Effect of an External Magnetic Field on the Up-Conversion Photoluminescence of Organic Films: The Role of Disorder in Triplet-Triplet Annihilation

被引：68
作者：
Mezyk, J. [1 ]
Tubino, R.
Monguzzi, A.
Mech, A.
Meinardi, F.
机构：
[1] Univ Milano Bicocca, INFM, CNR, I-20125 Milan, Italy
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 08期
关键词：
MUTUAL ANNIHILATION; MOLECULAR CRYSTALS; EXCITONS;
D O I：
10.1103/PhysRevLett.102.087404
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have investigated the influence of the magnetic field on the triplet-triplet annihilation process in organic films using a model multicomponent system for blue delayed up-conversion photoluminescence. In such a way, we have derived simple analytical expressions to estimate the overall annihilation probability, outlining the peculiar role played by the disorder and demonstrating that the triplet-triplet fusion in solid films is a diffusion limited process.
引用
收藏
页数：4
相关论文
共 18 条
  • [1] Avakian P., 1971, ORGANIC SCINTILLATOR, P499
  • [2] Transient analysis of organic electrophosphorescence. II. Transient analysis of triplet-triplet annihilation
    Baldo, MA
    Adachi, C
    Forrest, SR
    [J]. PHYSICAL REVIEW B, 2000, 62 (16) : 10967 - 10977
  • [3] Two pathways for photon upconversion in model organic compound systems
    Baluschev, S.
    Yakutkin, V.
    Wegner, G.
    Minch, B.
    Miteva, T.
    Nelles, G.
    Yasuda, A.
    [J]. JOURNAL OF APPLIED PHYSICS, 2007, 101 (02)
  • [4] Up-conversion fluorescence: Noncoherent excitation by sunlight
    Baluschev, S.
    Miteva, T.
    Yakutkin, V.
    Nelles, G.
    Yasuda, A.
    Wegner, G.
    [J]. PHYSICAL REVIEW LETTERS, 2006, 97 (14)
  • [5] Magnetoresistance and efficiency measurements of Alq3-based OLEDs
    Desai, Pratik
    Shakya, P.
    Kreouzis, T.
    Gillin, W. P.
    Morley, N. A.
    Gibbs, M. R. J.
    [J]. PHYSICAL REVIEW B, 2007, 75 (09)
  • [6] Influence of an external magnetic field on the singlet and triplet emissions of tris-(8-hydroxyquinoline)aluminum(III) (Alq3) -: art. no. 104507
    Gärditz, C
    Mückl, AG
    Cölle, M
    [J]. JOURNAL OF APPLIED PHYSICS, 2005, 98 (10)
  • [7] Quantum efficiency roll-off at high brightness in fluorescent and phosphorescent organic light emitting diodes
    Giebink, N. C.
    Forrest, S. R.
    [J]. PHYSICAL REVIEW B, 2008, 77 (23)
  • [8] Low power upconversion using MLCT sensitizers
    Islangulov, RR
    Kozlov, DV
    Castellano, FN
    [J]. CHEMICAL COMMUNICATIONS, 2005, (30) : 3776 - 3778
  • [9] EFFECTS OF MAGNETIC FIELDS ON MUTUAL ANNIHILATION OF TRIPLET EXCITIONS IN MOLECULAR CRYSTALS
    JOHNSON, RC
    MERRIFIELD, RE
    AVAKIAN, P
    FLIPPEN, RB
    [J]. PHYSICAL REVIEW LETTERS, 1967, 19 (06) : 285 - +
  • [10] EFFECTS OF MAGNETIC FIELDS ON MUTUAL ANNIHILATION OF TRIPLET EXCITONS IN ANTHRACENE CRYSTALS
    JOHNSON, RC
    MERRIFIE.RE
    [J]. PHYSICAL REVIEW B-SOLID STATE, 1970, 1 (02): : 896 - +
12