Synergetic effects of acid treatment and localized surface plasmon resonance in PEDOT:PSS layers by doping HAuCl4 for efficient polymer solar cells
Synergetic effects of acid treatment and localized surface plasmon resonance in PEDOT:PSS layers by doping HAuCl4 for efficient polymer solar cells
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DOI：
10.1016/j.orgel.2018.07.026
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发表时间：
2018-11
影响因子：
3.2
通讯作者：
Huangzhong Yu;Zuping Wu;Xinxin Huang;S. Shi;Yanping Li
中科院分区：
文献类型：
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作者：
Huangzhong Yu;Zuping Wu;Xinxin Huang;S. Shi;Yanping Li
采用氯金酸（HAuCl 4）对PEDOT：PSS进行水溶液掺杂改性，通过一系列测试方法研究了HAuCl 4浓度和退火温度对PEDOT：PSS性能的影响。结果表明，HAuCl 4可诱导导电PEDOT和绝缘PSS-之间的相分离，从而导致导电PEDOT链的构象发生变化.此外，与PEDOT：PSS水溶液混合后可以形成Au纳米颗粒（NP），并且随着后退火，Au NP的尺寸分布变得更窄。因此，通过HAuCl 4掺杂和后退火处理，PDOT：PSS的电导率得到了很大的提高。此外，消光光谱和PL光谱表明，在掺杂PEDOT：PSS层中形成的Au纳米粒子也会引起局域表面等离子体共振（LSPR）效应，从而增强聚合物太阳能电池（PSC）的光吸收。基于HAuCl 4掺杂的PEDOT：PSS的冠军PSC已经获得了4.01 ± 0.13%的功率转换效率（PCE），与没有HAuCl 4掺杂的参考器件（2.60 ± 0.05%）相比，其PCE显示出高达54.2%的提高。与没有HAuCl 4掺杂的参考器件（5.88 ± 0.05%）相比，在具有8.05%的高PCE的PTB 7：ICBA BHJ系统中也可以看到改进。因此，这里的结果表明，在HAuCl 4掺杂PEDOT：PSS层中的酸处理和LSPR的协同效应对于PSC是有效的。
In this report, chloroauric acid (HAuCl4) is used to modify PEDOT:PSS by doping in the aqueous solution, and the effects of HAuCl4concentration and annealing temperature on the characteristic of PEDOT:PSS have been investigated by a series of testing methods. The results show that HAuCl4can induce phase segregation between conductive PEDOT and insulated PSS−, which thus leads to the conformation change of the conductive PEDOT chains. Moreover, Au nanoparticles (NPs) can be formed upon mixing with PEDOT:PSS aqueous solution and the distribution of the Au NPs sizes become narrower with post-annealing. Thus, the conductivity of PDOT:PSS can be greatly improved by HAuCl4doping and post-annealing. Moreover, extinction and PL spectra indicate formed Au NPs in doping PEDOT:PSS layer also cause the effect of localized surface plasmon resonance (LSPR), which can enhance the light absorption in the polymer solar cells (PSCs). A champion PSC based on HAuCl4doping PEDOT:PSS has been obtained with power conversion efficiency (PCE) of 4.01 ± 0.13%, which shows up to 54.2% enhancement of the PCE comparing with that of the reference device without HAuCl4doping (2.60 ± 0.05%). The improvement can also be seen at PTB7:ICBA BHJ system with a high PCE of 8.05%, comparing with the reference device without HAuCl4doping (5.88 ± 0.05%). Thus the results here indicate that synergetic effects of acid treatment and LSPR in HAuCl4doping PEDOT:PSS layers are efficient for PSCs.