Excess PbI2 evolution for triple-cation based perovskite solar cells with 21.9% efficiency

Zhu, Mingshan; Huang, Dejun; Liu, Qianyu; Yan, Guangyuan; Zheng, Xiaodong; Dong, Chen; Zhao, Jiaxuan; Xiang, Yan; Peng, Changtao; Li, Haijin; Zhang, Meng; Zhang, Wenfeng; Duan, Lianfeng; Huang, Yuelong

doi:10.1016/j.jechem.2021.07.030

Cited by 56 publications

(48 citation statements)

References 39 publications

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“…70 The addition of an excess amount of PbI 2 to perovskite precursors has also been considered to be a possible approach for increasing V OC , due to its passivation effect at grain boundaries. 71,72 This effect is also promising for an inverted structure. Recently, Wu et al added 5 mol% extra PbI 2 to the FAPbI 3 perovskite precursor, which resulted in better performance in the inverted structure owing to the increase in V OC .…”

Section: Organic–inorganic Hybrid Perovskite Solar Cellsmentioning

confidence: 97%

The high open-circuit voltage of perovskite solar cells: a review

Guo

Jena

Kim

et al. 2022

Energy Environ. Sci.

248

163

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Section: Organic–inorganic Hybrid Perovskite Solar Cellsmentioning

confidence: 97%

The high open-circuit voltage of perovskite solar cells: a review

Guo

Jena

Kim

et al. 2022

Energy Environ. Sci.

248

163

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“…In this preparation process, Excessive PbI 2 on the surface will passivate the defects of perovskite films, resulting in greatly improved performance of PSCs prepared under both conditions of glove box and ambient air (35% humidity). [24] Compared with the traditional high-performance flexible perovskite material (FAPbI 3 ) 1-x (MAPbBr 3 ) x , f-PSCs based on Cs 0.05 (FA 0.85 MA 0.15 ) 0.95 Pb(I 0.8 Br 0.15 Cl 0.1 ) 3 have excellent mechanical bending durability. [25] To verify the VTMES is evenly coated on the surface of perovskite layer, energy dispersive spectroscopy (EDS) is analyzed.…”

Section: Resultsmentioning

confidence: 99%

“…[27,28] A small amount of excessive PbI 2 can passivate defects, which is conducive to improving the quality of perovskite films. [24] However, too much quantity of PbI 2 would restrain grain growth of perovskite, thus leading to grain boundary defects and inferior stability. Figure 2a demonstrates that when the concentration of VTMES is 3 mg mL −1 , perovskite film shows the highest (220) peak and lowest PbI 2 peak, revealing that 3 mg mL −1 is the optimal concentration, and subsequent test results are based on the control and optimal concentration VTMES modified devices or films.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Bending Resistance and Efficiency of Flexible PSCs Derived from Self‐Healing and Passivation Double Function of a Silane Coupling Agent

Lei

Liu

et al. 2022

Adv Materials Inter

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Flexible perovskite solar cells (f‐PSCs) show promising applications because of their lightweight and flexible properties. However, f‐PSCs still suffer from low efficiencies and poor stabilities. Here, vinyl tri (2‐methoxyethoxy) silane (VTMES) is introduced between perovskite and hole transport layer. The oxydic silane coupling agent effectively suppresses PbI2 formation in perovskite by forming PbO bonding, which greatly improves perovskite phase. Kelvin probe force microscopy (KPFM) results demonstrate that p‐type doping is formed in the modified device, which effectively inhibits carrier recombination. The silane coupling agent plays double role in the devices. On one hand, it greatly improves the bending resistance of f‐PSCs due to its excellent self‐healing properties, on the other hand, it obviously suppresses defects and restrains carrier recombination of the devices by facilitating perovskite grain growth. As a result, f‐PSCs with a champion efficiency of 17.01% increased from 15.28% are achieved with high reproducibility. Meanwhile, f‐PSCs present robust bending resistance. Optimal modified devices can maintain 92% of their initial efficiency after 3000 bending cycles, while the control one can only remain 55%. This work paves a new path for f‐PSCs to improve photovoltaic properties and bending resistance by oxydic silane coupling agents.

