Insight into the efficiency enhancement of polymer solar cells by incorporating gold nanoparticles
Insight into the efficiency enhancement of polymer solar cells by incorporating gold nanoparticles
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DOI：
10.1016/j.solmat.2012.12.016
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发表时间：
2013-04-01
影响因子：
6.9
通讯作者：
Chen, Hongzheng
中科院分区：
文献类型：
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作者：
Chen, Xiaoqiang;Zuo, Lijian;Chen, Hongzheng
研究了以聚3-己基噻吩：苯基-C61-丁酸甲酯（P3 HT：PCBM）共混物为活性层，聚3，4-乙撑二氧噻吩：聚苯乙烯磺酸盐（PEDOT：PSS）为阳极缓冲层，在氧化铟锡（ITO）玻璃衬底上分别嵌入不同尺寸（20、35、50和75 nm）Au纳米粒子（NPs）的聚合物本体异质结太阳能电池（PSC）的光伏性能。研究了在PEDOT：PSS缓冲层和P3 HT：PCBM有源层界面上不同间距分布的Au纳米颗粒对器件光电性能的影响。我们发现，当Au纳米颗粒足够大以渗透到有源层中时，光学性能得到改善，而具有小Au纳米颗粒的PSC的性能只能受益于提高的空穴收集效率。同时，激子解离效率随着Au纳米颗粒尺寸的增大而显著降低。最后，我们证明了通过掺入35 nm Au NPs，PSC中的最大功率转换效率（PCE）提高了23%。(C)2012 Elsevier B. V.保留所有权利。
Photovoltaic performances of polymer bulk-heterojunction solar cells (PSCs) with various sized (20, 35, 50, and 75 nm) Au nanoparticles (NPs) incorporated on indium tin oxide (ITO)-coated glass substrates are investigated in detail, wherein poly(3-hexylthiophene):phenyl-C61-butyric acid methyl ester (P3HT:PCBM) blend serves as active layer and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as anode buffer layer on ITO. The optical and electrical properties of these devices incorporated with Au NPs with different space distributions in the interface of PEDOT:PSS buffer layer and P3HT:PCBM active layer are investigated. We find that, the optical property is improved as the Au NPs are large enough to penetrate into the active layer, while the performance of PSCs with small Au NPs can only benefit from the improved hole collection efficiency. Meanwhile, the exciton dissociation efficiency reduces remarkably as increasing the size of Au NPs. Finally, we demonstrated a maximum power conversion efficiency (PCE) improvement of similar to 23% in the PSCs by incorporating 35 nm Au NPs. (C) 2012 Elsevier B.V. All rights reserved.