Optical features of PbBr2 semiconductor thin films for radiation attenuation application

Torres, O. G.; Gordillo, G.; Plazas, María Cristina; Téllez, D.A. Landı́nez; Roa-Rojas, J.

doi:10.1007/s10854-021-06257-y

Cited by 9 publications

(7 citation statements)

References 37 publications

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“…The peaks at 15.2, 21.7, 26.5, 30.6, 34.4, and 37.7° correspond to (100), (110), (111), (200), (210), and (211) diffraction planes, respectively (PDF #54e0752) . A small peak was found at 24.7°, it may be due to the pure PbBr 2 phase. , From the XRD results, it was confirmed that the cubic phase formation of CsPbBr 3 occurred on both types of ETL, AZO, and m-TiO 2 . A 3D model of the cubic phase of the perovskite structure along with different peak positions is shown in Figure c.…”

Section: Resultsmentioning

confidence: 87%

Low-Temperature and Ambient Processed All Inorganic CsPbBr₃ Perovskite Solar Cells: Stability Enhancement with AZO as an Electron Transport Layer

Das,

Rana,

Garg

et al. 2023

J. Phys. Chem. C

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All inorganic CsPbBr3-based perovskite solar cells (PSCs) have drawn great attention from researchers because of their high chemical and thermal stability in an open environment. In this work, we successfully replaced the high-temperature deposited mesoporous caping (m-TiO2) electron transport layer (ETL) with a low-temperature deposited aluminum-doped zinc oxide (AZO) ETL and fabricated all inorganic CsPbBr3 PSCs using copper(I) thiocyanate (CuSCN) as a hole transport layer (HTL). The fabricated AZO-based devices exhibited an excellent power conversion efficiency (PCE) of 6.42%, fill factor (FF) of 60.32%, open-circuit voltage (V OC) of 1.01 V, and short-circuit current density (J SC) of 10.38 mA/cm2, whereas m-TiO2-based devices exhibited PCE of 5.33%, FF of 62.88%, V OC of 1.02 V, and J SC of 8.39 mA/cm2 under ambient conditions. In terms of stability, the AZO-based device retained 94% of its initial PCE, whereas the m-TiO2-based device retained 69% of its initial PCE after 1000 h of continuous exposure in the ambient atmosphere of relative humidity ∼81% and room temperature (RT) ∼27 °C without any encapsulation. Therefore, this approach of replacing m-TiO2 with AZO can facilitate the fabrication of efficient and highly stable planar all-inorganic PSCs in an ambient environment. In addition, we represented a cheap encapsulation process for improved stability as an additional advantage.

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Section: Resultsmentioning

confidence: 87%

Low-Temperature and Ambient Processed All Inorganic CsPbBr₃ Perovskite Solar Cells: Stability Enhancement with AZO as an Electron Transport Layer

Das,

Rana,

Garg

et al. 2023

J. Phys. Chem. C

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“…A retention of phase and structure, with a slight shift to higher 2θ values (see Figure 3 inset), was observed for the aq SA PQDs. The detailed comparison as shown in Figure S10 indicates a small peak at 23.3°, which could be assigned to PbBr 2 44 for the plane (200), and we believe that the surface etching caused during ligand exchange (wherein reconstruction of surface atoms occurs) may have resulted in this PbBr 2 , which is slightly soluble in water. The crystallite size calculated as per Scherrer's equation 45 shows a slight reduction in crystallite size from 8.7 to 8.3 nm after phase transfer.…”

Section: Resultsmentioning

confidence: 95%

Aqueous, Non-Polymer-Based Perovskite Quantum Dots for Bioimaging: Conserving Fluorescence and Long-Term Stability via Simple and Robust Synthesis

Sanjayan

Shivanna

Schiffman

et al. 2022

ACS Appl. Mater. Interfaces

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Perovskite quantum dots (PQDs) offer high photoluminescence quantum yields; however, due to their limited stability in aqueous media, to date their utilization in biomedical applications has been limited. The present work demonstrates highly fluorescent and stable aqueous PQDs that were synthesized using a facile engineered phase transfer method. Ligands were engineered to have a dual functionality, i.e., they could simultaneously mediate the strong binding of PQDs and the interactions with water molecules. The resultant water-soluble PQDs demonstrated robust structural and optical properties. The extracted aqueous PQDs remained stable in pellet form for 8 months, which was the entire test duration. Notably, 100% of their fluorescence was also retained. As a proof-of-concept experiment, the water-soluble PQDs were successfully tagged to polyclonal antibodies and used to image Escherichia coli cells in aqueous media. No structural or optical disturbance in PQDs was detected throughout the process. This work marks the beginning of the use of nonpolymeric aqueous PQDs and shows their strong potential to be used in biological applications.

