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High-Work-Function 2D Perovskites as Passivation Agents in Perovskite Solar Cells AITranslate

Erfan Shirzadi; Fatemeh Ansari; Hiroaki Jinno; Shun Tian; Olivier Ouellette; Felix. T. Eickemeyer; Brian Carlsen; Antoine Van Muyden; Hiroyuki Kanda; Naoyuki Shibayama; Farzaneh Fadaei Tirani; Michael Grätzel; Anders Hagfeldt; Mohammad Khaja Nazeeruddin; Paul J. Dyson;
Swiss Federal Institute of Technology Lausanne (EPFL); Swiss Federal Institute of Technology Lausanne (EPFL); Swiss Federal Institute of Technology Lausanne (EPFL); Swiss Federal Institute of Technology Lausanne (EPFL); Swiss Federal Institute of Technology Lausanne (EPFL); Swiss Federal Institute of Technology Lausanne (EPFL); Swiss Federal Institute of Technology Lausanne (EPFL); Swiss Federal Institute of Technology Lausanne (EPFL); Swiss Federal Institute of Technology Lausanne (EPFL); The University of Tokyo; Swiss Federal Institute of Technology Lausanne (EPFL); Swiss Federal Institute of Technology Lausanne (EPFL); Swiss Federal Institute of Technology Lausanne (EPFL); Swiss Federal Institute of Technology Lausanne (EPFL); Swiss Federal Institute of Technology Lausanne (EPFL)
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Abstract AITranslate

Various approaches have been employed to passivate the defects in perovskite films used in perovskite solar cells (PSCs). However, the passivation mechanism is often unclear at a molecular level, and the reason for enhanced PSC performance often remains elusive. Here, we explore the impact of passivation with high-work-function two-dimensional (2D) perovskites in promoting the efficiency of PSCs. We realized that 4-halophenylethylammonium lead iodide possesses a high work function, causing band bending at the perovskite surface, thus suppressing charge carrier recombination at the perovskite/hole transporting material (HTM) interface by forming a barricade for electrons to recombine at the trap states. Utilizing this strategy leads to a ∼100 mV improvement in voltage and a ∼2.5% increase in power conversion efficiency (PCE).

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DOI：https://doi.org/10.1021/acsenergylett.3c01326

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Citation Information:

Various approaches have been employed to passivate the defects in perovskite films used in perovskite solar cells (PSCs). However, the passivation mechanism is often unclear at a molecular level, and the reason for enhanced PSC performance often remains elusive. Here, we explore the impact of passivation with high-work-function two-dimensional (2D) perovskites in promoting the efficiency of PSCs. We realized that 4-halophenylethylammonium lead iodide possesses a high work function, causing band bending at the perovskite surface, thus suppressing charge carrier recombination at the perovskite/hole transporting material (HTM) interface by forming a barricade for electrons to recombine at the trap states. Utilizing this strategy leads to a ∼100 mV improvement in voltage and a ∼2.5% increase in power conversion efficiency (PCE).

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GB/T 7714-2015 [1] Erfan Shirzadi, Fatemeh Ansari, Hiroaki Jinno, et al. ACS Energy Letters, 2023(8). DOI:10.1021/acsenergylett.3c01326.
MLA [1] Erfan Shirzadi, et al., ACS Energy Letters, no. 8, 2023, https://doi.org/10.1021/acsenergylett.3c01326.
APA [1] Erfan Shirzadi, Fatemeh Ansari, Hiroaki Jinno, Shun Tian, Olivier Ouellette, Felix. T. Eickemeyer, Brian Carlsen, Antoine Van Muyden, Hiroyuki Kanda, Naoyuki Shibayama, Farzaneh Fadaei Tirani, Michael Grätzel, Anders Hagfeldt, Mohammad Khaja Nazeeruddin, & Paul J. Dyson. (2023). ACS Energy Letters(8). https://doi.org/10.1021/acsenergylett.3c01326
IEEE [1] Erfan Shirzadi, Fatemeh Ansari, Hiroaki Jinno, Shun Tian, Olivier Ouellette, Felix. T. Eickemeyer, Brian Carlsen, Antoine Van Muyden, Hiroyuki Kanda, Naoyuki Shibayama, Farzaneh Fadaei Tirani, Michael Grätzel, Anders Hagfeldt, Mohammad Khaja Nazeeruddin, and Paul J. Dyson, ACS Energy Letters, no. 8, 2023, doi: 10.1021/acsenergylett.3c01326.