Wavelength-tunable waveguides based on polycrystalline organic–inorganic perovskite microwires

Wang, Ziyu; Liu, Jingying; Xu, Zai‐Quan; Jiang, Liangcong; Song, Jingchao; Huang, Fuzhi; Wang, Yusheng; Zhong, Yu Lin; Zhang, Yupeng; Cheng, Yi‐Bing; Bao, Qiaoliang

doi:10.1039/c5nr06262d

Cited by 77 publications

(80 citation statements)

References 31 publications

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“…[93] By controlling the halogen elements, perovskite microwires with various dimensions are prepared. The rough perovskite microwires were grown via intercalating the methylammonium iodide (MAI) into the intervals sites of the PbI 6 octahedral cluster.…”

Section: D Perovskite: Nanowires and Nanorodsmentioning

confidence: 99%

Low‐Dimensional Perovskites: From Synthesis to Stability in Perovskite Solar Cells

Yusoff

Nazeeruddin

2017

Advanced Energy Materials

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ruthenium molecular dye, wide absorption range, direct and tunable bandgaps, superior charge carrier mobility, and long carrier diffusion length. [6,[43][44][45] Although it has been synthesized for over 100 years, Mitzi et al. were the first to investigate the electrical properties of tin-based perovskite in 1994, [46] which was later used in numerous devices, including field effect transistors (FETs) and LEDs. [47][48][49] The attention toward metal halide perovskites sparked yet again in 2009, [42] and they were later named one of the most promising emerging technologies in 2016. In brief, metal halide perovskites can be divided into two types based on their crystal structure motif: (i) 3D-structured perovskite (AMX 3 ) and (ii) 2D-structured perovskite (A 2 MX 4 ). The structure of the perovskite could either be 2D or 3D, while the dimensions of the perovskite probably belong to 0D-3D. The term "perovskite" implies to the general class of materials derived from an elemental composition of AMX 3 and demonstrates the crystal structure of perovskite crystal CaTiO 3 , where the divalent metal M resides at the body center and surrounded by six X-anions located at the face centers in an octahedral cluster. The MX 6 in the octahedral cluster may form an extended 3D structure by all-corner-connected type with A-cation sitting at the center. It could also form a 2D perovskite when the 3D perovskite network is cut into one-layer-thick slices along the 〈100〉 direction and separates them apart. In principle, 2D perovskite is the easiest to synthesize because of its natural layered structure, which is held together by weak van der Waals forces. Dou et al. reported the large-scale synthesis of the monolayer (C 4 H 9 NH 3 ) 2 -PbBr 4 by a chemical method. [50] Along the same lines, several groups have prepared and characterized nanomaterials composed of various forms of perovskites. [51][52][53] Also, our group has recently successfully prepared a low-dimensional mixed 2D/3D perovskite using the protonated salt of amino valeric acid iodide (AVAI) as an organic precursor mixed with PbI 2 , in which a yellowish film was containing needle-like crystallite formed. [54] In this topical review, we present the latest advances in the synthesis of low-dimensional perovskites and the growth mechanism to develop a strategy to achieve best performing devices. Later, we focus the instability and a cost-effective solution to circumvent this problem, which is vital for the eventual deployment of perovskite solar cells to consumers market. We present an analysis of the origins for instability in perovskite solar cells, and present a summary of the main achievements and possible future developments of these low-dimensional perovskite. [2,55] Perovskite solar cells have been heralded as one of the most promising emerging technologies in 2016 because of the very high power conversion efficiency of 22% and the low cost of generating electricity compared to even fossil fuels. These are formed with various dimensionalities and can be fully mani...

