Optimising polymer photovoltaic devices through control of phase-separation

通过控制相分离优化聚合物光伏器件

• 批准号: EP/F016255/1
• 负责人: John Macdonald
• 金额: $ 13.07万
• 依托单位: CARDIFF UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2008
• 资助国家: 英国
• 起止时间: 2008 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FF016255%2F1
• 关键词: Optimising; polymer; photovoltaic; devices; through

In principle, photovoltaic devices could meet all our energy requirements in a sustainable way, but at the moment the capital expense of conventional photovoltaics is too great to be competitive, and the volume in which they can be produced is much too small to make a serious dent in our electricity generating needs. Their relatively high manufacturing cost and the difficulty of scaling the manufacturing process is an intrinsic feature of their energy-intensive fabrication process. In contrast, non-conventional PVs based on organic semiconductors can be processed from solution using high-volume roll-to-roll printing technologies, offering the possibility of large area devices being fabricated on flexible substrates at very low cost. Unfortunately at present, organic PV devices are characterized by prohibitively low external power efficiencies (< 6%). Closing the gap in efficiency between organic and inorganic PV devices is a significant challenge / one which will require a full microscopic understanding of the processes that currently limit organic PV efficiency. The most promising organic PV devices are currently based on solution-cast blends of conjugated polymers doped with fullerene derivatives. Relatively little is however known regarding the role of the self-assembled nanoscale morphology of such systems on their operational efficiency. In this proposal, we seek to develop a comprehensive mechanistic understanding of the self-assembly processes by which nanoscale structure arises within such PV applicable materials. In particular we propose to study the evolution of nanoscale phase-separation during film casting using X-ray scattering. We will also utilize a range of complementary microscopy techniques ranging from environmental scanning electron microscopy, to time-resolved near field microscopy. The combination of such techniques will permit us to develop a complete picture of film structure from molecular to microscopic length-scales. Our proposed project draws together some of the UK's leading polymer scientists and technologists, with our goal being to significantly advance the understanding of the processes that limit organic PV device performance.

原则上，光伏设备能够以可持续的方式满足我们所有的能源需求，但目前传统光伏设备的资本支出太大，不具有竞争力，而且它们的生产量太小，无法产生严重的影响。削弱了我们的发电需求。它们相对较高的制造成本和扩大制造工艺的难度是其能源密集型制造工艺的固有特征。相比之下，基于有机半导体的非常规光伏器件可以使用大容量卷对卷印刷技术从溶液中进行加工，从而以非常低的成本在柔性基板上制造大面积器件成为可能。不幸的是，目前有机光伏器件的特点是外部功率效率极低（< 6%）。缩小有机和无机光伏器件之间的效率差距是一项重大挑战，需要对目前限制有机光伏效率的过程有全面的微观了解。目前最有前途的有机光伏器件是基于掺杂富勒烯衍生物的共轭聚合物的溶液浇铸共混物。然而，关于此类系统的自组装纳米级形态对其运行效率的作用知之甚少。在本提案中，我们寻求对自组装过程产生全面的机械理解，通过该过程在此类光伏适用材料中产生纳米级结构。我们特别建议使用 X 射线散射研究薄膜铸造过程中纳米级相分离的演变。我们还将利用一系列补充显微镜技术，从环境扫描电子显微镜到时间分辨近场显微镜。这些技术的结合将使我们能够开发出从分子到微观长度尺度的薄膜结构的完整图像。我们提出的项目汇集了英国一些领先的聚合物科学家和技术专家，我们的目标是显着增进对限制有机光伏器件性能的过程的理解。

项目成果

Dynamics of Crystallization and Disorder during Annealing of P3HT/PCBM Bulk Heterojunctions

P3HT/PCBM 体异质结退火过程中的结晶和无序动力学

• DOI: 10.1021/ma102817z
• 发表时间: 2011-03-16
• 期刊: Macromolecules
• 影响因子: 5.5
• 作者: Samuele Lilliu;T. Agostinelli;E. Pires;M. Hampton;J. Nelson;J. E. MacDonald
• 通讯作者: J. E. MacDonald

Effect of multiple adduct fullerenes on microstructure and phase behavior of P3HT:fullerene blend films for organic solar cells.

多重加合物富勒烯对有机太阳能电池用 P3HT:富勒烯共混薄膜微观结构和相行为的影响。

• DOI: 10.1021/nn204996w
• 发表时间: 2012-05-03
• 期刊: ACS nano
• 影响因子: 17.1
• 作者: Anne A. Y. Guilbert;Luke X. Reynolds;A. Bruno;A. MacLachlan;S. King;M. Faist;E. Pires;J. Emyr Macdonald;N. Stingelin;S. Haque;J. Nelson
• 通讯作者: J. Nelson

Effects of thermal annealing upon the nanomorphology of poly(3-hexylselenophene)-PCBM blends.

热退火对聚（3-己基硒吩）-PCBM 共混物纳米形态的影响。

• DOI: http://dx.10.1002/marc.201100330
• 发表时间: 2011
• 期刊: Macromolecular rapid communications
• 影响因子: 4.6
• 作者: Lilliu S

The role of alkane dithiols in controlling polymer crystallization in small band gap polymer:Fullerene solar cells

烷二硫醇在控制小带隙聚合物中聚合物结晶的作用：富勒烯太阳能电池

• DOI: http://dx.10.1002/polb.22244
• 发表时间: 2011
• 期刊: Polymer Physics
• 作者: Agostinelli T

Dependence of Charge Separation Efficiency on Film Microstructure in Poly(3-hexylthiophene-2,5-diyl):[6,6]-Phenyl-C 61 Butyric Acid Methyl Ester Blend Films

聚(3-己基噻吩-2,5-二基):[6,6]-苯基-C 61 丁酸甲酯共混薄膜中电荷分离效率对薄膜微观结构的依赖性

• DOI: http://dx.10.1021/jz900296f
• 发表时间: 2010
• 期刊: The Journal of Physical Chemistry Letters
• 作者: Keivanidis P