O'Connor Brendan, Nothern Denis, Pipe Kevin P, Shtein Max
Department of Mechanical Engineering, University of Michigan, Ann Arbor, 48109, USA.
Opt Express. 2010 Sep 13;18 Suppl 3:A432-43. doi: 10.1364/OE.18.00A432.
We propose a novel solar cell architecture consisting of multiple fiber-based photovoltaic (PV) cells. Each PV fiber element is designed to maximize the power conversion efficiency within a narrow band of the incident solar spectrum, while reflecting other spectral components through the use of optical microcavity effects and distributed Bragg reflector (DBR) coatings. Combining PV fibers with complementary absorption and reflection characteristics into volume-filling arrays enables spectrally tuned modules having an effective dispersion element intrinsic to the architecture, resulting in high external quantum efficiency over the incident spectrum. While this new reflective tandem architecture is not limited to one particular material system, here we apply the concept to organic PV (OPV) cells that use a metal-organic-metal-dielectric layer structure, and calculate the expected performance of such arrays. Using realistic material properties for organic absorbers, transport layers, metallic electrodes, and DBR coatings, 17% power conversion efficiency can be reached.
我们提出了一种由多个基于光纤的光伏（PV）电池组成的新型太阳能电池架构。每个光伏光纤元件的设计目的是在入射太阳光谱的窄带内最大化功率转换效率，同时通过利用光学微腔效应和分布式布拉格反射器（DBR）涂层反射其他光谱成分。将具有互补吸收和反射特性的光伏光纤组合成体积填充阵列，可实现具有架构固有有效色散元件的光谱调谐模块，从而在入射光谱上实现高外部量子效率。虽然这种新的反射串联架构不限于一种特定的材料系统，但在此我们将该概念应用于使用金属 - 有机 - 金属 - 电介质层结构的有机光伏（OPV）电池，并计算此类阵列的预期性能。使用有机吸收体、传输层、金属电极和DBR涂层的实际材料特性，可实现17%的功率转换效率。
