Light-Emitting Organic Materials with Variable Charge Injection and Transport Properties
Light-Emitting Organic Materials with Variable Charge Injection and Transport Properties
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DOI：
10.1021/cm0519582
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发表时间：
2006-11
影响因子：
8.6
通讯作者：
A. C. Chen;M. Mǎdǎraş;K. Klubek;J. U. Wallace;S. K. Wei;L. Zeng;and Thomas N. Blanton;Shaw H. Chen-Shaw-H.
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文献类型：
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作者：
A. C. Chen;M. Mǎdǎraş;K. Klubek;J. U. Wallace;S. K. Wei;L. Zeng;and Thomas N. Blanton;Shaw H. Chen-Shaw-H.
新型有机发光材料包括共轭低聚物化学连接通过一个灵活的间隔到电子或空穴传导的核心被设计用于可调的电荷注入和传输性能。代表性的玻璃态各向同性和玻璃态液晶（即，结果表明，它们的玻璃化转变温度和清亮点分别接近140和250 °C，取向有序参数为0.75，光致发光量子产率高达51%;以及HOMO和LUMO能级介于发蓝光的低聚芴和ITO和Mg/SiO2之间。银电极常用于有机发光二极管，OLED。这类材料将有助于平衡电荷注入和传输，并扩展电荷复合区，从而显著提高非极化和极化OLED的器件效率和寿命。
Novel light-emitting organic materials comprising conjugated oligomers chemically attached via a flexible spacer to an electron- or hole-conducting core were designed for tunable charge injection and transport properties. Representative glassy-isotropic and glassy-liquid-crystalline (i.e., noncrystalline solid) materials were synthesized and characterized; they were found to exhibit a glass transition temperature and a clearing point close to 140 and 250 °C, respectively; an orientational order parameter of 0.75; a photoluminescence quantum yield up to 51%; and HOMO and LUMO energy levels intermediate between those of blue-emitting oligofluorenes and the ITO and Mg/Ag electrodes commonly used in organic light-emitting diodes, OLEDs. This class of materials will help to balance charge injection and transport and to spread out the charge recombination zone, thereby significantly improving the device efficiency and lifetime of unpolarized and polarized OLEDs.