The Evolution of Organometallic Complexes in Organic Light-Emitting Devices
The Evolution of Organometallic Complexes in Organic Light-Emitting Devices
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DOI：
10.1557/mrs2007.144
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发表时间：
2007-09
期刊：
影响因子：
5
通讯作者：
M. Thompson
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文献类型：
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作者：
M. Thompson
本文是2006年11月28日在波士顿举行的材料研究学会秋季会议上由Mark Thompson（南加州大学）发表的MRS奖章演讲的编辑记录。汤普森因“开发高效重金属磷光体复合物”而获得奖章。MRS奖章旨在表彰一项特定的杰出发现或进展，预计将对任何材料相关领域的进展产生重大影响。成功的研究工作已经使有机发光器件（OLED）的内部效率从25%提高到100%。OLED中的电致发光过程涉及以1：3的比例形成的单线态激子和三线态激子。存在通过开发其中除了单重态激子之外还可以有效地使用三重态激子的化合物来改善自旋统计的驱动力。将重金属基磷光体结合到OLED中的成功（其中金属原子的强自旋轨道耦合允许来自三重态激子的有效分子磷光）导致鉴定和合成内效率为100%的铱络合物fac -三苯基吡啶铱。这反过来又导致了100多种铱和铂基化合物的合成，这些化合物已成为迄今为止发现的最有效的发光化合物。汤普森在这一领域的研究知识产权已经导致了50多项美国专利和大量的商业应用和设备的创业投资。
This article is an edited transcript of the MRS Medal presentation given by Mark Thompson (University of Southern California) on November 28, 2006, at the Materials Research Society Fall Meeting in Boston. Thompson was awarded the Medal for the “development of highly efficient heavy-metal phosphor complexes.” The MRS Medal recognizes a specific outstanding recent discovery or advancement which is expected to have a major impact on the progress of any materials-related field. Successful research efforts have led to improvements in the internal efficiencies of organic light-emitting devices (OLEDs) from 25% to 100%. The electroluminescence process in OLEDs involves the formation of both singlet and triplet excitons, formed in a ratio of 1:3. There is a drive to improve spin statistics by developing compounds in which triplet excitons, in addition to singlet excitons, can be used efficiently. Success with the incorporation of heavy-metal–based phosphors into OLEDs, in which the strong spin-orbit coupling of the metal atom allows for efficient molecular phosphorescence from triplet excitons, resulted in the identification and synthesis of an iridium complex, fac -tris-phenylpyridine iridium, with internal efficiencies of 100%. This, in turn, has led to the synthesis of more than 100 iridium- and platinum-based compounds, which have become the most efficient light-emitting compounds yet discovered. Intellectual property from Thompson’s research in this field has led to more than 50 U.S. patents and substantial entrepreneurial investment toward commercial applications and devices.