Laser emission from solutions and films containing semiconducting polymer and titanium dioxide nanocrystals

被引:292
作者
Hide, F [1 ]
Schwartz, BJ [1 ]
DiazGarcia, MA [1 ]
Heeger, AJ [1 ]
机构
[1] UNIV CALIF LOS ANGELES, DEPT CHEM & BIOCHEM, LOS ANGELES, CA 90095 USA
关键词
D O I
10.1016/0009-2614(96)00450-2
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We report laser emission from solutions and dilute blend films containing a semiconducting polymer, poly(2-methoxy,5(2'-ethyl-hexyloxy)-1,4-phenylene-vinylene) (MEH-PPV), and titanium dioxide (TiO2) nanocrystals under pulsed optical excitation at 532 and 435 nm. Thr TiO2 nanoparticles multiply scatter photons in the active polymer medium such that gain exceeds loss above a critical excitation threshold, Above threshold, the emission spectrum narrows significantly. Solid state lasing is observed from free standing films of MEH-PPV and TiO2 in polystyrene. This is the first demonstration of lasing with a semiconducting polymer in the solid slate as the active medium.
引用
收藏
页码:424 / 430
页数:7
相关论文
共 30 条
  • [21] METAL-POLYMER SCHOTTKY BARRIERS ON CAST FILMS OF SOLUBLE POLY(3-ALKYLTHIOPHENES)
    TOMOZAWA, H
    BRAUN, D
    PHILLIPS, S
    HEEGER, AJ
    KROEMER, H
    [J]. SYNTHETIC METALS, 1987, 22 (01) : 63 - 69
  • [22] RANDOM LASER
    WIERSMA, DS
    VANALBADA, MP
    LAGENDIJK, A
    [J]. NATURE, 1995, 373 (6511) : 203 - 204
  • [23] MICROCAVITY EFFECT IN A SINGLE-LAYER POLYMER LIGHT-EMITTING DIODE
    WITTMANN, HF
    GRUNER, J
    FRIEND, RH
    SPENCER, GWC
    MORATTI, SC
    HOLMES, AB
    [J]. ADVANCED MATERIALS, 1995, 7 (06) : 541 - 544
  • [24] INTERCHAIN EXCITATIONS IN CONJUGATED POLYMERS
    YAN, M
    ROTHBERG, LJ
    KWOCK, EW
    MILLER, TM
    [J]. PHYSICAL REVIEW LETTERS, 1995, 75 (10) : 1992 - 1995
  • [25] A NEW ARCHITECTURE FOR POLYMER TRANSISTORS
    YANG, Y
    HEEGER, AJ
    [J]. NATURE, 1994, 372 (6504) : 344 - 346
  • [26] POLYMER PHOTOVOLTAIC CELLS - ENHANCED EFFICIENCIES VIA A NETWORK OF INTERNAL DONOR-ACCEPTOR HETEROJUNCTIONS
    YU, G
    GAO, J
    HUMMELEN, JC
    WUDL, F
    HEEGER, AJ
    [J]. SCIENCE, 1995, 270 (5243) : 1789 - 1791
  • [27] SEMICONDUCTING POLYMER DIODES - LARGE-SIZE, LOW-COST PHOTODETECTORS WITH EXCELLENT VISIBLE-ULTRAVIOLET SENSITIVITY
    YU, G
    PAKBAZ, K
    HEEGER, AJ
    [J]. APPLIED PHYSICS LETTERS, 1994, 64 (25) : 3422 - 3424
  • [28] CHARGE SEPARATION AND PHOTOVOLTAIC CONVERSION IN POLYMER COMPOSITES WITH INTERNAL DONOR-ACCEPTOR HETEROJUNCTIONS
    YU, G
    HEEGER, AJ
    [J]. JOURNAL OF APPLIED PHYSICS, 1995, 78 (07) : 4510 - 4515
  • [29] EFFECT OF RANDOM MULTIPLE LIGHT-SCATTERING ON THE LASER ACTION IN A BINARY-DYE MIXTURE
    ZHANG, W
    CUE, N
    YOO, KM
    [J]. OPTICS LETTERS, 1995, 20 (09) : 1023 - 1025
  • [30] EMISSION LINEWIDTH OF LASER ACTION IN RANDOM GAIN MEDIA
    ZHANG, WL
    CUE, N
    YOO, KM
    [J]. OPTICS LETTERS, 1995, 20 (09) : 961 - 963