Probing the energetics and loss mechanisms in molecular solar cells using luminescnce

利用发光探测分子太阳能电池的能量学和损耗机制

基本信息

批准号：
EP/K030671/1
负责人：
Jenny Nelson
金额：
$ 60.21万
依托单位：
Imperial College London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2013
资助国家：
英国
起止时间：
2013 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FK030671%2F1
关键词：
Probing energetics loss mechanisms molecular

项目摘要

This proposal seeks to establish a unified framework for understanding the - theoretical and practical - limits to efficiency of molecular or nanostructured heterojunction solar cells. The approach is to quantify and optimize the amount of electrical work available per absorbed photon using luminescence based techniques, electrical measurements and modelling. As examples of technologically relevant material systems we will study polymer:fullerene, polymer:nanoparticle and dye sensitized oxide structures, with the aim of describing these different heterojunctions within a single framework. Our approach is to control the energy of the charge separated state at the heterojunction through variations in materials and processes used, detect and measure the energy of that state and compare with the absorbed photon energy and the free enrgy delivered to an external circuit. Particular questions to be addressed concern the effect of the dielectric permittivity of the heterojunction medium (by comparing all organic with hybrid heterojunctions); the effect of microstructure; and the difference in the requirements upon binary and ternary heterojunctions to enable charge separation. A second aim is to improve understanding of luminescence based characterization techniques and find new applications of the techniques. In the context of dispeersed heterojunctions such as polymer:fullerene solar cells, luminescence allows us to study the effect of different recombination mechanisms and compare in particular recombination at the internal polymer:fullerene interface with recombination at the electrodes. This could prove to be a valuable diagnostic method for a range of optoelectronic devices. For example, luminescence applied in-situ to photovoltaic device sduring manufacture can serve as a diagostic tool to indicate the sources of energy loss within the device. We have engaged an indutrial project partner to explore this application.

该提案旨在建立一个统一的框架，以理解分子或纳米结构异质结太阳能电池的效率 - 理论和实用 - 限制。该方法是使用基于发光的技术，电气测量和建模来量化和优化每个吸收光子可用的电气工作量。作为技术相关材料系统的示例，我们将研究聚合物：富勒烯，聚合物：纳米颗粒和染料敏化的氧化物结构，目的是描述单个框架中这些不同的异质结。我们的方法是通过使用，检测和测量该状态的能量的材料和过程的变化来控制异质结处电荷分离状态的能量，并与吸收的光子能量以及传递到外部电路的自由ENRGY进行比较。要解决的特定问题涉及异缝介质的介电介电常数的影响（通过将所有有机物与混合异质界进行比较）；微观结构的影响；以及对二元和三元异质结的要求差异，以实现电荷分离。第二个目的是提高对基于发光的表征技术的理解，并找到技术的新应用。在分散的异质界面（例如聚合物：富勒烯太阳能电池）的背景下，发光使我们能够研究不同的重组机制的效果，并在内部聚合物处特别比较重组：富勒烯界面与电极处的重组。对于一系列光电设备，这可能是一种有价值的诊断方法。例如，将原位的发光应用于光伏设备SDURIN制造可以用作二氧化脉络固定工具，以指示设备内能量损失的来源。我们已经聘请了一个批准项目合作伙伴来探索此应用程序。