Tunable Optoelectronic Properties of CsPbBr3 Perovskite Nanocrystals for Photodetectors Applications

Suhail, Atif; Saini, Ankush; Beniwal, Shivang; Bag, Monojit

doi:10.1021/acs.jpcc.3c04856

Cited by 12 publications

(1 citation statement)

References 50 publications

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“…In comparison with other perovskite NC PDs reported in the literature, the device described here has the best-in-class performance, as summarized in Table 2. 41–44…”

Section: Resultsmentioning

confidence: 99%

Broadband photodetectors from silane-passivated CsPbBr₃ nanocrystals by ultrasound-mediated synthesis

Ely,

Vieira,

Reyes-Banda

et al. 2024

Nanoscale

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“…In comparison with other perovskite NC PDs reported in the literature, the device described here has the best-in-class performance, as summarized in Table 2. 41–44…”

Section: Resultsmentioning

confidence: 99%

Broadband photodetectors from silane-passivated CsPbBr₃ nanocrystals by ultrasound-mediated synthesis

Ely,

Vieira,

Reyes-Banda

et al. 2024

Nanoscale

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Structural Stability of Mixed‐Halide Perovskite Nanocrystals in Energy Storage: The Role of Iodine Expulsion

Kumar,

Suhail,

Sagar Shukla

et al. 2024

ChemNanoMat

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In the pursuit of efficient optoelectronics devices, hybrid lead halide perovskite quantum dots (PQDs) have emerged as highly promising semiconductor materials due to their intriguing properties. While these materials have been used in many applications, the fundamental understanding of their behavior remains relatively unexplored, especially for the mixed halide perovskite samples. To facilitate the advancement of PQD technologies for commercial applications, it is essential to gain insights into the role of ion migration. This study delves into the fundamental aspects of ion migration in halide perovskite nanocrystals. Porous electrodes for supercapacitor application were fabricated using CsPbBr3‐xIx (x=0,1,2) nanocrystals prepared via the ligand‐assisted re‐precipitation (LARP) method. Three‐electrode electrochemical measurements and several other characterizations were conducted under dark conditions to evaluate device performance and elucidate the impact of mixed halides on device kinetics and stability. X‐ray photoelectron spectroscopy before and after the electrochemical measurement reveals intriguing findings. Notably, the analysis uncovered the phase segregation in the metal halide perovskite nanocrystals with particular emphasis on CsPbBr2I due to its distinctive mixed‐halide behavior. The specific capacitance increases with the increasing cycles. Interestingly, as the iodide content increases, there is no selective halide expulsion as the structure collapses rapidly.

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Advancing Scalability and Sustainability of Perovskite Light‐Emitting Diodes Through the Microwave Synthesis of Nanocrystals

Almeida da Silva,

Sánchez,

Alberola‐Borràs

et al. 2024

Energy & Environ Materials

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In recent years, perovskite light‐emitting diodes have witnessed a remarkable evolution in both efficiency and luminance levels. Nonetheless, the production of such devices typically relies on protracted synthesis procedures at elevated temperatures and vacuum/inert conditions (e.g. hot‐injection synthesis), thus rendering them technically unsuitable for extensive display and/or lighting applications manufacturing. Although alternative synthetic protocols have been proposed, e.g. ligand‐assisted reprecipitation, ultrasonic and microwave‐based methods, their suitability for the construction of high‐performing light‐emitting diodes has been reported in only a few studies. In this study, we demonstrate the fabrication of highly efficient lighting devices based on CsPbBr3 colloidal perovskite nanocrystals synthesized by a fast, energetically efficient, and up‐scalable microwave‐assisted method. These nanocrystals exhibit an impressive photoluminescence quantum yield of 66.8% after purification, with a very narrow PL spectrum centered at 514 nm with a full width at half‐maximum of 20 nm. Similarly, the PeLEDs achieve a maximum external quantum efficiency of 23.4%, a maximum current efficiency of 71.6 Cd A−1, and a maximum luminance level that exceeds 4.7 × 104 Cd m−2. Additionally, a significantly lower energy consumption for microwave‐mediated synthesis compared with hot injection is demonstrated. These findings suggest that this synthetic procedure emerges as an outstanding and promising method towards a scalable and sustainable fabrication of high‐quality perovskite light‐emitting diodes.

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Tunable Optoelectronic Properties of CsPbBr3 Perovskite Nanocrystals for Photodetectors Applications

Cited by 12 publications

References 50 publications

Broadband photodetectors from silane-passivated CsPbBr₃ nanocrystals by ultrasound-mediated synthesis

Broadband photodetectors from silane-passivated CsPbBr₃ nanocrystals by ultrasound-mediated synthesis

Structural Stability of Mixed‐Halide Perovskite Nanocrystals in Energy Storage: The Role of Iodine Expulsion

Advancing Scalability and Sustainability of Perovskite Light‐Emitting Diodes Through the Microwave Synthesis of Nanocrystals

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Tunable Optoelectronic Properties of CsPbBr3 Perovskite Nanocrystals for Photodetectors Applications

Cited by 12 publications

References 50 publications

Broadband photodetectors from silane-passivated CsPbBr3 nanocrystals by ultrasound-mediated synthesis

Broadband photodetectors from silane-passivated CsPbBr3 nanocrystals by ultrasound-mediated synthesis

Structural Stability of Mixed‐Halide Perovskite Nanocrystals in Energy Storage: The Role of Iodine Expulsion

Advancing Scalability and Sustainability of Perovskite Light‐Emitting Diodes Through the Microwave Synthesis of Nanocrystals

Contact Info

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Resources

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Broadband photodetectors from silane-passivated CsPbBr₃ nanocrystals by ultrasound-mediated synthesis

Broadband photodetectors from silane-passivated CsPbBr₃ nanocrystals by ultrasound-mediated synthesis