Tuning optical properties of CsPbBr3 perovskite nanocrystals through silver doping

Krishna, B. Gopal; Ghosh, Dhriti Sundar; Tiwari, Sanjay

doi:10.1007/s10854-021-07447-4

Cited by 11 publications

(4 citation statements)

References 48 publications

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“…Two sharp intensive peaks located at 59 and 71 cm −1 are assigned to the vibrational mode of the [PbBr 6 ] 4− octahedron. [ 22 ] In detail, the enhanced Raman intensity of rhombic dodecahedron CsPbBr 3 NCs may be due to the localized surface plasmon resonance leading to the increased coupling efficiency of the crystal vibrational modes, which is advantageous for optoelectronic devices. [ 23 ] The other two broad weak peaks at 125 and 151 cm −1 are caused by Pb‐Br stretching, further demonstrating that the vibrational modes of CsPbBr 3 NCs are mainly from the [PbBr 6 ] 4− octahedron.…”

Section: Resultsmentioning

confidence: 99%

Large Orthorhombic Polyhedral CsPbBr₃ Nanocrystals for Ultrasensitive Photodetectors with Type‐I Structures

Wang

Yang

Ding

et al. 2023

Adv Materials Technologies

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Lead halide perovskite nanocrystals (LHPs) are emerging with enormous potential for high‐performance optoelectronics. Regrettably, most of the reported lead halide nanocrystal‐based photodetectors (LHP‐PDs) focus on six‐faceted hexahedron (cube/platelet) shapes and encounter issues of interface recombination of the photogenerated electron‐hole pairs and low carrier migration efficiency. Herein, a vertical heterojunction photodetector with type‐I band alignment based on high‐quality polyhedral orthorhombic CsPbBr3 nanocrystals (NCs) is designed and realized. The results show that utilizing these rhombic dodecahedron CsPbBr3 as photosensitive layers, the p‐Si/CsPbBr3 device presents high responsivity (R) and detectability (D*) values of 8.36 A W−1 and 9.33 × 1013 Jones, a powerful weak light detection capability with an ultralow noise equivalent power (NEP) of 2.14 × 10−15 W Hz−1/2, and a fast response time of 90/162 µs . Meanwhile, based on theoretical density functional theory (DFT) and energy band analysis, it is shown that the recombination of photogenerated electron‐hole pairs can be significantly suppressed, and the spectral response of the PDs is almost contributed by photogenerated carriers in CsPbBr3 . The work provides a new avenue for improving the performance of PDs based on large‐size orthorhombic polyhedral CsPbBr3 NCs by morphological structure modulation and optimized band alignment engineering.

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Section: Resultsmentioning

confidence: 99%

Large Orthorhombic Polyhedral CsPbBr₃ Nanocrystals for Ultrasensitive Photodetectors with Type‐I Structures

Wang

Yang

Ding

et al. 2023

Adv Materials Technologies

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“…All-inorganic CsPbX 3 QDs are important materials, as they are solution processable and of high interest due to their charming properties such as narrow emission bandwidth, high optical absorption, stimulated emission, etc. Due to tunable bandgap, these materials have emission wavelengths in the visible spectrum (400 nm−700 nm), which allows their promising potential in phototransistors, solar cells, light emitting diodes (LEDs), sensors, and photodetectors [15][16][17][18][19][20][21][22][23][24][25][26]. Huang and co-workers recently reported the application of CsPbBr 3 QDs in ammonia sensing by dynamic passivation of CsPbBr 3 with ammonia, which passivates surface defects introduced during the purification of QDs and enhances the PL of purified QDs.…”

Section: Introductionmentioning

confidence: 99%

Study of charge transport in cesium lead bromide perovskite quantum dots and PCPDTBT composites: an application to photosensitive FETs

Shukla,

Kumar,

Singh

et al. 2024

Phys. Scr.

