有机太阳能电池的光管理技术
Optical Management Techniques for Organic Solar Cells
摘要：
在本论文中，探讨了两种不同的有机太阳能电池的光管理技术。第一部分是重点发展的一个纹理后反射器的光学潜水器。纹理化反射器（TR）的使用促进了光路长度的增加以及有源层内的光捕获。TR是通过一个相对简单的技术，通过沉积金属薄膜上的微透镜阵列（MLA）。氧化锌纳米颗粒用于最小化遮蔽效应。使用TR，对于基于聚合物的有机太阳能电池，短路电流密度和功率转换效率的增强被证明高达10-25%。第二部分侧重于提高将司法协助纳入口服脊髓灰质炎疫苗的有效性。使用MLA实现的路径长度的增加可以通过增加MLA的折射率和将MLA直接结合在透明电极而不是玻璃基板上来改善。这种方法可以避免在MLA和玻璃衬底之间的界面处发生的光学损耗，并增加光在有源层内的净路径长度。初步的实验结果进行了讨论，以了解这种方法的潜力。通过在无ITO器件中的透明电极上直接使用MLA，实现了短路电流密度的约15%的增强。
英文摘要：
In this thesis, two different optical management techniques for organics based solar cells are explored. The first part is focused on the development of a textured rear reflector for OPVs. The use of textured reflector (TR) facilitates an increase in the optical path length along with light trapping within the active layer. TR was fabricated through a relatively simpler technique by depositing metal films over a microlens array (MLA). Zinc oxide nanoparticles were used to minimize the shadowing effect. Using TR, enhancements in short-circuit current density and power conversion efficiencies up to 10-25% were demonstrated for a polymer based organic solar cell. The second part is focused on improving the effectiveness of MLA incorporation in OPVs. The increase in path length achieved using MLA can be improved by increasing the refractive index of MLA and incorporating MLA directly on the transparent electrode instead of glass substrate. This approach could avoid the optical losses occurring at the interface between MLA and glass substrate and increase the net path length of light within the active layer. Initial experimental results are discussed to understand the potential of this approach. Approximately, ~15% enhancement in short-circuit current density was achieved by using MLA directly on the transparent electrode in ITO-free devices.
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