Organic electroluminescence from singlet and triplet exciplexes: Exciplex electrophosphorescent diode

被引：46
作者：
Cocchi, M
Virgili, D
Sabatini, C
Kalinowski, J
机构：
[1] Gdansk Tech Univ, Dept Mol Phys, PL-80952 Gdansk, Poland
[2] CNR, Inst Organ Synthesis & Photoreactiv, CNR, ISOF, I-40129 Bologna, Italy
来源：
CHEMICAL PHYSICS LETTERS | 2006年 / 421卷 / 4-6期
关键词：
D O I：
10.1016/j.cplett.2006.01.082
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 have observed emission from singlet and triplet exciplexes in electron donor (D)-acceptor (A) organic electroluminescent systems. The exciplex singlet-to-triplet fraction appears to be a function of electronic properties of the (D-A) complex molecular components and applied electric field. The fluorescence from exciplex singlets could be eliminated using a heavy atom (Gd)-substituted acceptor molecule allowing the efficient intersystem crossing of singlet into triplet exciplex states. By this a pure exciplex electrophosphorescent diode has been realized. These findings are of importance for the understanding of the exciplex formation mechanism and, thus, for material choice in device applications. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：351 / 355
页数：5
相关论文
共 16 条
  • [1] Highly efficient phosphorescent emission from organic electroluminescent devices
    Baldo, MA
    O'Brien, DF
    You, Y
    Shoustikov, A
    Sibley, S
    Thompson, ME
    Forrest, SR
    [J]. NATURE, 1998, 395 (6698) : 151 - 154
  • [2] Transient analysis of organic electrophosphorescence: I. Transient analysis of triplet energy transfer
    Baldo, MA
    Forrest, SR
    [J]. PHYSICAL REVIEW B, 2000, 62 (16) : 10958 - 10966
  • [3] Bu''nau G. v., 1970, RANG DALESPHARMACOLO, V74, P1294, DOI [10.1002/bbpc.19700741223, DOI 10.1002/BBPC.19700741223]
  • [4] Chandrashekharan N., 2002, SPECTRUM-J STATE GOV, V15, P1
  • [5] Efficient exciplex emitting organic electroluminescent devices
    Cocchi, M
    Virgili, D
    Giro, G
    Fattori, V
    Di Marco, P
    Kalinowski, J
    Shirota, Y
    [J]. APPLIED PHYSICS LETTERS, 2002, 80 (13) : 2401 - 2403
  • [6] White light emission from exciplex using tris-(8-hydroxyquinoline)aluminum as chromaticity-tuning layer
    Feng, J
    Li, F
    Gao, WB
    Liu, SY
    Liu, Y
    Wang, Y
    [J]. APPLIED PHYSICS LETTERS, 2001, 78 (25) : 3947 - 3949
  • [7] Magnetic hyperfine modulation of charge photogeneration in solid films of Alq3
    Kalinowski, J
    Szmytkowski, JD
    Stampor, W
    [J]. CHEMICAL PHYSICS LETTERS, 2003, 378 (3-4) : 380 - 387
  • [8] Kalinowski J., 2005, ORGANIC LIGHT EMITTI
  • [9] LI KH, 1990, MOL BIOL PHYS LIVING
  • [10] Exciton regeneration at polymeric semiconductor heterojunctions
    Morteani, AC
    Sreearunothai, P
    Herz, LM
    Friend, RH
    Silva, C
    [J]. PHYSICAL REVIEW LETTERS, 2004, 92 (24) : 247402 - 1
12