PEIE doped ZnO as a tunable cathode interlayer for efficient polymer solar cells
PEIE doped ZnO as a tunable cathode interlayer for efficient polymer solar cells
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PEIE 掺杂 ZnO 作为高效聚合物太阳能电池的可调阴极中间层
DOI：
10.1016/j.apsusc.2018.11.166
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发表时间：
2019-03-15
影响因子：
6.7
通讯作者：
Huang，Chengwen
中科院分区：
文献类型：
--
作者：
Yu，Huangzhong;Huang，Xinxin;Huang，Chengwen
在这项研究中，新的纳米复合材料的氧化锌（ZnO）和聚合物聚乙烯亚胺乙氧基化（PEIE）组成的溶胶-凝胶ZnO分散体与不同浓度的PEIE在溶液中共混。采用一系列测试方法对ZnO：PEIE复合材料的光电性能进行了表征。结果表明，PEIE作为掺杂剂可以有效地对ZnO纳米粒子进行表面修饰和钝化，当PEIE含量为0.1wt%时，ZnO：PEIE复合材料的电导率最高，功函数最低。此外，ZnO和ZnO：PEIE复合材料与不同浓度的PEIE被用来作为电子传输层（ETL）的聚合物太阳能电池（PSC）。与纯ZnO作为ETL相比，基于P3 HT：PCBM的具有ZnO：PEIE（0.1wt%PEIE）作为ETL的器件的功率转换效率（PCE）从3.01%有效地提高到3.52%。对于基于PTB 7：PCBM的器件，其中ZnO：PEIE（0.1重量% PEIE）作为ETL，PCE从6.92%提高到8.03%。结果表明，PEIE不仅可以减少ZnO纳米粒子的表面缺陷和陷阱，而且可以防止ZnO前驱体的团聚。而且，PEIE的加入并没有改变合成纳米ZnO材料的形貌，ZnO薄膜的费米能级也随着PEIE的加入而逐渐降低，有助于降低电子传输势垒。因此，ZnO：PEIE复合材料可以是PSC中的有效ETL。
In this study, novel nanocomposites consisting of zinc oxide (ZnO) and a polymer polyethylenimine ethoxylated (PEIE) are fabricated by blending sol–gel ZnO dispersions with different concentrations of PEIE in solution. The photoelectric properties of ZnO:PEIE composites are characterized by a series of testing methods. The results show that PEIE as a doping agent can effectively modify and passivate the surface of ZnO nanoparticles, and ZnO:PEIE composite at 0.1 wt% PEIE possesses the highest conductivity and the lowest work function. Moreover, the ZnO and ZnO:PEIE composites with different concentrations of PEIE are used as electron transport layers (ETLs) in polymer solar cells (PSCs). Compared to pure ZnO as ETL, the power conversion efficiency (PCE) of the device based on P3HT:PCBM with ZnO:PEIE (0.1 wt% PEIE) as ETL is effectively improved from 3.01% to 3.52%. For the device based on PTB7:PCBM with ZnO:PEIE (0.1 wt% PEIE) as ETL, the PCE is improved from 6.92% to 8.03%. It is found that PEIE can not only reduce the surface defects and traps of ZnO nanoparticles, but also prevent the aggregation of ZnO precursor. Moreover, the addition of PEIE does not change the shape of synthetic nanometer ZnO materials, and the Fermi level of ZnO thin films is also gradually decreased with the addition of PEIE, which helps to reduce the electronic transmission barrier. Accordingly, ZnO:PEIE composites can be effective ETLs in PSCs.