Non-ultrawide bandgap CsPbBr3 nanosheet for sensitive deep ultraviolet photodetection

Wu, Chunyan; Le, Yu-Xuan; Liang, Liyan; Li, Jing‐Yue; Liang, Feng‐Xia; Chen, Shirong; Yang, Xiaoping; Zhou, Yubing; Luo, Lin‐Bao

doi:10.1016/j.jmst.2023.03.032

Cited by 11 publications

(3 citation statements)

References 24 publications

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“…When the thickness of the CsPbBr 3 nanosheet is 68 nm, the blue shift of the peak response reaches 265 nm. 34 Fig. 2e shows that as the wavelength increases, the absorption rate of photons in the crystal decreases.…”

Section: Metal Halide Perovskite Solar Blind Photodetectormentioning

confidence: 95%

Recent progress on solar blind deep ultraviolet photodetectors based on metal halide perovskites

Yang,

Lei,

Jin

2024

J. Mater. Chem. C

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Section: Metal Halide Perovskite Solar Blind Photodetectormentioning

confidence: 95%

Recent progress on solar blind deep ultraviolet photodetectors based on metal halide perovskites

Yang,

Lei,

Jin

2024

J. Mater. Chem. C

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“…Compared to perovskite quantum dots, CsPbBr 3 NPLs shrink their thickness in only one direction, allowing for the formation of different layers and precise control of the emission wavelength from green to deep blue without the need for other elements. Two-dimensional (2D) CsPbBr 3 NPLs have become potential photodetector materials because of their excellent photophysical properties, such as their large absorption cross section, high exciton binding energy, excellent charge transfer performance, and appropriate flexibility. − Especially the strong quantum confinement effect in the 2D structure allows more significant structural and optical characteristics. In the past few years, various 2D materials have been used to make low-dimensional photoconductive detectors.…”

Section: Introductionmentioning

confidence: 99%

Ultrastable Photodetectors Based on Blue CsPbBr₃ Perovskite Nanoplatelets via a Surface Engineering Strategy

Wang,

Du,

Jiang

et al. 2024

ACS Appl. Mater. Interfaces

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Recently, photodetectors based on perovskite nanoplatelets (NPLs) have attracted considerable attention in the visible spectral region owing to their large absorption cross-section, high exciton binding energy, excellent charge transfer properties, and appropriate flexibility. However, their stability and performance are still challenging for perovskite NPL photodetectors. Here, a surface engineering strategy to enhance the optical stability of blue-light CsPbBr 3 NPLs by acetylenedicarboxylic acid (ATDA) treatment has been developed. ATDA has strong binding capacity and a short chain length, which can effectively passivate defects and significantly improve the photoluminescence quantum efficiency, stability, and carrier mobility of NPLs. As a result, ATDA-treated CsPbBr 3 NPLs exhibit improved optical properties in both solutions and films. The NPL solution maintains high PL performance even after being heated at 80 °C for 2 h, and the NPL film remains nondegradable after 4 h of exposure to ultraviolet irradiation. Especially, photodetectors based on the treated CsPbBr 3 NPL films demonstrate exceptional performance, especially when the detectivity approaches up to 9.36 × 10 12 Jones, which can be comparable to the best CsPbBr 3 NPL photodetectors ever reported. More importantly, the assembled devices demonstrated high stability (stored in an air environment for more than 30 days), significantly exceeding that of untreated NPLs.

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“…As a novel and burgeoning category of QDs, inorganic cesium lead halide CsPbX 3 (X = Cl, Br, I) QDs have drawn widespread interest, due to their exceptional and controllable optical/electric properties as well as great application potentials in different optoelectronic devices, such as solar cells, photodetectors, and light-emitting diodes. − Due to their excellent quality in adjustable dimension, UV radiation sensitivity, as well as high transparency in the visible light wavelength region, inorganic perovskite QDs are thought promising to be used as efficient spectral converters, − while their NRET effect has never been investigated when combined with a conjugate organic hole transporting layer, such as poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), which is a rather promising, simple, and production-line-compatible method to improve their energy conversion efficiency.…”

mentioning

confidence: 99%

Nonradiative Energy Transfer Enables a hv < E_g Response of Perovskite Quantum Dots in Si-Based Inorganic–Organic Hybrid Solar Cells

