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Bifunctional Ultrathin PCBM Enables Passivated Trap States and Cascaded Energy Level toward Efficient Inverted Perovskite Solar Cells.
Li, Dongyang; Kong, Weiguang; Zhang, Haichao; Wang, Deng; Li, Wang; Liu, Changwen; Chen, Hong; Song, Weidong; Gao, Fangliang; Amini, Abbas; Xu, Baomin; Li, Shuti; Cheng, Chun.
Afiliación
  • Li D; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, P. R. China.
  • Kong W; Laboratory of Nanophotonic Functional Materials and Devices, Institute of Semiconductor, South China Normal University, Guangzhou 510631, P. R. China.
  • Zhang H; Hebei Key Laboratory of Optic-Electronic Information and Materials and National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, P. R. China.
  • Wang D; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, P. R. China.
  • Li W; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, P. R. China.
  • Liu C; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, P. R. China.
  • Chen H; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, P. R. China.
  • Song W; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, P. R. China.
  • Gao F; College of Applied Physics and Materials, Wuyi University, 22 Dongcheng Village, Jiangmen 529020, Guangdong, P. R. China.
  • Amini A; Laboratory of Nanophotonic Functional Materials and Devices, Institute of Semiconductor, South China Normal University, Guangzhou 510631, P. R. China.
  • Xu B; Center for Infrastructure Engineering, Western Sydney University, Kingswood, NSW 275, Australia.
  • Li S; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, P. R. China.
  • Cheng C; Shenzhen Engineering Research and Development Center for Flexible Solar Cells, Southern University of Science and Technology (SUSTech), Shenzhen 518055, P. R. China.
ACS Appl Mater Interfaces ; 12(17): 20103-20109, 2020 Apr 29.
Article en En | MEDLINE | ID: mdl-32252523
Inverted perovskite solar cells (PSCs) with a C60 framework are known for their common drawback of low power conversion efficiency (PCE) of <20% because of nonradiative recombination and inefficient charge transport at their perovskite interfaces. Here, we report an ultrathin [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as a cap layer on perovskite films to overcome this issue. Such a functional cap layer efficiently passivates trap states and establishes a gradient energy level alignment onto perovskite, facilitating the efficient charge transfer and extraction. The as-fabricated inverted PSCs capped with such ultrathin PCBM exhibit a record PCE of 20.07%. After the storage under a N2 atmosphere for more than 500 h, the PCE of PSCs retains over 85% of its initial level. Our work provides an effective method to upgrade inverted PSCs with the C60 framework with improved efficiency and stability.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2020 Tipo del documento: Article

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2020 Tipo del documento: Article