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Nano energy v.31, 2017년, pp.210 - 217   SCIE
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Amorphous hole-transporting layer in slot-die coated perovskite solar cells

Qin, Tianshi (Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, PR China ) ; Huang, Wenchao (Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia ) ; Kim, Jueng-Eun (Ian Wark Laboratory, CSIRO Materials Science & Engineering, Clayton South, Victoria 3169, Australia ) ; Vak, Doojin (Ian Wark Laboratory, CSIRO Materials Science & Engineering, Clayton South, Victoria 3169, Australia ) ; Forsyth, Craig (School of Chemistry Monash University, Clayton, Victoria 3800, Australia ) ; McNeill, Christopher R. (Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia ) ; Cheng, Yi-Bing (Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia ) ;
  • 초록  

    Abstract Perovskite solar cells can be produced by a solution process and have achieved power conversion efficiency over 20% as well as improving long-term stability, offering great potential for a low cost, high efficiency photovoltaic technology. An increasing effort has been shifted to Lab-to-Fab translation, where device manufacture is accomplished by using a fully scalable printing process. One remarkable bottleneck for upscaling the device is, however, the lack of scalable hole-transport materials (HTMs) that can form the desired morphology during the printing fabrication. In this manuscript, we apply a twisted but fully π-conjugated 2,2′,7,7′-tetrakis(N,N-di- p -methoxyphenyl)amine-9,9′-bifluorenylidene (Bifluo-OMeTAD) into slot-die coated devices, which exhibits excellent film forming properties and outperforms the well-known Spiro-OMeTAD HTM. The improved film forming properties of Bifluo-OMeTAD are achieved via molecular design, with the chemical structure of Bifluo-OMeTAD effectively suppressing crystallization during printing. A power conversion efficiency of 14.7% is achieved in the fully slot-die coated devices based on Bifluo-OMeTAD, outperforming previous reported values for all-printed perovskite solar cells. Therefore, Bifluo-OMeTAD has attractive potential to replace Spiro-OMeTAD for the large scale roll-to-roll production of fully slot-die coated perovskite solar cells. Highlights A power conversion efficiency of 14.7% is achieved in the fully slot-die coated devices based on an amorphous hole transport layer Bifluo-OMeTAD. The improved film forming properties of Bifluo-OMeTAD are achieved via molecular design. The chemical structure of Bifluo-OMeTAD effectively suppresses crystallization during slot-die printing. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Perovskite .   Solar cells .   Printing .   Hole transport material .   Amorphous .   Slot-die.  

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