Novel Squaraines for Enhanced Near Infra-red-active Organic

用于增强近红外活性有机物的新型方酸菁

• 批准号: 1236372
• 负责人: Christopher Collison
• 金额: $ 32.93万
• 依托单位: Rochester Institute of Tech
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1236372&HistoricalAwards=false
• 关键词: Novel; Squaraines; Enhanced; Near; Infra

PI: Collison, ChristopherProposal Number: 1236372Institution: Rochester Institute of TechTitle: Novel Squaraines for Enhanced Near Infra-red-active OrganicOrganic photovoltaic (OPV) solar cells are inexpensive to produce but suffer from low efficiencies, which ultimately prevent their widespread use. Some success has been achieved using polymer based active layers, which absorb strongly in the blue-green region of the solar spectrum. However, a power conversion efficiency (PCE) of 10% must be achieved for commercial viability and incorporation of a near infra-red (NIR) low-band-gap-absorbing dye is necessary to accomplish this goal. Many groups have therefore explored NIR sensitizer addition to their OPVs but many promising low band-gap materials have shown poor PCE or difficulties in processing. A substantial need remains for new materials and new developments in fabrication of NIR-active OPVs.This project investigates novel, solution processable squaraine dyes, targeted specifically for optimal application in NIR bulk heterojunction active layers for tandem OPVs. The work is designed based on a systematic variation of the functional groups on synthesized squaraines and a measure of the associated impact on isolated variables such as solubility, solid state morphology and aggregation, molecular orbital energy levels, interaction strength with fullerene electron acceptors, and excited state lifetime. Functional group substitution will be exploited because of the large number of potential synthetic precursors. Thus, an appropriate solubility and film morphology will be dialed in, beneficial since conductive properties are associated with the order and packing of the molecules in the solid state. Resulting optical absorbance red-shifts and energy level changes will also be explored. The long term goal is to describe how squaraine dyes must be chemically modified to achieve high PCEs for commercial viability. In application-driven research, an empirical approach is commonly used to meet goals for better device performance. However, a strong complementary approach is involved in this work on the prescription for how devices can be improved by fully understanding all contributing variables and mechanisms for efficient operation. To achieve the highest PCEs an interdisciplinary approach will be utilized making use of the team?s ability to i) make, measure and optimize devices, ii) test a complete range of individual properties contributing to device efficiency and iii) synthesize new compounds. The results from this project will help enable more efficient, affordable and sustainable solar cells. Participating students will develop a fundamental confidence and understanding in chemistry, materials science and device engineering that can be universally applied. Research experiences and publication opportunities for graduates and, importantly, a large number of undergraduates will be provided.

PI：Colison，Christopher Proposal编号：1236372机构：罗切斯特理工学院标题：用于增强型近红外活性有机光伏(OPV)太阳能电池的新型方块生产成本低，但效率低，这最终阻止了它们的广泛使用。基于聚合物的有源层在太阳光谱的蓝绿色区域有很强的吸收，已经取得了一些成功。然而，要实现商业可行性，必须达到10%的功率转换效率(PCE)，而加入近红外(NIR)低带隙吸收染料是实现这一目标所必需的。因此，许多小组已经探索了在其OPV中添加近红外增感剂，但许多有希望的低带隙材料表现出较差的PCE或加工困难。在制备近红外活性有机聚合物方面，仍然需要新的材料和新的发展。本项目研究新型的、溶液可加工的方酸染料，目标是在串联有机聚合物的近红外体相异质结有源层中得到最佳应用。这项工作是基于合成方烷上官能团的系统变化以及对孤立变量的相关影响的测量而设计的，这些变量包括溶解度、固体形态和聚集、分子轨道能级、与富勒烯电子受体的相互作用强度和激发态寿命。由于大量潜在的合成前体，官能团取代将被开发。因此，适当的溶解度和薄膜形态将被引入，这是有益的，因为导电性能与分子在固态中的有序性和堆积有关。由此产生的光吸收红移和能级变化也将被探索。长期目标是描述方酸染料必须如何进行化学修饰才能获得高PCE以实现商业可行性。在应用程序驱动的研究中，通常使用经验方法来实现更好的设备性能目标。然而，在这项关于如何通过充分了解所有有助于有效运行的变量和机制来改进设备的处方的工作中，涉及到一种强有力的补充方法。为了实现最高的PCE，将利用跨学科的方法，利用S团队的能力：i)制造、测量和优化器件，ii)测试有助于器件效率的一整套个人性能，以及iii)合成新化合物。该项目的成果将有助于实现更高效、负担得起和可持续的太阳能电池。参与课程的学生将培养对化学、材料科学和设备工程的基本信心和理解，这些都是可以普遍应用的。为毕业生提供研究经验和出版机会，更重要的是，为大量本科生提供研究经验和出版机会。