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“…This method could retain a small amount of PbI 2 within 3D mesoporous structure in the recovered perovskite layer, which promotes the growth rate of the perovskite and improves the PCE of the device. [ 171,172 ] Interestingly, compared with a PCE of 14.35% for the original PSCs, the device based on the in situ recovery of PbI 2 showed a higher PCE of 14.84%. Jena et al.…”

Section: Sustainable Pb Recycling Managementmentioning

confidence: 99%

Sustainable Pb Management in Perovskite Solar Cells toward Eco‐Friendly Development

Luo

et al. 2022

Advanced Energy Materials

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of human society. Clean and green solar energy could be converted into electric energy through photovoltaic technologies. This can provide a green and sustainable way for energy utilization. [1][2][3] Inorganicorganic hybrid perovskite solar cells (PSCs) are considered to be one of the most promising photovoltaic applications, [4][5][6][7][8][9][10][11] owing to the favorable properties of perovskite materials, such as tunable bandgap, high absorption coefficient, large bipolar mobility, long carrier diffusion length, small exciton binding energy and high defect tolerance. [12][13][14][15][16][17][18] The best power conversion efficiency (PCE) of PSCs has reached 25.7% based on Pb-based perovskites, which has exceeded that of monocrystalline silicon solar cells and exhibited huge a market prospect. [19] However, these perovskite films are prone to be decomposed into the toxic heavy-metal compounds of PbI 2 , Pb, or PbO, etc. because of the uncontrollable environmental condition, including high temperature, high humidity, and strong sunlight. [20,21] The toxicity of Pb leaking from perovskite film has become one of the main obstacles toward commercialization. [22] There have been extensive endeavors to replace Pb with Sn to make the perovskite active layer less toxic, however, Sn-based PSCs demonstrate inferior efficiency and stability compared with their Pb-based counterparts. Thus, the Pb-based perovskites are still indispensable for guaranteeing excellent photoelectric properties and would be the main force of future large-scale applications.The photovoltaic market has been growing rapidly for alleviating energy scarcity and mitigating climate change. The cumulative solar capacity in 2020 reaches ≈773.2 GW around the world. [23] If 20% of this solar capacity is occupied by perovskite solar panels with 500 nm Pb-based perovskite film and ≈20% PCE, 541.24 tons of Pb would be consumed considering ≈0.70 g m −2 of Pb content. [24,25] The widespread deployment of PSCs would provoke a terrible environmental pollution without proper Pb management. World Health Organization (WHO) and many countries have reached a broad consensus on the restriction of the Pb pollution and established strict environmental standards on the Pb usage. Besides, international organizations such as the European Union have also formulated relevant regulations for the management and regulation of waste electrical and electronic equipment, requiring producers to take responsibility for collecting and recycling apparatus waste. [26] Therefore, sustainable Pb management is an essential prerequisite for the commercialization of PSCs. Pb-based perovskite solar cells (PSCs) as one of the most promising photovoltaic technologies for commercialization have attracted tremendous attention in recent years. However, the toxicity and leakage of heavy metal Pb from perovskite film have become critical obstacles for eco-friendly development. Extreme weather conditions such as heavy rain, high temperature, or strong sunlight may accelerate the undesired decomp...

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Excess PbI2 evolution for triple-cation based perovskite solar cells with 21.9% efficiency

Cited by 56 publications

References 39 publications

The high open-circuit voltage of perovskite solar cells: a review

The high open-circuit voltage of perovskite solar cells: a review

Enhanced Bending Resistance and Efficiency of Flexible PSCs Derived from Self‐Healing and Passivation Double Function of a Silane Coupling Agent

Sustainable Pb Management in Perovskite Solar Cells toward Eco‐Friendly Development

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