Photovoltaic performance improvement in vacuum-assisted meniscus printed triple-cation mixed-halide perovskite films by surfactant engineering

Parvazian, E ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1021/acsaem.9b00707
  3. Publisher: American Chemical Society , 2019
  4. Abstract:
  5. Scalable coating methods have recently emerged as practical alternative deposition techniques to the conventional spin-coating despite their lower yielding power conversion efficiencies (PCEs). The most important barrier acting against the use of scalable deposition methods to get a highly absorbing (>95%) film with controlled morphology in the high crystallinity of perovskite particles is the impossibility of antisolvent dripping during the deposition. Here, we demonstrate the positive role of both the surfactant-engineering and the vacuum-annealing (<100 Pa) process in improving the device performance to overcome this limit. A detailed optimization of the vacuum-assisted meniscus printing parameters is discussed to get a pinhole-free triple-cation mixed-halide perovskite layer with high crystallinity. In particular, the results showed that with the increase in surface coverage, wettability and perovskite crystallinity were achieved by adding Triton X-100 (12.5 mM) as a surfactant into the precursor solution. The perovskite devices with the optimized precursor ink formula and optimized meniscus printing parameters showed a PCE of 15.1 and 12.3 with the active area of 0.09 cm2 and 1 cm2, respectively. Consequently, the obtained results suggested that perovskite cells made by this vacuum-assisted printing technique and the precursor system could lead to the improved device performance and reproducibility in a high humidity (70-90%) environment. © 2019 American Chemical Society
  6. Keywords:
  7. Meniscus printing ; Perovskite ; Solar cell ; Surfactant ; Vacuum process ; Coatings ; Crystallinity ; Deposition ; Morphology ; Perovskite ; Positive ions ; Solar cells ; Surface active agents ; Controlled morphology ; Deposition technique ; Perovskite particles ; Photovoltaic performance ; Power conversion efficiencies ; Precursor solutions ; Printing techniques ; Vacuum process ; Perovskite solar cells
  8. Source: ACS Applied Energy Materials ; Volume 2, Issue 9 , 2019 , Pages 6209-6217 ; 25740962 (ISSN)
  9. URL: https://pubs.acs.org/doi/abs/10.1021/acsaem.9b00707