New Tectons for Charge Transfer and Photovoltaics - Single Wall Carbon Nanohorns

用于电荷转移和光伏的新构造——单壁碳纳米角

• 批准号: 53653929
• 负责人: Professor Dr. Dirk M. Guldi
• 金额: --
• 依托单位: Lehrstuhl für Physikalische Chemie I
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/53653929?language=en
• 关键词: New; Tectons; Charge; Transfer; Photovoltaics

The scope of the current proposal is to explore single wall carbon nanohorns (SWNH) as novel nanoscale electron acceptor materials in charge separation and charge transport processes in condensed media and at electrode interfaces. We propose several interlocking approaches involving material synthesis, advanced measurements and characterization methods as well as computational simulations.We see several fundamental advantages relative to the use of single wall carbon nanotubes (SWNT) and other forms of nanocarbons. In particular, SWNH are exclusively semiconducting, are produced in the absence of any catalyst and exhibit high surface areas and porosity. The successful development of organic / organic and inorganic / organic electron donor acceptor nanohybrids using SWNH as acceptor materials is expected to lead to new paradigms in materials design and ultimately to enhanced performance of photovoltaic cells that are light-weight and flexible and thus easily integrated.Our efforts on nanomaterial modification and production – through a modular approach – allows for facile optimization of the desired material, that is, to optimize absorption of the solar spectrum in conjunction with charge injection into SWNH by selection of semiconducting nanocrystal material and surface modification. In this context, we will refine their electronic coupling to SWNH, improve capture efficiency, minimize junction barriers and optimize carrier separation.Based on our initial findings and others efforts in the field, optimization of the electron donor-acceptor interactions by judicious choice of nanomaterials and coupling chemistries should produce functioning charge transfer materials.

当前提案的范围是探索单壁碳纳米角（SWNH）作为新型纳米级电子受体材料，用于凝聚介质和电极界面的电荷分离和电荷传输过程。我们提出了几种相互关联的方法，涉及材料合成、先进的测量和表征方法以及计算模拟。我们看到了相对于使用单壁碳纳米管（SWNT）和其他形式的纳米碳的几个基本优势。特别是，SWNH 完全是半导体，在没有任何催化剂的情况下生产，并表现出高表面积和孔隙率。使用SWNH作为受体材料的有机/有机和无机/有机电子供体受体纳米杂化物的成功开发预计将带来材料设计的新范例，并最终增强轻质、灵活且易于集成的光伏电池的性能。我们在纳米材料改性和生产方面的努力——通过模块化方法——可以轻松优化所需材料，即优化 通过选择半导体纳米晶体材料和表面改性，吸收太阳光谱并结合电荷注入 SWNH。在此背景下，我们将改进它们与SWNH的电子耦合，提高捕获效率，最小化结势垒并优化载流子分离。根据我们的初步发现和该领域的其他努力，通过明智地选择纳米材料和耦合化学物质来优化电子供体-受体相互作用，应该会产生功能性电荷转移材料。