Cao,

Guan,

et al. 2024

J. Phys. Chem. Lett.

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High performance is a crucial factor in seeking a more competitive levelized cost of electricity for the extensive popularization of c-Si solar cells. Here, CsPbBr 3 quantum dots (QDs) have been first applied as the light-converting layer to enhance the full-spectrum light response, resulting in an ∼71% enhancement of power conversion efficiency within silicon-based solar cells. Remarkably, even if the photon energy is smaller than the bandgap of CsPbBr 3 QDs, the long-wavelength external quantum efficiency shows a significant increase. Such surprising results can be attributed to the nonradiative energy transfer (NRET) mechanism of CsPbBr 3 QDs, which can transfer longwavelength-generated dipoles into the Si base with the assistance of a Coulomb force. Furthermore, a dipole-transferring model, which considers that the Al 2 O 3 passivation layer would play a negative role in the NRET process, is creatively but supportively proposed. These results highlight a simple, low-cost but promising strategy to improve the performance of c-Si solar cells.N owadays, crystalline silicon (c-Si) based solar cells dominate ∼95% of the photovoltaic (PV) market. 1 So, even an insignificant performance improvement of these commercial c-Si solar cells, to seek a more competitive levelized cost of electricity (LCOE), is highly valuable. 2−4 Until now, a bunch of strategies have been demonstrated, such as constructing different stacked tandem even multijunction cell architecture (perovskite/c-Si tandem, 5−7 polymer/perovskite tandem, 8−10 or amorphous Si/c-Si tandem, 11−13 and so on), to overcome the Shockley-Queisser limit of ∼33% for single-junction c-Si solar cells. 14 For example, the perovskite thin film materials, attractive in recent years for their high spectral response, and low cost as well as a high initial performance of a single junction, 15−17 can be used as the top cell, to form perovskite/Si tandem solar cells. 18,19 However, there are lots of challenges in designing/fabricating tandem/ multijunction, such as photocurrent matching, tunnel junction, and so on. 20,21 Besides, the high-energy photons, particularly in the ultraviolet (UV) wavelength region, which have energy much higher than the bandgap, are mostly absorbed nearly at the surface of Si devices but provide few effective carriers for device performance because of more defect states at the interface. 22 Therefore, exploring an easier/simpler way to efficiently utilize these high-energy photons of short wavelength even the UV region for higher performance is needed, such as using light-converting layers in front of the c-Si solar cells may be a promising approach. 23−25

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Non-ultrawide bandgap CsPbBr3 nanosheet for sensitive deep ultraviolet photodetection

Cited by 11 publications

References 24 publications

Recent progress on solar blind deep ultraviolet photodetectors based on metal halide perovskites

Recent progress on solar blind deep ultraviolet photodetectors based on metal halide perovskites

Ultrastable Photodetectors Based on Blue CsPbBr₃ Perovskite Nanoplatelets via a Surface Engineering Strategy

Nonradiative Energy Transfer Enables a hv < E_g Response of Perovskite Quantum Dots in Si-Based Inorganic–Organic Hybrid Solar Cells

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Non-ultrawide bandgap CsPbBr3 nanosheet for sensitive deep ultraviolet photodetection

Cited by 11 publications

References 24 publications

Recent progress on solar blind deep ultraviolet photodetectors based on metal halide perovskites

Recent progress on solar blind deep ultraviolet photodetectors based on metal halide perovskites

Ultrastable Photodetectors Based on Blue CsPbBr3 Perovskite Nanoplatelets via a Surface Engineering Strategy

Nonradiative Energy Transfer Enables a hv < Eg Response of Perovskite Quantum Dots in Si-Based Inorganic–Organic Hybrid Solar Cells

Contact Info

Product

Resources

About

Ultrastable Photodetectors Based on Blue CsPbBr₃ Perovskite Nanoplatelets via a Surface Engineering Strategy

Nonradiative Energy Transfer Enables a hv < E_g Response of Perovskite Quantum Dots in Si-Based Inorganic–Organic Hybrid Solar Cells