Lithium Fluoride Assisted Preparation of High‐Performance All‐Inorganic CsPbI<sub>3</sub> Perovskite Solar Cells

Huang, Jin; Shi, Kewang; Chen, Chunyang; Wang, Hao; Liu, Shengzhong

doi:10.1002/ente.202201242

Cited by 3 publications

(3 citation statements)

References 42 publications

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“…Zhang et al introduced monovalent Rb cations with smaller ion radii into inorganic CsPbI 2 Br perovskites, confirming that Rb cation is contributed to the shrinkage of the perovskite lattice structure and the structural stability of perovskite is enhanced [18]. Huang et al found that doping LiF can effectively promote the crystal growth kinetic process of perovskite, passivate grain boundary defects, and significantly improve device performance [19]. Chen et al found that the addition of RbF can improve the conductivity of tin oxide films and passivate the defects attached to the SnO 2 /perovskite interface.…”

Section: Introductionmentioning

confidence: 99%

Rubidium fluoride additive for high-efficiency and low-hysteresis all-inorganic CsPbI₃ perovskite solar cells

Zhang,

Chen,

Ren

et al. 2023

Semicond. Sci. Technol.

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All-inorganic CsPbI3 perovskite solar cells (PSCs) technology is gradually maturing. However, the power conversion efficiency still needs to be improved, and the hysteresis phenomenon seriously hinders the development of PSCs. Herein, in this paper, a new inorganic fluorine-containing additive was developed, rubidium fluoride (RbF) was used as a precursor additive, and the incorporation of RbF effectively improved the crystallization kinetics of CsPbI3 perovskite films and inhibited the occurrence of hysteresis. The experimental results doped 0.03 mol% RbF in CsPbI3 effectively inhibited the formation of perovskite layer defects and promoted the carrier dynamics process. The non-radiative recombination is significantly suppressed, and the device stability is significantly improved. In particular, by doping 0.03 mol% RbF into the CsPbI3, the hysteresis index of PSCs is 0.003. The RbF doping of 0.03mol% in CsPbI3 effectively improves the PCE of PSCs, and the highest efficiency can reach 17.21%. The environmental stability of the RbF doping of 0.03mol% has also been significantly enhanced.

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Section: Introductionmentioning

confidence: 99%

Rubidium fluoride additive for high-efficiency and low-hysteresis all-inorganic CsPbI₃ perovskite solar cells

Zhang,

Chen,

Ren

et al. 2023

Semicond. Sci. Technol.

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“…In recent years, all-inorganic cesium lead iodide(CsPbI 3 ) perovskites have found widespread applications in optoelectronic devices such as solar cells and photodetectors due to their outstanding performance [27][28][29]. Scholars have demonstrated that heterostructures based on epitaxial CsPbI 3 and other semiconductors (e.g., CsPbI 3 /PtSe 2 , CsPbI 3 /WTe 2 , and CsPbI 3 /FAPbI 3 ) open up new possibilities for band structural engineering and novel devices [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

First-principles calculations for heterostructure studies Involving CsPbI₃ perovskite and IV-VI semiconductors

Lin,

Sun,

Liu

et al. 2024

Phys. Scr.

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The heterostructure composed of lead chalcogenides (PbX, X=S, Se, Te) and halide perovskite CsPbI3 has recently emerged as a promising candidate for optoelectronic devices. This study uses theoretical investigations using first-principles calculations with the VASP software to understand the structural, electronic, and optical properties of the PbX(X=S, Se, Te)/CsPbI3 heterostructure. Appropriate lattice mismatch rates(4.6%, 2.4%, 3.8%) and similar octahedral frameworks are confirmed, ensuring the feasibility of constructing the PbX/CsPbI3 heterostructure. Electronic property calculations unveiled the physical mechanisms enhancing luminescence efficiency. The I-type band alignment at the PbX/CsPbI3 interface(-5.27eV<PbX<-3.73eV, -5.34eV<CsPbI3<-3.57eV) contributes to the reduction of electron and hole recombination losses, thereby enhancing energy transfer efficiency. This favorable arrangement facilitates the transfer of electrons and holes from the CsPbI3 layer to the PbX material, a conclusion supported by the difference in charge density. PbSe/CsPbI3 exhibited superior charge transfer capabilities among the three heterostructures, with electron clouds more pronounced than the others. The heterostructure extended the light absorption range of CsPbI3 from visible to near-infrared due to the influence of PbX. By comparing the absorption spectra's magnitude, this study finds that PbTe/CsPbI3>PbSe/CsPbI3>PbS/CsPbI3. PbSe/CsPbI3 performs best in terms of stability, charge density transfer, and optical properties. Furthermore, under the premise of ensuring stability, different optical absorption characteristics can be achieved by adjusting the composition of Se atoms in PbSe/CsPbI3. This work provides a theoretical basis for the physical mechanisms behind enhancing the performance of PbX/CsPbI3 heterostructures as visible-to-near-infrared optoelectronic materials. It offers a promising avenue for the design of high-performance visible-to-near-infrared optoelectronic materials.

