Wang Jiantai, Zhang Jun, Meng Bin, Zhang Baohua, Xie Zhiyuan, Wang Lixiang
†State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.
‡University of Chinese Academy of Sciences, Beijing 100039, P. R. China.
ACS Appl Mater Interfaces. 2015 Jun 24;7(24):13590-6. doi: 10.1021/acsami.5b02997. Epub 2015 Jun 10.
We proposed a facile and green one-pot strategy to synthesize Mo bronzes nanoparticles to serve as an efficient hole extraction layer in polymer solar cells. Mo bronzes were obtained through reducing the fractional self-aggregated ammonium heptamolybdate with appropriate reducing agent ascorbic acid, and its optoelectronic properties were fully characterized. The synthesized Mo bronzes displayed strong n-type semiconductor characteristics with a work function of 5.2-5.4 eV, matched well with the energy levels of current donor polymers. The presented gap states of the Mo bronzes near the Fermi level were beneficial for facilitating charge extraction. The as-synthesized Mo bronzes were used as hole extraction layer in polymer solar cells and significantly enhanced the photovoltaic performance and stability. The power conversion efficiency was increased by more than 18% compared with the polyethylene dioxythiophene:polystyrenesulfonate-based reference cell. The excellent performance and facile preparation render the as-synthesized solution-processed Mo bronzes nanoparticles a promising candidate for hole extraction layer in low-cost and efficient polymer solar cells.
我们提出了一种简便、绿色的一锅法策略来合成钼青铜纳米颗粒，用作聚合物太阳能电池中的高效空穴提取层。通过用适当的还原剂抗坏血酸还原部分自聚集的七钼酸铵来获得钼青铜，并对其光电性能进行了全面表征。合成的钼青铜表现出强n型半导体特性，功函数为5.2 - 5.4 eV，与当前供体聚合物的能级匹配良好。钼青铜在费米能级附近呈现的能隙态有利于促进电荷提取。合成的钼青铜用作聚合物太阳能电池中的空穴提取层，显著提高了光伏性能和稳定性。与基于聚（3,4 - 乙撑二氧噻吩）：聚苯乙烯磺酸盐的参考电池相比，功率转换效率提高了18%以上。优异的性能和简便的制备方法使合成的溶液法钼青铜纳米颗粒成为低成本、高效聚合物太阳能电池中空穴提取层的有前途的候选材料。
