SiFi - Singlet Fission photon multiplier film to increase photovoltaic efficiency

SiFi - 单态裂变光子倍增膜，可提高光伏效率

• 批准号: EP/N509929/1
• 负责人: Neil Greenham
• 金额: $ 7.47万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FN509929%2F1
• 关键词: SiFi; Singlet; Fission; photon; multiplier

The SiFi project proposes to demonstrate the technical and commercial feasibility of an application of a recent breakthrough by a team of scientists at Cambridge University: a photon multiplier film employing the principle of singlet fission (SF) in an organic material coupled to an efficient inorganic nano-particle emitter that will increase the efficiency ofphotovoltaic modules either by retrofit of the film onto previously installed modules or by integration of the film into new modules. The photon multiplier film splits high-energy photons (in the uv, blue and green) into 2 lower-energy infrared photons, thus enabling, in principle, a doubling of the photocurrent generated from the high-energy photons. When the photon multiplier film is applied to previously deployed photovoltaic modules it increases the efficiency the modules without adding to the "balance of system" costs such as mechanical mounting, wiring, inverters etc. and is thus a highly effective way of generating more power from the same installed module area. This benefit simultaneously reduces the cost of electricity generated, increases the amount of power generated from renewable sources and so reduces carbon emissions from not having to burn so much fossil fuel and enhances security of electricity supplied, since more is being generated locally and this reduces national energy dependency on imported fuel or electricity. SiFi seeks to demonstrate a significant technical feasibility milestone: a practical photon multiplier film that is able to operate at "photon reakeven" or an external quantum efficiency of 100%. In other words, the film will emit one infra-red photon for every high-energy visible photon absorbed by the film. This is halfway towards the theoretical maximum quantum efficiency of 200%. The team haspreviously reported a breakthrough in the last year in which the first three steps in the four-step process of converting a single high-energy photon into two lower-energy photons were shown to be operating close to maximum efficiency in a model system. The challenge to be tackled in this project is to raise the efficiency of the last step - that is luminescence of infra-red photons from the inorganic nanoparticle in which their energy is held. This technical work is integrated within a broader programme of work in collaboration with Eight19 Ltd, who bring expertise in large-area processing of organic and hybrid films, and in development of new photovoltaic products based on scientific innovation.

SiFi项目旨在证明剑桥大学的一组科学家最近取得的一项突破的技术和商业可行性：一种光子倍增器膜，其采用有机材料中的单重态裂变（SF）原理，与有效的无机纳米材料偶联，粒子发射器，其将通过将膜改装到先前安装的模块上或通过集成来提高光伏模块的效率电影的新模块。光子倍增器膜将高能光子（在紫外线、蓝色和绿色中）分裂成2个较低能量的红外光子，因此原则上能够使从高能光子产生的光电流加倍。当将光子倍增器膜应用于先前部署的光伏模块时，其提高了模块的效率，而不增加诸如机械安装、布线、逆变器等的“系统平衡”成本，并且因此是从相同安装的模块面积产生更多功率的高效方式。这一好处同时降低了发电成本，增加了可再生能源发电量，从而减少了碳排放，因为不必燃烧如此多的化石燃料，并提高了电力供应的安全性，因为更多的电力是在当地生产的，这减少了国家能源对进口燃料或电力的依赖。SiFi旨在展示一个重要的技术可行性里程碑：一种实用的光子倍增器薄膜，能够以“光子reakeven”或100%的外部量子效率运行。换句话说，薄膜每吸收一个高能可见光子，就会发射一个红外光子。这是理论上最大量子效率200%的一半。该团队此前曾在去年报告了一项突破，其中将单个高能光子转换为两个低能光子的四步过程中的前三步被证明在模型系统中接近最大效率。该项目面临的挑战是提高最后一步的效率-即从无机纳米颗粒中发出红外光子的发光，其中能量被保存。这项技术工作与Eight 19有限公司合作纳入了更广泛的工作方案，Eight 19有限公司在有机和混合薄膜的大面积加工以及基于科学创新的新光伏产品开发方面拥有专业知识。

项目成果

Exciton-Phonon Interactions Govern Charge-Transfer-State Dynamics in CdSe/CdTe Two-Dimensional Colloidal Heterostructures.

• DOI: 10.1021/jacs.8b05842
• 发表时间: 2018-10
• 期刊: Journal of the American Chemical Society
• 影响因子: 15
• 作者: Rajal Pandya;Richard Y. S. Chen;Alexandre Cheminal;Marion Dufour;Johannes M. Richter;Tudor H. Thomas;Shuroug Ahmed;A. Sadhanala;Edward P. Booker;G. Divitini;F. Deschler;N. Greenham;S. Ithurria;A. Rao