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“…Additionally, some papers have reported a codoping strategy to stabilized β/γ-phase CsPbI 3 [88][89][90] . For example, codoping with Li + and F − was investigated for stabilizing β-phase CsPbI 3 by increasing the grain sizes, improving the crystallinity, and reducing the defect density 91 . Similarly, codoping with In 3+ and Br − improved the crystal quality and thermal stability of β-CsPbI 2.5 Br 0.5…”

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confidence: 99%

Phase stabilization of cesium lead iodide perovskites for use in efficient optoelectronic devices

Jin,

Zeng,

Steele

et al. 2024

NPG Asia Mater

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All-inorganic lead halide perovskites (LHPs) and their use in optoelectronic devices have been widely explored because they are more thermally stable than their hybrid organic‒inorganic counterparts. However, the active perovskite phases of some inorganic LHPs are metastable at room temperature due to the critical structural tolerance factor. For example, black phase CsPbI3 is easily transformed back to the nonperovskite yellow phase at ambient temperature. Much attention has been paid to improving the phase stabilities of inorganic LHPs, especially those with high solar cell efficiencies. Herein, we discussed the origin of phase stability for CsPbI3 and the strategies used to stabilize the cubic (α) phase. We also assessed the CsPbI3 black β/γ phases that are relatively stable at nearly room temperature. Furthermore, we determined the relationship between phase stabilization and defect passivation and reviewed the growing trend in solar cell efficiency based on black phase CsPbI3. Finally, we provide perspectives for future research related to the quest for optimum device efficiency and green energy.

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Lithium Fluoride Assisted Preparation of High‐Performance All‐Inorganic CsPbI₃ Perovskite Solar Cells

Cited by 3 publications

References 42 publications

Rubidium fluoride additive for high-efficiency and low-hysteresis all-inorganic CsPbI₃ perovskite solar cells

Rubidium fluoride additive for high-efficiency and low-hysteresis all-inorganic CsPbI₃ perovskite solar cells

First-principles calculations for heterostructure studies Involving CsPbI₃ perovskite and IV-VI semiconductors

Phase stabilization of cesium lead iodide perovskites for use in efficient optoelectronic devices

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Lithium Fluoride Assisted Preparation of High‐Performance All‐Inorganic CsPbI3 Perovskite Solar Cells

Cited by 3 publications

References 42 publications

Rubidium fluoride additive for high-efficiency and low-hysteresis all-inorganic CsPbI3 perovskite solar cells

Rubidium fluoride additive for high-efficiency and low-hysteresis all-inorganic CsPbI3 perovskite solar cells

First-principles calculations for heterostructure studies Involving CsPbI3 perovskite and IV-VI semiconductors

Phase stabilization of cesium lead iodide perovskites for use in efficient optoelectronic devices

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Lithium Fluoride Assisted Preparation of High‐Performance All‐Inorganic CsPbI₃ Perovskite Solar Cells

Rubidium fluoride additive for high-efficiency and low-hysteresis all-inorganic CsPbI₃ perovskite solar cells

Rubidium fluoride additive for high-efficiency and low-hysteresis all-inorganic CsPbI₃ perovskite solar cells

First-principles calculations for heterostructure studies Involving CsPbI₃ perovskite and IV-VI semiconductors