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Novel phosphors, charge carriers and charge blockers for organic light emitting devices.

机译：用于有机发光器件的新型荧光粉，电荷载流子和电荷阻挡剂。

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摘要

The work presented here describes the development of novel phosphors, charge-carriers and charge-blockers for Organic light emitting device (OLED). The first chapter describes how these devices work and how the materials affect device properties. Chapter 2 introduces the development of a series of 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) derivatives as novel charge-blockers. The BCP analogs provide improved thermal stabilities by adding asymmetric substituents to bathophenathroline. The synthetic methods and full characterization of BCP derivatives are reported in this chapter. Chapter 3 describes the research works of utilizing metal complex, i.e. ruthenium bis[poly(pyrazolyl)borate] [Ru(pz3Bpz) 2] as a new hole-transporter. Chapter 4, 5, 6 and 7 provide some insights and guideline of how to design and develop the deep blue Ir and Pt phosphors. As described in chapter 4, the syntheses of Ir complexes with bis(pyrazolyl)borates require the chloride abstraction by CF3SO3Ag before pyrazolyl-borate is added to the reaction solution. Chapter 5 discusses the photophysical properties of Ir complexes with pyrazolyl ligands. Spectroscopic analysis of Ir complexes reveals that the lowest energy excited state (T 1) is a triplet ligand-centered state (3LC) on the cyclometalating ligand admixed with 1MLCT (MLCT = metal-to-ligand charge-transfer) character. The different ancillary ligands alter the 1MLCT state energy mainly by changing the HOMO energy. Destablization of the 1MLCT state results in less 1MLCT character mixed into the T1 state, which in turn leads to an increase in the emission energy. Chapter 6 presents the synthesis and characterization of ( C^E^N)2Ir(LL'), where C^E^Nis a general abbreviation for cyclometalating ligands with a bridging group. The fact of extreme long luminescent lifetime at 77 K for most (C EN)21r(LL') complexes suggests that the spatial overlap between 1MLCT transition and 3LC transition is critical to the photophysical properties of Ir complexes. Chapter 7 describes the investigation of cyclometalated platinum (II) complexes with pyrazolyl ancillary ligands. The ancillary ligands can affect photophysical properties of cyclometalated Pt complexes, e.g. 1MLCT absorption energies, extinction coefficient of T1 transition and radiative decay rate, without changing the emission energies significantly.
机译：此处介绍的工作描述了用于有机发光器件（OLED）的新型磷光体，电荷载流子和电荷阻滞剂的开发。第一章介绍了这些设备的工作方式以及材料如何影响设备的性能。第2章介绍了一系列2,9-二甲基-4,7-二苯基-1,10-菲咯啉（BCP）衍生物作为新型电荷阻滞剂的开发。 BCP类似物通过向铜邻菲咯啉中添加不对称取代基来提高热稳定性。本章介绍了BCP衍生物的合成方法和完整表征。第三章介绍了利用金属配合物即双[聚（吡唑基）硼酸钌] [Ru（pz3Bpz）2]作为新型空穴传输剂的研究工作。第4、5、6和7章提供了有关如何设计和开发深蓝色Ir和Pt磷光体的见识和指南。如第4章所述，Ir配合物与双（吡唑基）硼酸酯的合成需要在将吡唑基-硼酸酯添加至反应溶液之前通过CF3SO3Ag提取氯化物。第5章讨论了具有吡唑基配体的Ir配合物的光物理性质。 Ir配合物的光谱分析表明，最低的能量激发态（T 1）是在具有1MLCT（MLCT =金属对配体的电荷转移）特性的环金属配体上以三重态为中心的配体中心态（3LC）。不同的辅助配体主要通过改变HOMO能量来改变1MLCT状态能量。 1MLCT状态的不稳定化导致更少的1MLCT特性混入T1状态，进而导致发射能量的增加。第6章介绍了（C ^ E ^ N）2Ir（LL'）的合成和表征，其中C ^ E ^ Nis是带有桥基的环金属化配体的一般缩写。大多数（C EN）21r（LL'）配合物在77 K处具有极长的发光寿命这一事实表明1MLCT跃迁和3LC跃迁之间的空间重叠对于Ir配合物的光物理性质至关重要。第7章介绍了与吡唑基辅助配体的环金属化铂（II）配合物的研究。辅助配体可影响环金属化的Pt配合物的光物理性质，例如1MLCT吸收能，T1跃迁的消光系数和辐射衰减率，而不会显着改变发射能。

著录项

  • 作者

    Li, Jian.;

  • 作者单位

    University of Southern California.;

  • 授予单位 University of Southern California.;
  • 学科 Chemistry Inorganic.; Engineering Materials Science.; Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 202 p.
  • 总页数 202
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无机化学;工程材料学;无线电电子学、电信技术;
  • 关键词

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