Materials World Network: Understanding the Design and Characterization of Air-stable n-Type Charge Transfer Dopants for Organic Electronics

材料世界网络：了解有机电子器件空气稳定 n 型电荷转移掺杂剂的设计和表征

• 批准号: 219968062
• 负责人: Professor Dr. Gianaurelio Cuniberti
• 金额: --
• 依托单位: Professur für Materialwissenschaft und Nanotechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/219968062?language=en
• 关键词: Materials; World; Network; Understanding; Design

Charge transfer doping is crucial in enabling highly efficient organic light emitting diodes and organic solar cells, and is needed for controlling the electrical characteristics of organic field effect transistors. Whereas the development of p-type dopants is well advanced, there is still a lack of effective air-stable solution processabile n-type dopants, due to limited knowledge on the detailed doping mechanisms. To address this gap, this project aims at a) understanding the design rules for air-stable n-dopants based on a promising class of dopants with (1,3-dimethyl-2,3-dihydro- 1H-benzoimidazol-2-yl)phenyl (DMBI) as the model system and b) understanding the detailed doping mechanisms of n-type doping. The three groups involved in the project have a unique combination of complementary expertise. The Bao group will synthesize DMBI dopants with systematically varied energy levels and substituents for better miscibility with the matrix to aid the understanding of doping mechanisms. The chemical process of doping will be investigated with UVvis- NIR and electron paramagnetic resonance. The morphology of doped layers will be studied by atomic force microscopy, various X-ray techniques and nanoSIMS. The Leo group will study the physical mechanisms of doping by impedance spectroscopy, ultraviolet photoelectron spectroscopy, the Seebeck measurement, and modeling of the charge transport characteristic by a master equation model. The air-stability will be tested and the dopants will be used in state-of-the art organic devices such as light emitting diodes, solar cells, or transistors. Finally, the Cuniberti group will study the doping effect on a single molecular level by high resolution scanning tunneling microscopy and will model the doping process by ab initio calculations based on density functional theory.

电荷转移掺杂在实现高效有机发光二极管和有机太阳能电池中是至关重要的，并且是控制有机场效应晶体管的电特性所需要的。尽管p型掺杂剂的开发进展良好，但由于对详细掺杂机制的知识有限，仍然缺乏有效的空气稳定的溶液可加工的n型掺杂剂。为了解决这一差距，该项目旨在a）理解基于具有前景的掺杂剂类别的空气稳定的n型掺杂剂的设计规则，其中（1，3-二甲基-2，3-二氢-1H-苯并咪唑-2-基）苯基（DMBI）作为模型系统，以及B）理解n型掺杂的详细掺杂机制。参与该项目的三个小组具有互补的专业知识的独特组合。Bao组将合成具有系统变化的能级和取代基的DMBI掺杂剂，以更好地与基质相容，以帮助理解掺杂机制。用紫外可见-近红外光谱和电子顺磁共振研究了掺杂的化学过程.掺杂层的形态将通过原子力显微镜、各种X射线技术和nanoSIMS进行研究。Leo小组将通过阻抗谱、紫外光电子能谱、Seebeck测量和通过主方程模型模拟电荷传输特性来研究掺杂的物理机制。空气稳定性将被测试，掺杂剂将用于最先进的有机器件，如发光二极管，太阳能电池或晶体管。最后，Cuniberti小组将通过高分辨率扫描隧道显微镜研究单分子水平上的掺杂效应，并将通过基于密度泛函理论的从头计算模拟掺杂过程。

项目成果

Doped Organic Semiconductors: Trap‐Filling, Impurity Saturation, and Reserve Regimes

掺杂有机半导体：陷阱填充、杂质饱和和储备机制

• DOI: 10.1002/adfm.201404549
• 发表时间: 2015
• 期刊: Advanced Functional Materials
• 影响因子: 19
• 作者: Max L. Tietze;Paul Pahner;Kathleen Schmidt;Karl Leo;Björn Lüssem
• 通讯作者: Björn Lüssem

Influence of organic ligands on the line shape of the Kondo resonance

• DOI: 10.1103/physrevb.93.155118
• 发表时间: 2016-04
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Jörg Meyer;R. Ohmann;Anja Nickel;C. Toher;Roland Gresser;K. Leo;Da. Ryndyk;F. Moresco;G. Cuniberti

Electronically Driven Single-Molecule Switch on Silicon Dangling Bonds

• DOI: 10.1021/acs.jpcc.6b05680
• 发表时间: 2016-12-01
• 期刊: JOURNAL OF PHYSICAL CHEMISTRY C
• 影响因子: 3.7
• 作者: Nickel, Anja;Lehmann, Thomas;Cuniberti, Gianaurelio
• 通讯作者: Cuniberti, Gianaurelio

Passivation of Molecular n‐Doping: Exploring the Limits of Air Stability

• DOI: 10.1002/adfm.201505092
• 发表时间: 2016-06
• 期刊: Advanced Functional Materials
• 影响因子: 19
• 作者: M. Tietze;Bradley D. Rose;M. Schwarze;A. Fischer;Steffen Runge;J. Blochwitz-Nimoth;B. Lüssem;K. Leo;J. Brédas

Quantification of deep hole-trap filling by molecular p-doping: Dependence on the host material purity

• DOI: 10.1016/j.orgel.2013.05.036
• 发表时间: 2013-09-01
• 期刊: ORGANIC ELECTRONICS
• 影响因子: 3.2
• 作者: Tietze, Max L.;Leo, Karl;Luessem, Bjoern
• 通讯作者: Luessem, Bjoern