomas C. Shen, Shawn Yu Lin

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    We report a threefold enhancement of light-emission intensity at λ=460nm and a 16-fold extractionefficiency enhancement measured from a 2D array of nanorod LEDs. The nano-LEDs are randomly arranged and have a typical rod diameter of 100-250 nm. From a combination of photoluminescence, reflectance, and excitation power-dependence measurements, we show that the enhanced emission is due mainly to modification of the extraction efficiency, and not to that of the internal efficiency. Furthermore, we show that the extraction enhancement originates from the randomness of the 2D array that scatters light efficiently into the air and the smallness of the nanorods that eliminates the guiding modes that trap light.

    Original languageEnglish
    Pages (from-to)2078-2080
    Number of pages3
    JournalOptics Letters
    Volume34
    Issue number13
    DOIs
    Publication statusPublished - 2009 Jul 1

    Fingerprint

    Nanotubes
    nanorods
    light emitting diodes
    Light
    augmentation
    light emission
    rods
    Air
    traps
    reflectance
    photoluminescence
    air
    excitation

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

    Cite this

    Large enhancement of light-extraction efficiency from optically pumped, nanorod light-emitting diodes. / Kuo, Mei Ling; Lee, Ya Ju; Shen, Thomas C.; Lin, Shawn Yu.

    In: Optics Letters, Vol. 34, No. 13, 01.07.2009, p. 2078-2080.

    Research output: Contribution to journalArticle

    Kuo, Mei Ling ; Lee, Ya Ju ; Shen, Thomas C. ; Lin, Shawn Yu. / Large enhancement of light-extraction efficiency from optically pumped, nanorod light-emitting diodes. In: Optics Letters. 2009 ; Vol. 34, No. 13. pp. 2078-2080.
    @article{f6ee977cf24f4dccbdb1dce47330ade4,
    title = "Large enhancement of light-extraction efficiency from optically pumped, nanorod light-emitting diodes",
    abstract = "We report a threefold enhancement of light-emission intensity at λ=460nm and a 16-fold extractionefficiency enhancement measured from a 2D array of nanorod LEDs. The nano-LEDs are randomly arranged and have a typical rod diameter of 100-250 nm. From a combination of photoluminescence, reflectance, and excitation power-dependence measurements, we show that the enhanced emission is due mainly to modification of the extraction efficiency, and not to that of the internal efficiency. Furthermore, we show that the extraction enhancement originates from the randomness of the 2D array that scatters light efficiently into the air and the smallness of the nanorods that eliminates the guiding modes that trap light.",
    author = "Kuo, {Mei Ling} and Lee, {Ya Ju} and Shen, {Thomas C.} and Lin, {Shawn Yu}",
    year = "2009",
    month = "7",
    day = "1",
    doi = "10.1364/OL.34.002078",
    language = "English",
    volume = "34",
    pages = "2078--2080",
    journal = "Optics Letters",
    issn = "0146-9592",
    publisher = "The Optical Society",
    number = "13",

    }

    TY - JOUR

    T1 - Large enhancement of light-extraction efficiency from optically pumped, nanorod light-emitting diodes

    AU - Kuo, Mei Ling

    AU - Lee, Ya Ju

    AU - Shen, Thomas C.

    AU - Lin, Shawn Yu

    PY - 2009/7/1

    Y1 - 2009/7/1

    N2 - We report a threefold enhancement of light-emission intensity at λ=460nm and a 16-fold extractionefficiency enhancement measured from a 2D array of nanorod LEDs. The nano-LEDs are randomly arranged and have a typical rod diameter of 100-250 nm. From a combination of photoluminescence, reflectance, and excitation power-dependence measurements, we show that the enhanced emission is due mainly to modification of the extraction efficiency, and not to that of the internal efficiency. Furthermore, we show that the extraction enhancement originates from the randomness of the 2D array that scatters light efficiently into the air and the smallness of the nanorods that eliminates the guiding modes that trap light.

    AB - We report a threefold enhancement of light-emission intensity at λ=460nm and a 16-fold extractionefficiency enhancement measured from a 2D array of nanorod LEDs. The nano-LEDs are randomly arranged and have a typical rod diameter of 100-250 nm. From a combination of photoluminescence, reflectance, and excitation power-dependence measurements, we show that the enhanced emission is due mainly to modification of the extraction efficiency, and not to that of the internal efficiency. Furthermore, we show that the extraction enhancement originates from the randomness of the 2D array that scatters light efficiently into the air and the smallness of the nanorods that eliminates the guiding modes that trap light.

    UR - http://www.scopus.com/inward/record.url?scp=67650082557&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=67650082557&partnerID=8YFLogxK

    U2 - 10.1364/OL.34.002078

    DO - 10.1364/OL.34.002078

    M3 - Article

    C2 - 19572005

    AN - SCOPUS:67650082557

    VL - 34

    SP - 2078

    EP - 2080

    JO - Optics Letters

    JF - Optics Letters

    SN - 0146-9592

    IS - 13

    ER -