Safari Zeinab, Zarandi Mahmood Borhani, Giuri Antonella, Bisconti Francesco, Carallo Sonia, Listorti Andrea, Esposito Corcione Carola, Nateghi Mohamad Reza, Rizzo Aurora, Colella Silvia
Department of Physics, Yazd University, P.O. Box 89195-741, Yazd 89195-741, Iran.
Dipartimento di Ingegneria dell'Innovazione, Università del Salento, via per Monteroni, km 1, 73100 Lecce, Italy.
Nanomaterials (Basel). 2019 Nov 16;9(11):1627. doi: 10.3390/nano9111627.
The performances of organometallic halide perovskite-based solar cells severely depend on the device architecture and the interface between each layer included in the device stack. In particular, the interface between the charge transporting layer and the perovskite film is crucial, since it represents both the substrate where the perovskite polycrystalline film grows, thus directly influencing the active layer morphology, and an important site for electrical charge extraction and/or recombination. Here, we focus on engineering the interface between a perovskite-polymer nanocomposite, recently developed by our group, and different commonly employed polymeric hole transporters, namely PEDOT: PSS [poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)], PEDOT, PTAA [poly(bis 4-phenyl}{2,4,6-trimethylphenyl}amine)], Poly-TPD [Poly(,'-bis(4-butylphenyl)-,'-bis(phenyl)-benzidine] Poly-TPD, in inverted planar perovskite solar cell architecture. The results show that when Poly-TPD is used as the hole transfer material, perovskite film morphology improved, suggesting an improvement in the interface between Poly-TPD and perovskite active layer. We additionally investigate the effect of the Molecular Weight (MW) of Poly-TPD on the performance of perovskite solar cells. By increasing the MW, the photovoltaic performances of the cells are enhanced, reaching power conversion efficiency as high as 16.3%.
基于有机金属卤化物钙钛矿的太阳能电池的性能严重依赖于器件结构以及器件堆叠中各层之间的界面。特别是，电荷传输层与钙钛矿薄膜之间的界面至关重要，因为它既是钙钛矿多晶薄膜生长的基底，直接影响活性层的形态，又是电荷提取和/或复合的重要位点。在此，我们着重研究我们团队最近开发的钙钛矿 - 聚合物纳米复合材料与不同常用聚合物空穴传输体之间的界面工程，这些空穴传输体包括PEDOT:PSS[聚(3,4 - 乙撑二氧噻吩):聚苯乙烯磺酸盐]、PEDOT、PTAA[聚(双4 - 苯基}{2,4,6 - 三甲基苯基}胺)]、聚 - TPD[聚(,' - 双(4 - 丁基苯基)-,' - 双(苯基)-联苯胺]聚 - TPD，应用于倒置平面钙钛矿太阳能电池结构中。结果表明，当使用聚 - TPD作为空穴传输材料时，钙钛矿薄膜形态得到改善，这表明聚 - TPD与钙钛矿活性层之间的界面有所改善。我们还研究了聚 - TPD的分子量对钙钛矿太阳能电池性能的影响。通过增加分子量，电池的光伏性能得到增强，功率转换效率高达16.3%。
