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Polystyrene enhanced crystallization of perovskites towards high performance solar cells

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Abstract

Perovskite solar cells have attracted significant attention due to their high efficiency and low cost. In the research on methylammonium lead-iodide (CH3NH3PbI3), a lot of work has been devoted to optimize the film morphology and crystallinity resulting in an enhancement of the power conversion efficiency (PCE). A good surface coverage and uniform perovskite films are highly desirable along with a smooth and pinhole-free contact between the hole and electron extraction layers. Overall, this affects the charge transport and collection, and reduces charge recombination. Herein, we demonstrate a facile route to control perovskite crystallization by inserting an optimal amount of insulating polystyrene in the perovskite precursor solutions. The incorporation of a small amount of polystyrene results in much better surface coverage, and a smoother and uniform perovskite thin film leading to improved crystallization and larger grain size. Via careful optimization, and easy and low temperature solution-based processing, below 100 °C, we realize a device with PCE exceeding 13% along with significantly reduced leakage current.

Graphical abstract: Polystyrene enhanced crystallization of perovskites towards high performance solar cells

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Publication details

The article was received on 20 Jun 2018, accepted on 16 Aug 2018 and first published on 29 Aug 2018


Article type: Communication
DOI: 10.1039/C8NA00052B
Citation: Nanoscale Adv., 2019, Advance Article
  • Open access: Creative Commons BY-NC license
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    Polystyrene enhanced crystallization of perovskites towards high performance solar cells

    H. P. Kim, Abd. R. bin Mohd Yusoff and J. Jang, Nanoscale Adv., 2019, Advance Article , DOI: 10.1039/C8NA00052B

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