Enhanced performance of perovskite solar cells by incorporation of a triphenylamine derivative into hole-transporting poly(3-hexylthiophene) layers

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) 2019, 73(0), , pp.175-181
• Main Authors: Kim, Ji Young, Kwak, Giseop, Choi, Yong Chan, Kim, Dae-Hwan, Han, Yoon Soo
• Format: Article
• Language: English
• Subjects: Additive; Hole mobility; m-MTDATA; Perovskite solar cell; Poly(3-hexylthiophene); 화학공학
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2019.01.022

4,4′,4″-Tris[phenyl(m-tolyl)amino]triphenylamine (m-MTDATA) was applied as an additive to hole-transporting poly(3-hexylthiophene) [P3HT] layers in perovskite solar cells. The incorporation of 0.5wt% m-MTDATA into the P3HT layers led to an increased power conversion efficiency owing to the enhancement in the short-circuit current, the open-circuit voltage and the fill factor, compared with that of the control cell without the additive. It was found that the improved efficiency was attributed to an increase in the hole mobility and a reduction in the charge recombination. [Display omitted] •Performance of PeSCs was increased by m-MTDATA incorporation to P3HT layer.•m-MTDATA in P3HT played a role of enhancing hole mobility and reducing charge recombination.•Enhanced hole mobility and reduced charge recombination led to an increase in Jsc, Voc and FF.•m-MTDATA incorporation in P3HT is a good strategy to improve performance of PeSCs. A 4,4′,4″-tris[phenyl(m-tolyl)amino]triphenylamine (m-MTDATA) was applied as an additive to hole-transporting poly(3-hexylthiophene) [P3HT] layers in perovskite solar cells. The incorporation of 0.5wt% m-MTDATA to the P3HT layer led to an increased power conversion efficiency of 9.53%, due to an enhancement in the short circuit current, open-circuit voltage and fill factor, compared with that (8.76%) of the control cell without the additive. This enhanced performance was attributed to an increase in the hole mobility and a decrease in the charge recombination of the device with the P3HT:m-MTDATA blend film, compared to those of the control device with the pristine P3HT film.