Revealing Electrical‐Poling‐Induced Polarization Potential in Hybrid Perovskite Photodetectors

Lan, Chuntao; Zou, Haiyang; Wang, Long; Zhang, Meng; Pan, Shuang; Ma, Ying; Qiu, Yiping; Wang, Zhong Lin; Lin, Zhiqun

doi:10.1002/adma.202005481

Cited by 24 publications

(34 citation statements)

References 44 publications

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“…Some reports showed the phenomenon of current amplification in photodetectors and attributed the cause of this phenomenon to ion migration. [91][92][93] Light induced ions migrate from the working region to the electrode; thus the working region body defects are reduced and the dark current is decreased. In addition, the ions' migration and accumulating at the interface induces charge injection, to amplify the current.…”

Section: Other Applicationsmentioning

confidence: 99%

Ion Migration in Organic–Inorganic Hybrid Perovskite Solar Cells: Current Understanding and Perspectives

Zhu

Wang

Zhang

et al. 2022

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shown that ion migration is an inherent property of perovskite. [8][9][10][11] When discussing perovskites, due to their soft lattice feature, weak chemical bonds and low defect formation energy are generally considered. For the ABX 3 perovskites, A-site ions (methylamium ions (MA + ) and formamidium ions (FA + )), B-site ions (lead ions (Pb 2+ ) and tin ions (Sn 2+ )), and X-site ions (iodide ions (I − ), bromide ions (Br − ), chloride ions (Cl − ), and other halogen ions) have low activation barrier and high diffusion coefficient. [3] These ionic defects within the lattice are easily activated to cause severe ion migration in the perovskite films under external factors. In fact, in addition to the internal ions of perovskite, ions introduced from the ambient atmosphere also have the potential to migrate. [12] To detect the effects of ion migration, abnormal phenomenon in perovskite were given attention. Snaith et al. first reported the abnormal photocurrent-voltage hysteresis phenomenon, which was that forward and reverse scan J-V curves can't overlap in PSCs. [13] Electric field-driven ion migration was considered to be the key factor to affect photocurrent hysteresis. Xiao et al. [14] reported the switchable photovoltaic effect in a plane heterojunction structure with symmetric electrodes, in which the current direction could be completely overturned. Ion migration was speculated to be the main cause. The reason for this inference is that the migration as well as the accumulation of ions can change the intrinsic electric field of the perovskite films, even causing local crystal structure changes, which in turn lead to further degradation of the PSCs and severely affect the operating stability. [15,16] Apart from these, ion migration can also cause slow photoconductivity response, halide redistribution, and segregation. [17] In order to push the commercialization step of PSCs, a clear understanding of the ion migration in OIHPs is meaningful and highly desired. Although some reports have reviewed the ion migration in OIHPs, [18][19][20] the explanation of the mechanisms behind ion migration is still incomplete and is usually introduced directly from theoretical calculations. Meanwhile, more reviews only focused on the ion migration in PSCs; ion migration in fact has profound implications for many other applications of perovskite materials, like photodetector, light emitting diodes, and random access memories. The use of low-dimensional materials to inhibit ion migration is an effective strategy, but the various species involved are not discussed in detail. What's more, the study of ion migration is quickly Organic-inorganic hybrid perovskite (OIHPs) solar cells are the most promising alternatives to traditional silicon solar cells, with a certified power conversion efficiency beyond 25%. However, the poor stability of OHIPs is one of the thorniest obstacles that hinder its commercial development. Among all the factors affecting stability, ion migration is prominent because it is unavoidable and intrinsic in OH...

