Efficient and Stable CsPbI3 Inorganic Perovskite Photovoltaics Enabled by Crystal Secondary Growth

  title={Efficient and Stable CsPbI3 Inorganic Perovskite Photovoltaics Enabled by Crystal Secondary Growth},
  author={Xingtao Wang and Yong Wang and Yuetian Chen and Xiaomin Liu and Yixin Zhao},
  journal={Advanced Materials},
Defect‐triggered phase degradation is generally considered as the main issue that causes phase instability and limited device performance for CsPbI3 inorganic perovskites. Here, a defect compensation in CsPbI3 perovskite through crystal secondary growth of inorganic perovskites is demonstrated, and highly efficient inorganic photovoltaics are realized. This secondary growth is achieved by a solid‐state reaction between a bromine salt and defective CsPbI3 perovskite. Upon solid‐state reaction… 
20 Citations
Intermediate-Phase-Modified Crystallization for Stable and Efficient CsPbI3 Perovskite Solar Cells.
All-inorganic CsPbI3 perovskite solar cells (PSCs) are becoming desirable for their excellent photovoltaic ability and adjustable crystal structure distortion. However, the unsatisfactory
Ge Incorporation to Stabilize Efficient Inorganic CsPbI3 Perovskite Solar Cells
Aiming at stable CsPbI3 perovskite solar cells, Ge incorporated for the first time into DMAPbI3‐based precursor systems. Ge incorporation is found to be able to modify crystallization growth of
Stoichiometric Dissolution of Defective CsPbI2Br Surfaces for Inorganic Solar Cells with 17.5% Efficiency
The existence of a defective area composed of nanocrystals and amorphous phases on a perovskite film inevitably causes nonradiative charge recombination and structural degradation in perovskite
CsPb(Br/Cl)3 Perovskite Nanocrystals with Bright Blue Emission Synergistically Modified by Calcium Halide and Ammonium Ion
Colloidal cesium lead halide (CsPbX3, X = Cl, Br, and I) perovskite nanocrystals (NCs) demonstrate supreme optical properties in the spectra region of infrared, red, and green. High-performance
The Chemical Design in High-Performance Lead Halide Perovskite: Additive vs Dopant?
Several commonly used chemicals for hybrid and all-inorganic perovskites, such as MACl, DMAI, MAAc, and alkali metal cations are summarized and proposed some conclusive important factors to clarify additives and dopants, which would be helpful for the further chemical design for improving high-performanceperovskite devices.
Tailoring Defects Regulation in Air-Fabricated CsPbI3 for Efficient Inverted All-Inorganic Perovskite Solar Cells with Voc of 1.225 V.
  • Sheng Fu, Nannan Sun, Junfeng Fang
  • Materials Science
    ACS applied materials & interfaces
  • 2022
Air fabrication of CsPbI3 perovskite photovoltaics has been attractive and fast-moving owing to its compatibility to low-cost and up-scalable fabrication. However, due to the inevitable erosions,


High Phase Stability in CsPbI3 Enabled by Pb–I Octahedra Anchors for Efficient Inorganic Perovskite Photovoltaics
This work demonstrates a promising concept to achieve highly phase-stabilized inorganic perovskite with suppressed defect density for promoting its optoelectronic applications.
Thermodynamically stabilized β-CsPbI3–based perovskite solar cells with efficiencies >18%
High crystalline β-CsPbI3 films are obtained with an extended spectral response and enhanced phase stability and made from the treated material have highly reproducible and stable efficiencies reaching 18.4% under 45 ± 5°C ambient conditions.
Defect‐Engineering‐Enabled High‐Efficiency All‐Inorganic Perovskite Solar Cells
All-inorganic PSCs based on CsPbI3 :Br:InI3 and carbon electrode exhibit PCE and open-circuit voltage as high as 12.04% and 1.20 V, respectively, and demonstrate excellent stability in air for more than two months, while those based on H2O can survive only a few days in air.
Bication lead iodide 2D perovskite component to stabilize inorganic α-CsPbI3 perovskite phase for high-efficiency solar cells
It is discovered that a small amount of two-dimensional EDAPbI4 perovskite containing the ethylenediamine (EDA) cation stabilizes the α-CsPbI3 to avoid the undesirable formation of the nonperovskites δ phase.
The Role of Dimethylammonium Iodine in CsPbI3 Perovskite Fabrication: Additive or Dopant?
This work demonstrated that the DMAI is an effective volatile additive to manipulate the crystallization process of CsPbI 3 inorganic perovskite films with different crystal phases and morphologies and confirmed the time-of-flight secondary ion mass spectrometry and nuclear magnetic resonance results confirmed the D MAI additive would not alloy into CsDMAI 3 perovksite 's crystal lattice.
Vacancy-Driven Stabilization of the Cubic Perovskite Polymorph of CsPbI3
The inorganic halide perovskite CsPbI3 has shown great promise for efficient solar cells, but the instability of its cubic phase remains a major challenge. We present a route for stabilizing the
Anharmonicity and Disorder in the Black Phases of Cesium Lead Iodide Used for Stable Inorganic Perovskite Solar Cells.
It is shown through high-resolution in situ synchrotron XRD measurements that CsPbI3 can be undercooled below its transition temperature and temporarily maintained in its perovskite structure down to room temperature, stabilizing a metastable perovkite polytype (black γ-phase) crucial for photovoltaic applications.
Quantum dot–induced phase stabilization of α-CsPbI3 perovskite for high-efficiency photovoltaics
N nanoscale phase stabilization of CsPbI3 quantum dots (QDs) to low temperatures that can be used as the active component of efficient optoelectronic devices and describe the formation of α-CsP bI3 QD films that are phase-stable for months in ambient air.
Soft Lattice and Defect Covalency Rationalize Tolerance of β-CsPbI3 Perovskite Solar Cells to Native Defects.
This work uses ab initio non-adiabatic molecular dynamics to show that native point defects in β-CsPbI 3 are generally benign for non-radiative charge recombination, regardless of whether they introduce shallow or deep trap states, and proposes that strong defect tolerance is general to metal halide perovskites because they exhibit much lower bulk moduli compared to the conventional semiconductors.