Monochromator for wavelength-dependent solar cell chracterization

达尔豪西大学有机电子材料和器件组的主要研究领域之一是有机太阳能电池的制造和优化。 我们最近对简单双层异质结器件和线性渐变混合层或“体异质结”器件的研究揭示了连续光照下光伏响应的惊人的时间依赖性。 我们能够通过用三种不同的LED照射设备来识别和理解这种行为的原因-第一种LED的波长仅被两种有机材料中的一种吸收，第二种被两种有机材料吸收，第三种仅被两种有机层中的第二种吸收。 在这种情况下，该方法工作得非常好，但是如果具有窄峰宽的连续可变波长光源（从近UV，在可见光上，并且进入近IR）可用，则该方法将是普遍适用的并且精确得多。因此，我们要求一个单色器，我们将耦合到我们现有的太阳能模拟灯，以提供这样的来源。

One of the primary areas of research in the Organic Electronic Materials and Devices group at Dalhousie University is the fabrication and optimization of organic solar cells.  Our recent studies of both simple bilayer heterojunction devices, and linearly graded mixed layer, or "bulk heterojunction", devices revealed a surprising time dependence of the photovoltaic response under continued illumination.  We were able to identify and understand the cause of this behaviour by illuminating the devices with three different LEDs - the first with a wavelength absorbed by only one of the two organic materials, the second absorbed by both, and a third absorbed by only the second of the two organic layers.  This method worked very well, in this case, but the methodology would be generally applicable and much more accurate if a continuously variable wavelength light source (from the near UV, over the visible, and into the near IR) with a narrow peak width were available. We are therefore requesting a monochromator, which we will couple to our existing solar simulation lamp, to provide such a source.