Advent of alkali metal doping: a roadmap for the evolution of perovskite solar cells

Ammarah, Kausar; Sattar, Abdul; Xu, Chang-Hua; Zhang, Suicai; Kang, Zhuo; Zhang, Yue

doi:10.1039/d0cs01316a

Cited by 93 publications

(71 citation statements)

References 180 publications

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“…Interestingly, doping with alkali metals such as Li, Na, K, Rb and Cs has been reported to increase the carrier lifetime. 112,113 We hypothesize that these alkali metal ions help passivate the defect states. Recent investigations show that they probably partially substitute on Pb site.…”

Section: Elemental Mixing and Dopingmentioning

confidence: 99%

Atomistic origin of lattice softness and its impact on structural and carrier dynamics in three dimensional perovskites

Guo

Wang

Yin

2022

Energy Environ. Sci.

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Section: Elemental Mixing and Dopingmentioning

confidence: 99%

Atomistic origin of lattice softness and its impact on structural and carrier dynamics in three dimensional perovskites

Guo

Wang

Yin

2022

Energy Environ. Sci.

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“…Passivating defects is an effective strategy to reduce charge non‐radiative recombination and improve the performance of PSCs. [ 10,17,19–21 ] The passivation can occur through various mechanisms, including coordination bonds, ionic bonds, and hydrogen bonds. Some larger organic cations, such as phenethylamine, polyethylenimine, and trifluoroethylamine, are widely employed to passivate defects.…”

Section: Introductionmentioning

confidence: 99%

Fluoroethylamine Engineering for Effective Passivation to Attain 23.4% Efficiency Perovskite Solar Cells with Superior Stability

Zhang

et al. 2021

Advanced Energy Materials

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Defects in perovskite layers usually cause nonradiative recombination, impairing device performance and stability. Here, fluoroethylamine (FC2H4NH3, FEA) is integrated into the perovskite film to passivate defects. By engineering of different amounts of fluorine in the molecule, it is found that when 2‐fluoroethylamine (1FEA), in which one F bonds to the first carbon atom at the end of the molecule's structure, is used, the F atoms appear to be distributed throughout the bulk to the very surface. When 2,2‐difluoroethylamine (2FEA) and 2, 2, 2‐trifluoroethylamine (3FEA) are used, F is prone to distribution in the bulk of the perovskite film, while there appears to be no detectable F content on the surface. With the FEA passivation, the nonradiative recombination is suppressed, the carrier‐lifetime is improved to 840.01 ns, and the film‐air interface offers greater hydrophobicity, especially in the case of 1FEA, where because it is distributed throughout the film thickness, it passivates more defects and delivers the highest efficiency, as much as 23.40%. The device with 3FEA shows the best environmental stability; specifically, the bare cell without any encapsulation maintains 87% of its initial efficiency after exposure to the ambient environment for 1200 h.

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“…Rubidium cation (Rb + ) can be incorporated into a “cation cascade” to fabricate perovskite structure, leading to excellent photoelectric properties. [ 36,37 ] Saliba and co‐workers designed a novel component of Rb 0.05 Cs 0.10 FA 0.85 PbI 3 to obtain a highly crystalline MA‐free perovskite and high PCE of 20.35% for the PSCs. [ 38 ] It is well known that trap‐assisted nonradiative recombination losses impair the performance of the PSCs.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Efficiency and Mechanical Robustness of Flexible Perovskite Solar Cells by Using HPbI₃ Additive

et al. 2021

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High efficiency and mechanical stability are in great demand for commercial applications of the flexible perovskite solar cells (PSCs) in portable and wearable electronics. Herein, power conversion efficiency (PCE) and mechanical robustness of the methylammonium (MA)‐free flexible PSCs are simultaneously enhanced by incorporating a HPbI3 additive with optimal content in the perovskite precursor solution. The HPbI3 additive facilitates an improved morphology and crystallinity, as well as a decreased work function of the perovskite films, leading to improved device performance. As a result, PCEs of 20.1% and 18.74% are obtained for the rigid and flexible PSCs, respectively, which are among the best results for inverted MA‐free PSCs. The flexible PSCs maintain 95% and 70% of the initial PCE value after 1000 and 5000 bending cycles, respectively, at a bending radius of 4 mm. The current result reveals that using the HPbI3 additive is a universal strategy to enhance performance of the flexible PSCs effectively and promote the development of the perovskite‐based photovoltaics.

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Advent of alkali metal doping: a roadmap for the evolution of perovskite solar cells

Abstract: Metal–halide hybrid perovskites have prompted the prosperity of the sustainable energy field and simultaneously demonstrated their great potential in meeting both the growing consumption of energy and the increasing social development requirements.

Cited by 93 publications

References 180 publications

Atomistic origin of lattice softness and its impact on structural and carrier dynamics in three dimensional perovskites

Atomistic origin of lattice softness and its impact on structural and carrier dynamics in three dimensional perovskites

Fluoroethylamine Engineering for Effective Passivation to Attain 23.4% Efficiency Perovskite Solar Cells with Superior Stability

Enhanced Efficiency and Mechanical Robustness of Flexible Perovskite Solar Cells by Using HPbI₃ Additive

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Advent of alkali metal doping: a roadmap for the evolution of perovskite solar cells

Abstract: Metal–halide hybrid perovskites have prompted the prosperity of the sustainable energy field and simultaneously demonstrated their great potential in meeting both the growing consumption of energy and the increasing social development requirements.

Cited by 93 publications

References 180 publications

Atomistic origin of lattice softness and its impact on structural and carrier dynamics in three dimensional perovskites

Atomistic origin of lattice softness and its impact on structural and carrier dynamics in three dimensional perovskites

Fluoroethylamine Engineering for Effective Passivation to Attain 23.4% Efficiency Perovskite Solar Cells with Superior Stability

Enhanced Efficiency and Mechanical Robustness of Flexible Perovskite Solar Cells by Using HPbI3 Additive

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Enhanced Efficiency and Mechanical Robustness of Flexible Perovskite Solar Cells by Using HPbI₃ Additive