Incorporating photonic layers into polymer solar cells

0933435 Moule该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。摘要在该提案中，PI将确定具有调谐表面等离子体极化子（SPP）频率的纳米颗粒单层是否可以有效地用于增加光吸收，从而提高溶液处理有机光伏器件（OPV）的功率转换效率（PCE）。 拟议的项目有以下四个知识价值组成部分，将分别讨论。1)具有调谐SPP共振的介电/金属核/壳胶体的合成：在合成组件中，将利用从600 nm - 850 nm调谐的SPP能量制造金属纳米颗粒和纳米壳。纳米壳将被制造成具有SiO2核和作为壳层的Au、Ag或Cu。胶体的溶解度和与周围OPV材料的电连接将使用各种共辄表面活性剂来控制。2)在大面积上沉积胶体单层：将使用旋涂技术在大面积上沉积胶体单层。加州大学戴维斯分校先前的研究表明，如果仔细控制浓度、旋转速度、表面张力和表面粘附力，则可以旋涂出轮廓分明的单层。3)胶体膜光学性质的表征和建模：将使用可变角光谱椭圆偏振法（VASE）在各种基底上测量胶体单层的光学性质。该步骤的目的是确定i）被SPP模式吸收的光是热耗散还是通过在OPV材料中引起电子激发而耗散？ii）如果SPP模式引起电子激发，在哪个方向上，在什么距离上，在什么光谱范围内？iii）在这样的层堆叠中，从纳米壳单层反射和透射的光的光谱和强度是什么？iv）OPV层中增加的光场的多大比例可以归因于法向散射，以及什么部分归因于SPP模式？4)结合等离子体波导层的单带隙和多带隙聚合物光伏器件的制造和测试：将制造串联（两个PV层）OPV器件以确定使用光子金属纳米颗粒层是否可以增加光吸收以及增加多少。器件研究的具体目标是使用金属胶体单层来增强在近红外吸收的低带隙OPV材料的吸收。该项目的更广泛影响是培训在光伏技术关键领域接受教育的新专业人员。该项目特别强调支持一名在职母亲的研究生。

0933435MouleThis award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).SummaryIn this proposal, the PIs will determine whether monolayers of nanoparticles with tuned surface plasmon polaron (SPP) frequencies can be effectively used to increase the light absorption and thereby the power conversion efficiency (PCE) of solution processed organic photovoltaic devices (OPV). The proposed project has the following four Intellectual Merits components that will be addressed separately. 1) Synthesis of dielectric/metal core/shell colloids with tuned SPP resonance: In the synthesis component, metal nanoparticles and nano-shells will be fabricated with SPP energies that are tuned from 600 nm - 850 nm. The nano-shells will be fabricated with a SiO2 core and Au, Ag or Cu as the shell layer. The solubility of the colloids and electrical connection to surrounding OPV materials will be controlled using various conjugated surfactants. 2) Deposition of colloid monolayers over large areas: The colloid monolayers will be deposited over large areas using the spin coating technique. Prior UC Davis research has shown that well defined monolayers can be spin coated if the concentration, spinning speed, surface tension and surface adhesion are carefully controlled. 3) Characterization and modeling of colloid film optical properties: The optical properties of the colloid monolayers will be measured using variable angle spectroscopic ellipsometry (VASE) on a variety of substrates. The object of this step is to determine i) Whether light that is absorbed by SPP modes is dissipated thermally or does it dissipate by causing electronic excitation in the OPV materials? ii) If the SPP modes cause electronic excitations, in which direction, over what distance and in what spectral range? iii) What is the spectrum and intensity of light reflected and transmitted from a nano-shell monolayer in such a layer stack? iv) What proportion of the increased optical field in the OPV layers can be attributed to normal scattering and what part to the SPP modes? 4) Fabrication and testing of single and multiple band gap polymer photovoltaic devices incorporating the plasmonic waveguide layers: Tandem (two PV layers) OPV devices will be fabricated to determine if and how much the optical absorption can be increased using layers of photonic metal nanoparticle layers. The specific goal of the device studies is to enhance the absorption of low band gap OPV materials that absorb in the near infrared using the metal colloid monolayers. The broader impacts of this project are in the training of new professionals that are educated in the key area of photovoltaic technology. Special emphasis is placed in this project on supporting a graduate student that is a working mother.