Highly Efficient Planar Perovskite Solar Cells Via Interfacial Modification with Fullerene Derivatives

Yang, Dong; Li, Wenhua; Zhang, Xuejuan; Xu, Qiaoqing; Liu, Qian; Li, Chun‐Zhu; Bo, Zhishan

doi:10.1002/smll.201503361

Cited by 109 publications

(65 citation statements)

References 35 publications

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“…The above experimental and theoretical discussions emphasize the important role of the electric field inside the cell in determining microscopic charge processes and thus the macroscopic photoelectric behaviors. In this case, there is still a question why the selective contacts can significantly influence the hysteresis behavior, as widely reported . Two reasons may contribute to this result.…”

Section: Resultsmentioning

confidence: 87%

Microscopic Charge Transport and Recombination Processes behind the Photoelectric Hysteresis in Perovskite Solar Cells

Shi

Zhang

et al. 2016

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The microscopic charge transport and recombination processes behind the widely concerned photoelectric hysteresis in the perovskite solar cell have been investigated with both in situ transient photovoltage/photocurrent measurements and the semiconductor device simulation. Time-dependent behaviors of intensity and direction of the photocurrent and photovoltage are observed under the steady-state bias voltages and open-circuit conditions. These charge processes reveal the electric properties of the cell, demonstrating evolutions of both strength and direction of the internal electric field during the hysteresis. Further calculation indicates that this behavior is mainly attributed to both the interfacial doping and defect effects induced by the ion accumulation, which may be the origins for the general hysteresis in this cell.

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Section: Resultsmentioning

confidence: 87%

Microscopic Charge Transport and Recombination Processes behind the Photoelectric Hysteresis in Perovskite Solar Cells

Shi

Zhang

et al. 2016

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“…An energy band diagram can be made referring to the relative energy levels discussed above. Wherein, the energy levels of TiO 2 , P3HT, and Ag were obtained from literatures [20,33,34]. This implies that the charge transfer can successfully occur at the different interfaces for these devices (Fig.…”

Section: Resultsmentioning

confidence: 99%

The preparation of Ag3BiBr6 films and their preliminary use for solution processed photovoltaics

Kou

Liu

et al. 2019

SN Appl. Sci.

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Bismuth-halide-based perovskites could be promising candidates for construction of lead-free and air-stable perovskites solar cells. Herein we report a simple strategy on the fabrication of the Ag 3 BiBr 6 thin films. They were prepared by flexible spin-coating procedure and the solvent of N-butylamine is found to be critical to dissolving AgBr precursor solution under lower room temperatures. Experiment and calculation analysis both reveal it with hexagonal structure. Their physical properties and photovoltaic performance were both characterized. We demonstrate that Ag 3 BiBr 6 films are capable of storing stably over 30 days in air. These results will inspire more research works on developing and applying Ag 3 BiBr 6 beyond solar energy applications.

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“…Materials : The titanium isopropoxide (TTIP) (97%) was from Alfa Aesar. The PCBA was obtained according to article . Lead iodide (PbI 2 ), and lead bromide (PbBr 2 ) were purchased from Sigma‐Aldrich (99.9985%); methylammonium iodide (MAI) and formamidinium iodide (FAI) were purchased from Shanghai Materwin New Materials Co., Ltd. N , N ‐Dimethylformamide (DMF), chlorobenzene (CB) polystyrene, and dimethylsulfoxide (DMSO) were from Alfar Aesar.…”

Section: Methodsmentioning

confidence: 99%

A Simple Way to Simultaneously Release the Interface Stress and Realize the Inner Encapsulation for Highly Efficient and Stable Perovskite Solar Cells

Cui

et al. 2019

Adv Funct Materials

103

108

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The mixed halide perovskites have become famous for their outstanding photoelectric conversion efficiency among new-generation solar cells. Unfortunately, for perovskites, little effort is focused on stress engineering, which should be emphasized for highly efficient solar cells like GaAs. Herein, polystyrene (PS) is introduced into the perovskite solar cells as the buffer layer between the SnO 2 and perovskite, which can release the residual stress in the perovskite during annealing because of its low glass transition temperature. The stress-free perovskite has less recombination, larger lattices, and a lower ion migration tendency, which significantly improves the cell's efficiency and device stability. Furthermore, the so-called inner-encapsulated perovskite solar cells are fabricated with another PS capping layer on the top of perovskite. As high as a 21.89% photoelectric conversion efficiency (PCE) with a steady-state PCE of 21.5% is achieved, suggesting that the stress-free cell can retain almost 97% of its initial efficiency after 5 days of "day cycle" stability testing.

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Highly Efficient Planar Perovskite Solar Cells Via Interfacial Modification with Fullerene Derivatives

Cited by 109 publications

References 35 publications

Microscopic Charge Transport and Recombination Processes behind the Photoelectric Hysteresis in Perovskite Solar Cells

Microscopic Charge Transport and Recombination Processes behind the Photoelectric Hysteresis in Perovskite Solar Cells

The preparation of Ag3BiBr6 films and their preliminary use for solution processed photovoltaics

A Simple Way to Simultaneously Release the Interface Stress and Realize the Inner Encapsulation for Highly Efficient and Stable Perovskite Solar Cells

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