Revealing Crystallization Dynamics and the Compositional Control Mechanism of 2D Perovskite Film Growth by In Situ Synchrotron-Based GIXRD - Archive ouverte HAL
Article Dans Une Revue ACS Energy Letters Année : 2020

Revealing Crystallization Dynamics and the Compositional Control Mechanism of 2D Perovskite Film Growth by In Situ Synchrotron-Based GIXRD

Liang Kuai
  • Fonction : Auteur
Junnan Li
  • Fonction : Auteur
Yajuan Li
  • Fonction : Auteur
Yusheng Wang
  • Fonction : Auteur
Pandeng Li
  • Fonction : Auteur
Yuanshuai Qin
  • Fonction : Auteur
Tao Song
  • Fonction : Auteur
Yingguo Yang
  • Fonction : Auteur
Xingyu Gao
  • Fonction : Auteur
Baoquan Sun
  • Fonction : Auteur

Résumé

Quasi-two-dimensional (2D) perovskites promise the intrinsically stable solar cell performance. However, the crystal orientation and phase distribution in 2D solution processed perovskite are difficult to be manipulated, which restricts the device efficiency as well as its reproducibility. Here, we simply incorporate potassium ion (K +) into quasi-2D precursor solution, which can dramatically change the nucleation steps during perovskite films spin-coating process probed by in-situ synchrotron-based grazing incident X-ray diffraction (GIXRD). It is notable that a desired vertical oriented 2D phase without intermediate compound can be easily formed after spin-coating, which simultaneously reduces the distribution of low dimensional 2D perovskite phases in association with suppressed trap states. Therefore, the power conversion efficiency of doped 10% K + 2D perovskite solar cells can yield up to 11.3% as well as long-term stable performance with high reproducibility. This work paves a key path to control the quasi-2D nucleation and crystallization processing via chemical additives.
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Dates et versions

hal-02989846 , version 1 (21-11-2020)

Identifiants

Citer

Liang Kuai, Junnan Li, Yajuan Li, Yusheng Wang, Pandeng Li, et al.. Revealing Crystallization Dynamics and the Compositional Control Mechanism of 2D Perovskite Film Growth by In Situ Synchrotron-Based GIXRD. ACS Energy Letters, 2020, 5 (1), pp.8-16. ⟨10.1021/acsenergylett.9b02366⟩. ⟨hal-02989846⟩
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