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“…were ascribed to the (100) and (200) lattice planes. The peak located at ∼12° should be from PbBr 2 and can be ascribed to the (011) lattice planes, while other small diffraction peaks can be indexed to the (210), (211), (300), (310), and (222) lattice planes of single-crystal MAPbBr 3 . − Figure d gives the photoluminescence (PL) spectrum and optical absorption spectrum of the NW array. The sharp PL peak is located at 533 nm with a full-width-at-half-maximum (FWHM) of 22.13 nm.…”

Section: Resultsmentioning

confidence: 99%

Template-Assisted Synthesis of a Large-Area Ordered Perovskite Nanowire Array for a High-Performance Photodetector

Huang

Ziółek

et al. 2023

ACS Appl. Mater. Interfaces

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One-dimensional (1D) organic–inorganic hybrid perovskite nanowires (NWs) with well-defined structures possess superior optical and electrical properties for optoelectronic applications. However, most of the perovskite NWs are synthesized in air, which makes the NWs susceptible to water vapor, resulting in large amounts of grain boundaries or surface defects. Here, a template-assisted antisolvent crystallization (TAAC) method is designed to fabricate CH3NH3PbBr3 NWs and arrays. It is found that the as-synthesized NW array has designable shapes, low crystal defects, and ordered alignment, which is attributed to the sequestration of water and oxygen in air by the introduction of acetonitrile vapor. The photodetector based on the NWs exhibits an excellent response to light illumination. Under the illumination of a 532 nm laser with 0.1 μW and a bias of −1 V, the responsivity and detectivity of the device reach 1.55 A/W and 1.21 × 1012 Jones, respectively. The transient absorption spectrum (TAS) shows a distinct ground state bleaching signal only at 527 nm, which corresponds to the absorption peak induced by the interband transition of CH3NH3PbBr3. Narrow absorption peaks (a few nanometers) indicate that the energy-level structures of CH3NH3PbBr3 NWs only have a few impurity-level-induced transitions leading to additional optical loss. This work provides an effective and simple strategy to achieve high-quality CH3NH3PbBr3 NWs, which exhibit potential application in photodetection.

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Optical features of PbBr2 semiconductor thin films for radiation attenuation application

Cited by 9 publications

References 37 publications

Low-Temperature and Ambient Processed All Inorganic CsPbBr₃ Perovskite Solar Cells: Stability Enhancement with AZO as an Electron Transport Layer

Low-Temperature and Ambient Processed All Inorganic CsPbBr₃ Perovskite Solar Cells: Stability Enhancement with AZO as an Electron Transport Layer

Aqueous, Non-Polymer-Based Perovskite Quantum Dots for Bioimaging: Conserving Fluorescence and Long-Term Stability via Simple and Robust Synthesis

Template-Assisted Synthesis of a Large-Area Ordered Perovskite Nanowire Array for a High-Performance Photodetector

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Optical features of PbBr2 semiconductor thin films for radiation attenuation application

Cited by 9 publications

References 37 publications

Low-Temperature and Ambient Processed All Inorganic CsPbBr3 Perovskite Solar Cells: Stability Enhancement with AZO as an Electron Transport Layer

Low-Temperature and Ambient Processed All Inorganic CsPbBr3 Perovskite Solar Cells: Stability Enhancement with AZO as an Electron Transport Layer

Aqueous, Non-Polymer-Based Perovskite Quantum Dots for Bioimaging: Conserving Fluorescence and Long-Term Stability via Simple and Robust Synthesis

Template-Assisted Synthesis of a Large-Area Ordered Perovskite Nanowire Array for a High-Performance Photodetector

Contact Info

Product

Resources

About

Low-Temperature and Ambient Processed All Inorganic CsPbBr₃ Perovskite Solar Cells: Stability Enhancement with AZO as an Electron Transport Layer

Low-Temperature and Ambient Processed All Inorganic CsPbBr₃ Perovskite Solar Cells: Stability Enhancement with AZO as an Electron Transport Layer