用于Staebler-Wronski效应补偿的多共振银纳米盘图案化薄膜氢化非晶硅太阳电池
Multi-resonant silver nano-disk patterned thin film hydrogenated amorphous silicon solar cells for Staebler-Wronski effect compensation
摘要：
我们研究了偏振无关的改进光捕获在商业薄膜氢化非晶硅（a-Si：H）太阳能光伏电池使用的三维银阵列的多共振纳米盘结构嵌入在氮化硅抗反射涂层（ARC），以提高在本征层（i-a-Si：H）的可见光谱的任何偏振角的光吸收。与参考相比，AM-1.5太阳光谱的i-a-Si：H中吸收的预测总光学增强（OE）为18.51%，并且对于参考电池，短路电流密度（JSC）比11.7mA/cm 2提高19.65%。发现对于任何入射角，纳米盘图案化太阳能电池（NDPSC）中的JSC高于商业参考结构。NDPSC对可见光谱具有多共振光学响应，i-a-Si：H层中OE的相关机制是由表面等离子体共振促进的Fabry-Perot共振的激发。通过在NDPSC中添加额外的OE和通过额外的热生成对缺陷态进行自退火，可以最小化a-Si：H太阳能电池中有害的Staebler-Wronski效应（SWE），从而可能改善a-Si：H太阳能电池的整体稳定特性。
英文摘要：
We study polarization independent improved light trapping in commercial thin film hydrogenated amorphous silicon (a-Si:H) solar photovoltaic cells using a three-dimensional silver array of multi-resonant nano-disk structures embedded in a silicon nitride anti-reflection coating (ARC) to enhance optical absorption in the intrinsic layer (i-a-Si:H) for the visible spectrum for any polarization angle. Predicted total optical enhancement (OE) in absorption in the i-a-Si:H for AM-1.5 solar spectrum is 18.51% as compared to the reference, and producing a 19.65% improvement in short-circuit current density (JSC) over 11.7 mA/cm2 for a reference cell. The JSC in the nano-disk patterned solar cell (NDPSC) was found to be higher than the commercial reference structure for any incident angle. The NDPSC has a multi-resonant optical response for the visible spectrum and the associated mechanism for OE in i-a-Si:H layer is excitation of Fabry-Perot resonance facilitated by surface plasmon resonances. The detrimental Staebler-Wronski effect (SWE) in a-Si:H solar cell can be minimized by the additional OE in the NDPSC and self-annealing of defect states by additional heat generation, thus likely improving the overall stabilized characteristics of a-Si:H solar cells.
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