Efficient perovskite solar cells by hybrid perovskites incorporated with heterovalent neodymium cations

Wang, Kai; Zheng, Luyao; Zhu, Tao; Yao, Xiang; Yi, Chao; Zhang, Xiaotao; Cao, Yu; Liu, Lei; Hu, Wenping; Gong, Xiong

doi:10.1016/j.nanoen.2019.04.073

Cited by 98 publications

(99 citation statements)

References 51 publications

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“…This stimulated research efforts into HOIPs for optoelectronic applications. Specifically, HOIPs solar cells have achieved remarkable performance 3c,5. Ferroelectricity has been proposed as a common thread connecting HOIPs properties such as current–voltage hysteresis, twin domain structure, and optical nonlinearity .…”

Section: Introductionmentioning

confidence: 99%

Light‐Ferroic Interaction in Hybrid Organic–Inorganic Perovskites

Liu

Ievlev

Collins

et al. 2019

Advanced Optical Materials

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Given the remarkable performance of hybrid organic–inorganic perovskites (HOIPs) in solar cells, light emitters, and photodetectors, the quest to advance the fundamental understanding of the photophysical properties in this class of materials remains highly relevant. Recently, the discovery of ferroic twin domains in HOIPs has renewed the debate of the ferroic effects on optoelectric processes. This work explores the interaction between light and ferroic twin domains in CH3NH3PbI3. Due to strain and chemical inhomogeneities, photogenerated electrons and holes show a preferential motion in the ferroelastic twin domains. Density functional theory (DFT) shows that electrons and holes result in lattice expansion in CH3NH3PbI3 differently. Hence, light generates strain in the ferroelastic domains due to preferential photocarrier motion, leading to a screening of strain variation. X‐ray diffraction studies verify the DFT simulations and reveal that the photoinduced strain is light intensity dependent, and the photoexcitation is a prerequisite of inducing strain by light. This work extends the fundamental understanding of light‐ferroic interaction and offers guidance for developing functional devices.

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Section: Introductionmentioning

confidence: 99%

Light‐Ferroic Interaction in Hybrid Organic–Inorganic Perovskites

Liu

Ievlev

Collins

et al. 2019

Advanced Optical Materials

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“…For the CH 3 NH 3 PbI 3 : x Nd 3+ ( x = 0.5 mol %) thin film, the partial substitution of Pb 2+ by Nd 3+ was confirmed by the binding energy shifts of N 1s, I 3d, and Pb 4f in X-ray photoelectron spectroscopies (XPS) of pristine CH 3 NH 3 PbI 3 and CH 3 NH 3 PbI 3 : x Nd 3+ thin films. 17 Thin film characteristics including the crystal structure, film morphology, charge carrier mobility, and trap density were reported in our previous publication. 17…”

Section: Resultsmentioning

confidence: 94%

“…17 We further demonstrated highly reproducible power conversion efficiency from inverted planar heterojunction perovskite solar cells by the Nd 3+ -doped perovskite as the photoactive layer. 17…”

Section: Introductionmentioning

confidence: 86%

Solution-Processed Ultrahigh Detectivity Photodetectors by Hybrid Perovskite Incorporated with Heterovalent Neodymium Cations

et al. 2019

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Hybrid perovskite materials have drawn a remarkable attention for approaching high-performance photovoltaics owing to their superior optoelectronic properties. But most of research studies focused on the pristine hybrid perovskite CH3NH3PbI3. In this study, we utilize a newly developed CH3NH3PbI3:xNd3+ (x = 0.5 mol %) thin film, where Pb2+ is partially substituted by a heterovalent Nd3+ cation, as the photoactive layer for solution-processed perovskite photodetectors. It is found that the resultant CH3NH3PbI3:xNd3+ (x = 0.5 mol %) thin film possesses superior thin film morphology, enhanced and balanced charge carrier mobilities, and suppressed trap density, resulting in enhanced photocurrent and reduced dark current for perovskite photodetectors by the CH3NH3PbI3:xNd3+ (x = 0.5 mol %) thin film. Thus, operated at room temperature, solution-processed perovskite photodetectors exhibit over 1014 cm Hz1/2 W–1 photodetectivity in a spectrum range from 350 to 800 nm, a linear dynamic range over 100 dB, and fast response time. All these results indicate that high-performance solution-processed perovskite photodetectors can be realized by novel hybrid perovskite materials, where Pb2+ is partially substituted by heterovalent Nd3+ cations.

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“…Finally, the device performance was greatly optimized, and the conversion efficiency was 19.1% . By partially replacing Pb 2+ with Nd 3+ , Wang et al significantly improved the film quality, greatly reduced the defect states, significantly increased the carrier life, significantly improved the charge mobility, and significantly optimized the device performance, achieving a conversion efficiency of 21.15% (Figure b,c) . Using In 3+ to partially replace Pb 2+ , Wang et al improved the crystallization of perovskite thin films (Figure d,e).…”

Section: Pb‐site Doping In Organic–inorganic Lead Halidementioning

confidence: 99%

Section: Pb‐site Doping In Organic–inorganic Lead Halidementioning

confidence: 99%

Pb‐Site Doping of Lead Halide Perovskites for Efficient Solar Cells

et al. 2019

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Although great success has been achieved in perovskite solar cells (PSCs), it still suffers from several drawbacks in terms of stability and higher efficiency. Doping as an effective method to modify the optical and electronic properties of the materials is extensively studied in lead halide perovskites (LHPs). Herein, Pb‐site doping in organic–inorganic hybrid perovskites (OIH‐LHPs) and inorganic CsPbX3‐based materials is discussed. Doping has three functions toward PSCs: participating in the crystalline process, modifying the energy states in LHPs, and contributing to the stability of PSCs. Issues about further improvements are raised, and perspectives for further investigation are presented.

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Efficient perovskite solar cells by hybrid perovskites incorporated with heterovalent neodymium cations

Cited by 98 publications

References 51 publications

Light‐Ferroic Interaction in Hybrid Organic–Inorganic Perovskites

Light‐Ferroic Interaction in Hybrid Organic–Inorganic Perovskites

Solution-Processed Ultrahigh Detectivity Photodetectors by Hybrid Perovskite Incorporated with Heterovalent Neodymium Cations

Pb‐Site Doping of Lead Halide Perovskites for Efficient Solar Cells

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