Towards a better understanding of polymer-based light-emitting diodes: A theoretical insight into the basic phenomena

被引:39
作者
Cornil, J
Beljonne, D
dosSantos, DA
Shuai, Z
Bredas, JL
机构
[1] Serv. de Chim. des Mat. Nouveaux, Ctr. Rech. Electron. Photonique M., Université de Mons-Hainaut, B-7000 Mons
关键词
diodes; theoretical study;
D O I
10.1016/0379-6779(96)80141-X
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this contribution, we try to illustrate that quantum-chemistry calculations can prove useful to comprehend better the phenomena occurring in the active layer of polymer-based light-emitting diodes. We review the results of recent theoretical calculations conducted at the correlated level on conjugated oligomers that address several topics of prime interest in the search of new routes towards the achievement of devices with enhanced characteristics. These studies performed on oligomers representative of poly(para-phenylenevinylene) and polythiophene deal with: (i) the modeling of the optical properties of the conjugated polymers involved in the emitting layer; (ii) the investigation of the relative locations of, and relaxation phenomena taking place in, the lowest singlet and triplet excited states; and (iii) the analysis of the effects of derivatization of the conjugated backbone. The theoretical approach we follow allows us to rationalize a wide range of experimental measurements and to provide guidelines in the design of novel attractive materials.
引用
收藏
页码:209 / 217
页数:9
相关论文
共 59 条
  • [1] LIGHT-EMITTING-DIODES FABRICATED WITH CONJUGATED POLYMERS - RECENT PROGRESS
    BAIGENT, DR
    GREENHAM, NC
    GRUNER, J
    MARKS, RN
    FRIEND, RH
    MORATTI, SC
    HOLMES, AB
    [J]. SYNTHETIC METALS, 1994, 67 (1-3) : 3 - 10
  • [2] COMPREHENSIVE INVESTIGATION OF THE SOLUTION PHOTOPHYSICS AND THEORETICAL ASPECTS OF OLIGOTHIOPHENES OF 1-7 RINGS
    BECKER, RS
    DEMELO, JS
    MACANITA, AL
    ELISEI, F
    [J]. PURE AND APPLIED CHEMISTRY, 1995, 67 (01) : 9 - 16
  • [3] THEORETICAL INVESTIGATION OF THE LOWEST SINGLET AND TRIPLET-STATES IN POLY(PARA-PHENYLENE VINYLENE)OLIGOMERS
    BELJONNE, D
    SHUAI, Z
    FRIEND, RH
    BREDAS, JL
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1995, 102 (05) : 2042 - 2049
  • [4] BELJONNE D, UNPUB
  • [5] GREEN ELECTROLUMINESCENCE IN POLY-(3-CYCLOHEXYLTHIOPHENE) LIGHT-EMITTING-DIODES
    BERGGREN, M
    GUSTAFFSON, G
    INGANAS, O
    ANDERSSON, MR
    WENNERSTROM, O
    HJERTBERG, T
    [J]. ADVANCED MATERIALS, 1994, 6 (06) : 488 - 490
  • [6] LIGHT-EMITTING-DIODES WITH VARIABLE COLORS FROM POLYMER BLENDS
    BERGGREN, M
    INGANAS, O
    GUSTAFSSON, G
    RASMUSSON, J
    ANDERSSON, MR
    HJERTBERG, T
    WENNERSTROM, O
    [J]. NATURE, 1994, 372 (6505) : 444 - 446
  • [7] INFRARED CHARACTERIZATION OF ORIENTED POLY(PHENYLENE VINYLENE)
    BRADLEY, DDC
    FRIEND, RH
    LINDENBERGER, H
    ROTH, S
    [J]. POLYMER, 1986, 27 (11) : 1709 - 1713
  • [8] PHOTOLUMINESCENCE AND ELECTROLUMINESCENCE EFFICIENCY IN POLY(DIALKOXY-P-PHENYLENEVINYLENE)
    BRAUN, D
    STARING, EGJ
    DEMANDT, RCJE
    RIKKEN, GLJ
    KESSENER, YARR
    VENHUIZEN, AHJ
    [J]. SYNTHETIC METALS, 1994, 66 (01) : 75 - 79
  • [9] ELECTROLUMINESCENCE FROM LIGHT-EMITTING-DIODES FABRICATED FROM CONDUCTING POLYMERS
    BRAUN, D
    HEEGER, AJ
    [J]. THIN SOLID FILMS, 1992, 216 (01) : 96 - 98
  • [10] INFLUENCE OF DONOR AND ACCEPTOR SUBSTITUENTS ON THE ELECTRONIC CHARACTERISTICS OF POLY(PARA-PHENYLENE VINYLENE) AND POLY(PARA-PHENYLENE)
    BREDAS, JL
    HEEGER, AJ
    [J]. CHEMICAL PHYSICS LETTERS, 1994, 217 (5-6) : 507 - 512