Passivated Single-Crystalline CH3NH3PbI3 Nanowire Photodetector with High Detectivity and Polarization Sensitivity

Gao, Liang; Zeng, Kai; Guo, Jingshu; Ge, Cong; Du, Jing; Zhao, Yang; Chao, Chen; Deng, Hui; He, Ying; Song, Haisheng; Niu, Guangda; Tang, Jiang

doi:10.1021/acs.nanolett.6b03119

Cited by 328 publications

(308 citation statements)

References 45 publications

(77 reference statements)

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“…Special micromorphologies such as 2D nanoplates, 1D NWs, 0D nanocrystals, nanonets, and inverse opals‐type structures have been carefully studied and showed superior optical properties and excellent electrical characteristics 52, 53, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65. These structures will be discussed in detail in the following sections.…”

Section: Factors Influencing Photodetectors Performancesmentioning

confidence: 99%

Photodetectors Based on Organic–Inorganic Hybrid Lead Halide Perovskites

2017

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Recent years have witnessed skyrocketing research achievements in organic–inorganic hybrid lead halide perovskites (OIHPs) in the photovoltaic field. In addition to photovoltaics, more and more studies have focused on OIHPs‐based photodetectors in the past two years, due to the remarkable optoelectronic properties of OIHPs. This article summarizes the latest progress in this research field. To begin with, the factors influencing the performance of photodetectors are discussed, including both internal and external factors. In particular, the channel width and the incident power intensities should be taken into account to precisely and objectively evaluate and compare the output performance of different photodetectors. Next, photodetectors fabricated on single‐component perovskites in terms of different micromorphologies are discussed, namely, 3D thin‐film and single crystalline, 2D nanoplates, 1D nanowires, and 0D nanocrystals, respectively. Then, bilayer structured perovskite‐based photodetectors incorporating inorganic and organic semiconductors are discussed to improve the optoelectronic performance of their pristine counterparts. Additionally, flexible OIHPs‐based photodetectors are highlighted. Finally, a brief conclusion and outlook is given on the progress and challenges in the field of perovskites‐based photodetectors.

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Section: Factors Influencing Photodetectors Performancesmentioning

confidence: 99%

Photodetectors Based on Organic–Inorganic Hybrid Lead Halide Perovskites

2017

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“…However, owing to large specific surface area, defect‐free single crystal and high crystal quality. Photodetectors composed of nanowires and nanorods have higher response speed than those of the conventional single crystal photodetectors . Until now, several research groups obtained the μs‐level response speed using nanowire or nanorod structures respectively.…”

Section: Photoconductive Photodetectorsmentioning

confidence: 99%

Recent advances on organic‐inorganic hybrid perovskite photodetectors with fast response

Yan

Shen

2019

InfoMat

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In the last decade, optoelectronic devices based on organic‐inorganic hybrid perovskite (OIHP) materials, which have unique advantages of direct bandgap, large absorption coefficient, low density of defects, long charge carrier lifetime, diffusion length, and solution processability, have traveled with traditional inorganic semiconductor devices. The state‐of‐the‐art OIHP photodetectors have contributed a comparable performance with Si and III‐V compound semiconductor based photodetectors. Large amount of efforts have been focused on improving sensitivity, broadening detection spectra, enlarging linear dynamic range. However, few reports emphasized the important parameter of response speed. In this review, we summarize the progress and applications of OIHP photodetectors with fast response. Based on photovoltaic and photoconductive‐type OIHP photodetectors, the working principle and key factors on determining response speed are systematically mentioned. Then, the research progress of response speed, which is composed of resistance‐capacitance (RC) time constant and charge carrier transit time is discussed in detail. Subsequently, considering the intrinsic flexibility of perovskite materials, we briefly discuss the flexible photodetectors. Finally, an outlook and potential rules for designing fast‐response OIHP photodetectors are further proposed.

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“…Polarz et al 26 developed metal–organic porous single-crystalline MAPbI 3 and also did not observe the (10) spots. Furthermore, Tang et al 27 , Vela et al 28 , and Zhu et al 29 found that the {110} spots were missing in MAPbI 3 nanowires. Segawa 30 explained that the (110) and (10) diffraction spots are inherently difficult to be detected experimentally due to the low ED intensity of organic–inorganic halide compounds.…”

Section: Introductionmentioning

confidence: 99%

Atomic scale insights into structure instability and decomposition pathway of methylammonium lead iodide perovskite

et al. 2018

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Organic–inorganic hybrid perovskites are promising candidates for the next-generation solar cells. Many efforts have been made to study their structures in the search for a better mechanistic understanding to guide the materials optimization. Here, we investigate the structure instability of the single-crystalline CH3NH3PbI3 (MAPbI3) film by using transmission electron microscopy. We find that MAPbI3 is very sensitive to the electron beam illumination and rapidly decomposes into the hexagonal PbI2. We propose a decomposition pathway, initiated with the loss of iodine ions, resulting in eventual collapse of perovskite structure and its decomposition into PbI2. These findings impose important question on the interpretation of experimental data based on electron diffraction and highlight the need to circumvent material decomposition in future electron microscopy studies. The structural evolution during decomposition process also sheds light on the structure instability of organic–inorganic hybrid perovskites in solar cell applications.

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Passivated Single-Crystalline CH₃NH₃PbI₃ Nanowire Photodetector with High Detectivity and Polarization Sensitivity

Cited by 328 publications

References 45 publications

Photodetectors Based on Organic–Inorganic Hybrid Lead Halide Perovskites

Photodetectors Based on Organic–Inorganic Hybrid Lead Halide Perovskites

Recent advances on organic‐inorganic hybrid perovskite photodetectors with fast response

Atomic scale insights into structure instability and decomposition pathway of methylammonium lead iodide perovskite

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