Bauld Reg, Hesari Mahdi, Workentin Mark S, Fanchini Giovanni
Department of Physics and Astronomy, University of Western Ontario, London, Ontario N6A 3K7, Canada.
Nanoscale. 2014 Jul 7;6(13):7570-5. doi: 10.1039/c4nr01821d.
We report for the first time the fabrication of nanocomposite hole-blocking layers consisting of poly-3,4-ethylene-dioxythiophene:poly-styrene-sulfonate (PEDOT:PSS) thin films incorporating networks of gold nanoparticles assembled from Au144(SCH2CH2Ph)60, a molecular gold precursor. These thin films can be prepared reproducibly on indium tin oxide by spinning on it Au144(SCH2CH2Ph)60 solutions in chlorobenzene, annealing the resulting thin film at 400 °C, and subsequently spinning PEDOT:PSS on top. The use of our nanocomposite hole-blocking layers for enhancing the photoconversion efficiency of bulk heterojunction organic solar cells is demonstrated. By varying the concentration of Au144(SCH2CH2Ph)60 in the starting solution and the annealing time, different gold nanostructures were obtained ranging from individual gold nanoparticles (AuNPs) to tessellated networks of gold nanostructures (Tess-AuNPs). Improvement in organic solar cell efficiencies up to 10% relative to a reference cell is demonstrated with Tess-AuNPs embedded in PEDOT:PSS.
我们首次报道了由聚3,4-乙撑二氧噻吩：聚苯乙烯磺酸盐（PEDOT:PSS）薄膜组成的纳米复合空穴阻挡层的制备，该薄膜包含由分子金前驱体Au144(SCH2CH2Ph)60组装而成的金纳米颗粒网络。这些薄膜可以通过在氧化铟锡上旋涂氯苯中的Au144(SCH2CH2Ph)60溶液、在400℃下对所得薄膜进行退火，然后在顶部旋涂PEDOT:PSS来可重复地制备。我们展示了使用我们的纳米复合空穴阻挡层来提高体异质结有机太阳能电池的光转换效率。通过改变起始溶液中Au144(SCH2CH2Ph)60的浓度和退火时间，获得了从单个金纳米颗粒（AuNPs）到金纳米结构的镶嵌网络（Tess-AuNPs）等不同的金纳米结构。将Tess-AuNPs嵌入PEDOT:PSS中，相对于参考电池，有机太阳能电池效率提高了10%。