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This work aims to investigate the optical, structural, and photo-physical properties of PCPDTBT/cesium lead bromide (CsPbBr3) perovskite quantum dots (QDs) composite for optoelectronic devices. The composite was prepared by processing the PCPDTBT and CsPbBr3 QDs via the solution blending method. Incorporating CsPbBr3 QDs with different weight % (wt%) ratio in PCPDTBT influences its optoelectronic properties. UV-vis absorption spectroscopy, photoluminescence (PL), and atomic force microscopy measurements were used to analyze their optical and morphological properties. We observed that incorporating 4 wt% QDs in PCPDTBT enhanced its light absorption and charge transfer properties. Further, we fabricated the field effect transistors (FETs) of pristine PCPDTBT and PCPDTBT/CsPbBr3 QDs composite (4 wt%) to study their electronic and charge transfer features. Significant variation in source-to-drain current (IDS) and carrier mobility has been observed. A substantial increased output current was observed for composite FET than pristine PCPDTBT based FET due to charge transfer from QDs to PCPDTBT. Both PCPDTBT and PCPDTBT/CsPbBr3 QDs based FET shows enhanced current with illumination, which could be attributed to the photo-generated charge carriers.

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“…Chen et al plasmonic-enhanced blue photoluminescence efficiency of CsPb(Br/Cl)3 perovskite nanocrystals by Ag nanoparticles [23] . Krishna et al tuned the photoluminescence intensity of CsPbBr3 perovskite nanocrystals by silver doping [24] . Zhang et al enhanced the luminescence of all-inorganic perovskite surface plasmon light-emitting diodes by doping Au and Ag alloy nanoparticles [25] .…”

Section: ．Introductionmentioning

confidence: 99%

Improving optical properties of blue emission perovskite by plasmonic enhancement

Yuanxun

XUliang

Huang

et al. 2023

Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022)

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Halide perovskites (ABX3) have advantages of high photoluminescence quantum yield (PLQY), high gain coefficient, high carrier mobility and tunable bandgaps, which has great development potential and application prospects in tunable photoelectronic devices. However, blue emission perovskite LEDs lag behind their red and green counterparts in efficiency due to its high defect density and difficulties of maintaining quantum efficiency, which greatly restricts the development of the white light LEDs and display devices. Localized surface plasmon resonance (LSPR) can cause the resonant interactions of electromagnetic waves and free electrons in solid-state materials that have demonstrated great advantages in the field of Raman mapping, photodetector and laser. In addition, photoelectric properties of materials can also be manipulated by it that has great advantages for tunable photoelectric devices. In this work, the finite difference time domain (FDTD) method was used to simulate the extinction spectra of Au or Ag nanoparticles on SiO2, as well as study the influences of the shape of the nanoparticles on the position of extinction spectral peak. Then the influence of luminescence efficiency of the blue emission perovskite was analyzed by this model. Finally, the optimal optical enhancement structure of BE perovskite was obtained. According to the simulation results, compared with Au and Ag solid spheres, the Ag hollow sphere not only has the best optical enhancement effect on blue emission perovskite, but also has wide tunable ranges that can cover the entire optical band. Therefore, based on the regulation sensitivity of the Ag hollow spheres in the optical band, it provides an effective solution and simulation results for the performance optimization of perovskite-based tunable photoelectronic devices.

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Tuning optical properties of CsPbBr3 perovskite nanocrystals through silver doping

Cited by 11 publications

References 48 publications

Large Orthorhombic Polyhedral CsPbBr₃ Nanocrystals for Ultrasensitive Photodetectors with Type‐I Structures

Large Orthorhombic Polyhedral CsPbBr₃ Nanocrystals for Ultrasensitive Photodetectors with Type‐I Structures

Study of charge transport in cesium lead bromide perovskite quantum dots and PCPDTBT composites: an application to photosensitive FETs

Improving optical properties of blue emission perovskite by plasmonic enhancement

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Tuning optical properties of CsPbBr3 perovskite nanocrystals through silver doping

Cited by 11 publications

References 48 publications

Large Orthorhombic Polyhedral CsPbBr3 Nanocrystals for Ultrasensitive Photodetectors with Type‐I Structures

Large Orthorhombic Polyhedral CsPbBr3 Nanocrystals for Ultrasensitive Photodetectors with Type‐I Structures

Study of charge transport in cesium lead bromide perovskite quantum dots and PCPDTBT composites: an application to photosensitive FETs

Improving optical properties of blue emission perovskite by plasmonic enhancement

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Product

Resources

About

Large Orthorhombic Polyhedral CsPbBr₃ Nanocrystals for Ultrasensitive Photodetectors with Type‐I Structures

Large Orthorhombic Polyhedral CsPbBr₃ Nanocrystals for Ultrasensitive Photodetectors with Type‐I Structures