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Section: D Perovskite: Nanowires and Nanorodsmentioning

confidence: 99%

Low‐Dimensional Perovskites: From Synthesis to Stability in Perovskite Solar Cells

Yusoff

Nazeeruddin

2017

Advanced Energy Materials

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“…Later, Yang and co-workers [32] reported lasing behavior in cesium lead halide perovskite nanowire prepared by a wet-chemistry anion-exchange reaction method. [33] The collection efficiency of a CH 3 NH 3 PbBr 3 microwire integrated into tapered fiber was estimated ≈13-20%, [34] which indicates the potential application in photonic circuits and fiber systems. In addition, 1D micro/ nanowires attract special interests due to their efficient light guiding and collection properties.…”

Section: Polariton Lasingmentioning

confidence: 99%

Strong Exciton–Photon Coupling in Hybrid Inorganic–Organic Perovskite Micro/Nanowires

Zhang

Shang

et al. 2017

Advanced Optical Materials

123

102

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breakthrough in power conversion efficiency of 22.1%, [19] comparable to conventional silicon based solar cell. Wavelength tunable LEDs and optically pumped lasers have been achieved by simply changing the ration of halide anions. However, there are still challenges in electroluminescence with high efficiency and electrically pumped lasers. [20] One intrinsic limitation in perovskite is relatively low exciton binding energy that cannot suppress the exciton ionization in the working condition devices. [21] For example, microwave photoconductance and photoluminescence (PL) study revealed exciton binding energy of 18-32 meV [22,23] in MAPbI 3 , comparable to room temperature thermal energies of K B T ≈ 25 meV. By substitution doping of Cl, larger exciton binding energy of 62.3 ± 8.9 meV can be obtained in perovskite thin film. [24] In MAPbBr 3 quantum dots, exciton binding energy can be as large as 375 meV in comparison to their bulk counterpart of 65 meV. [25] In this regard, low dimensional perovskite single crystals with optical or size confinement are becoming promising in complementing their bulk counterparts. With reduced dimensionality, lead halide perovskite provides a platform where exciton behavior, such as exciton-photon interaction [26,27] and exciton binding energy, [28] can be well modulated, giving the pathway to obtain highly efficient optoelectronic devices.

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“…In recent years, the application of MAPbI 3 micro- and nanowires in optoelectronic devices has increased notably due to the implementation of different preparation methods [8–10]. For example, because of the high sensitivity to visible light, high-photoluminescence (PL) quantum efficiency, long photocarrier diffusion length, and optical gain, perovskite wires have been used in the fabrication of photodetectors [8, 13, 16, 17], lasers [14, 18], and optical waveguides [19]. Moreover, one-dimensional nanowires applied in solar cells showed faster carrier separation and higher lateral conductivity than the bulk MAPbI 3 form [15].…”

Section: Introductionmentioning

confidence: 99%

Evolution of Photoluminescence, Raman, and Structure of CH3NH3PbI3 Perovskite Microwires Under Humidity Exposure

Segovia

Miao

et al. 2018

Nanoscale Res Lett

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Self-assembled organic-inorganic CH3NH3PbI3 perovskite microwires (MWs) upon humidity exposure along several weeks were investigated by photoluminescence (PL) spectroscopy, Raman spectroscopy, and X-ray diffraction (XRD). We show that, in addition to the common perovskite decomposition into PbI2 and the formation of a hydrated phase, humidity induced a gradual PL redshift at the initial weeks that is stabilized for longer exposure (~ 21 nm over the degradation process) and an intensity enhancement. Original perovskite Raman band and XRD reflections slightly shifted upon humidity, indicating defects formation and structure distortion of the MWs crystal lattice. By correlating the PL, Raman, and XRD results, it is believed that the redshift of the MWs PL emission was originated from the structural disorder caused by the incorporation of H2O molecules in the crystal lattice and radiative recombination through moisture-induced subgap trap states. Our study provides insights into the optical and structural response of organic-inorganic perovskite materials upon humidity exposure.Electronic supplementary materialThe online version of this article (10.1186/s11671-018-2470-0) contains supplementary material, which is available to authorized users.

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Wavelength-tunable waveguides based on polycrystalline organic–inorganic perovskite microwires

Cited by 77 publications

References 31 publications

Low‐Dimensional Perovskites: From Synthesis to Stability in Perovskite Solar Cells

Low‐Dimensional Perovskites: From Synthesis to Stability in Perovskite Solar Cells

Strong Exciton–Photon Coupling in Hybrid Inorganic–Organic Perovskite Micro/Nanowires

Evolution of Photoluminescence, Raman, and Structure of CH3NH3PbI3 Perovskite Microwires Under Humidity Exposure

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