High-power bifacial perovskite solar cells with shelf life of over 2000 h

Cheng, Yuanhang; Xie, Chen-Chao; Liu, Xixia; Zhu, Guangshan; Li, Ho-Wa; Venkataraj, Selvaraj; Tan, Zhi‐Kuang; Ding, Liming; Aberle, Armin G.; Lin, Fen

doi:10.1016/j.scib.2020.02.017

Cited by 40 publications

(30 citation statements)

References 21 publications

(20 reference statements)

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“…For ITO‐contact PVSCs, 500 nm sputtered ITO was deposited at room temperature by DC magnetron sputtering at a working pressure of 2.0 × 10 −3 mbar as reported in the previous work. [ 22 ]…”

Section: Methodsmentioning

confidence: 99%

Revealing the Degradation and Self‐Healing Mechanisms in Perovskite Solar Cells by Sub‐Bandgap External Quantum Efficiency Spectroscopy

et al. 2020

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Ion dissociation has been identified to determine the intrinsic stability of perovskite solar cells (PVSCs), but the underlying degradation mechanism is still elusive. Herein, by combining highly sensitive sub‐bandgap external quantum efficiency (s‐EQE) spectroscopy, impedance analysis, and theoretical calculations, the evolution of defect states in PVSCs during the degradation can be monitored. It is found that the degradation of PVSCs can be divided into three steps: 1) dissociation of ions from perovskite lattices, 2) migration of dissociated ions, and 3) consumption of I− by reacting with metal electrode. Importantly, step (3) is found to be crucial as it will accelerate the first two steps and lead to continuous degradation. By replacing the metal with more chemically robust indium tin oxide (ITO), it is found that the dissociated ions under light soaking will only saturate at the perovskite/ITO interface. Importantly, the dissociated ions will subsequently restore to the corresponding vacancies under dark condition to heal the perovskite and photovoltaic performance. Such shuttling of mobile ions without consumption in the ITO‐contact PVSCs results in harvesting–rest–recovery cycles in natural day/night operation. It is envisioned that the mechanism of the intrinsic perovskite material degradation reported here will lead to clearer research directions toward highly stable PVSCs.

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Section: Methodsmentioning

confidence: 99%

Revealing the Degradation and Self‐Healing Mechanisms in Perovskite Solar Cells by Sub‐Bandgap External Quantum Efficiency Spectroscopy

et al. 2020

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“…crystalline silicon cells) [17]. Besides the impressive efficiency, the advantages with low-cost, high specific power, flexibility, and low-temperature solution processing place the PSCs in the vanguard of the third-generation photovoltaic technologies [18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Defect passivation by nontoxic biomaterial yields 21% efficiency perovskite solar cells

Xiong

Hao

Sun

et al. 2021

Journal of Energy Chemistry

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“…Fig. 1 summarizes the widely used encapsulation methods for PVSCs including glass-to-glass encapsulation, polymer layer encapsulation, atomic layer deposition (ALD) encapsulation, and transparent conductive oxides (TCO) encapsulation [14][15][16][17][18][19].…”

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confidence: 99%

“…As shown in Fig. 1e, Cheng et al [18] developed a low-power, room-temperature-sputtered indium tin oxide (ITO) for PVSCs. The device survived even the ITO was sputtered directly onto the top of spiro-OMeTAD organic transporting layer.…”

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confidence: 99%