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Section: Other Applicationsmentioning

confidence: 99%

Ion Migration in Organic–Inorganic Hybrid Perovskite Solar Cells: Current Understanding and Perspectives

Zhu

Wang

Zhang

et al. 2022

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“…Further, electric field induced ion migration primarily across perovskite grain boundaries further enhances material degradation, eventually worsening optoelectronic properties. 61 However, at the same time, the C-AFM and PC-AFM studies carried out by Li et al in MAPbI 3 /CdS heterojunction PD indicated that the short transport distance at the grain boundaries acted as preferential spots of charge carrier transportation and exciton separation. 62 The study of the photoelectric mechanism at nanoscale showed that higher photocurrent values are observed at grain edges.…”

Section: P-n (Or P-i-n) Junction-based Pdsmentioning

confidence: 98%

Organolead halide perovskites beyond solar cells: self-powered devices and the associated progress and challenges

2021

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“…The MASP strategy was also used in other areas and shows great potential. [95][96][97][98] Lin et al made perovskite films with large grains, yielding a 17.51% PCE.…”

Section: Meniscus-assisted Solution-printingmentioning

confidence: 99%

Large‐Area Blade‐Coated Solar Cells: Advances and Perspectives

Xiao

Zuo

Zhong

et al. 2021

Advanced Energy Materials

100

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the representative of the third-generation photovoltaics, have attracted great attention owing to unique properties such as light weight, flexibility, low cost, and low-temperature solution process. PCE of OSCs has been greatly improved via continuous development of novel semiconducting materials and performance optimization in the past two decades. [3][4][5] Lead halide perovskites, as star semiconducting materials, have obtained enormous attention in optoelectronic fields due to their outstanding properties, such as, tunable band gaps, high absorption coefficient, high charge carrier mobility, and long carrier diffusion lengths. [6][7][8][9][10][11] Until 2021, PCEs of perovskite/silicon tandem cells and OSCs have exceeded 29% and 18%, respectively. [12][13][14] However, the high-efficiency cells are usually prepared by spin-coating, with an active area of less than 0.1 cm 2 . There is no doubt that the development of OSCs and PSCs will go to large-scale industrial production, thus the challenge is achieving large-area uniform active layers. However, due to the uneven centrifugal force in the traditional spin-coating process, the thicknesses at the center and the edge of the substrate is different, especially for large-area films. The thick area shows increased nonradiative recombination loss. The thin area shows reduced lightharvesting ability and increased pinholes, leading to reduced efficiency. To address these issues, developing large-area coating methods is an effective way. [15] So far, various methods have been applied to large-area film fabrication, including spray coating, [16][17][18][19] dip coating, [20,21] slot-die coating, [22,23] and bladecoating. Among these techniques, blade-coating has achieved the greatest success, with the best PCE of ≈22%.In this review, we summarize the recent advances of bladecoating techniques for fabricating large-area PSCs and OSCs, and analyze the issues that need to be solved in blade-coating technology. We hope it can provide new strategies for the commercialization of the third-generation solar cells. Blade-Coating TechnologyBlade-coating is a widely recognized method for the preparation of large-area films. Blade-coating method, with the merits of efficient material utilization, in situ crystallization and adjustable parameters, has been investigated in depth for the preparation of various thin films. [15] Figure 1 demonstrates the High-efficiency perovskite solar cells (PSCs) and organic solar cells (OSCs) are promising alternatives for silicon-based solar cells. At present, the key point for commercialization of PSCs and OSCs is realizing large-scale production while maintaining the same high efficiency as small-area ones. In this review, the blade-coating method for preparing large-area films is introduced first and the recent advances of blade-coated OSCs and PSCs are summarized. Then, the effects of blading parameters on the crystal growth and film formation of the light-harvesting materials are discussed. Moreover, the limitations and advantages of making h...

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Revealing Electrical‐Poling‐Induced Polarization Potential in Hybrid Perovskite Photodetectors

Cited by 24 publications

References 44 publications

Ion Migration in Organic–Inorganic Hybrid Perovskite Solar Cells: Current Understanding and Perspectives

Ion Migration in Organic–Inorganic Hybrid Perovskite Solar Cells: Current Understanding and Perspectives

Organolead halide perovskites beyond solar cells: self-powered devices and the associated progress and challenges

Large‐Area Blade‐Coated Solar Cells: Advances and Perspectives

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