Application of Perovskite Quantum Dots as an Absorber in Perovskite Solar Cells

Chi, Weiguang; Banerjee, Sanjay K.

doi:10.1002/anie.202112412

Cited by 47 publications

(27 citation statements)

References 91 publications

(152 reference statements)

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“…Tremendous advances have been made in the synthesis and optoelectronic applications of perovskite quantum dots (PeQDs). [ 1–7 ] By virtue of tunable emission peaks across visible spectrum photoluminescence quantum yield (PLQY), narrow half‐width, wide color gamut (≈140%), and the high photoluminescence quantum yield, organic PeQD light‐emitting diodes (PeQLEDs) have attracted significant attention. [ 8–12 ] Recently, great breakthroughs have been achieved in the synthesis and performance of green‐ and red‐emitting PeQLEDs in recent years, [ 13–22 ] whereas the low performance of blue‐emitting PeQLEDs (wavelength range: 460–490 nm) impedes the development of commercial display applications for PeQLEDs.…”

Section: Introductionmentioning

confidence: 99%

Enriched‐Bromine Surface State for Stable Sky‐Blue Spectrum Perovskite QLEDs With an EQE of 14.6%

Zhu

Tong

et al. 2022

Advanced Materials

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Halogen vacancies are of great concern in blue‐emitting perovskite quantum‐dot light‐emitting diodes because they affect their efficiency and spectral shift. Here, an enriched‐bromine surface state is realized using a facile strategy that employs a PbBr2 stock solution for anion exchange based on Cd‐doped perovskite quantum dots. It is found that the doped Cd ions are expected to reduce the formation energy of halogen vacancies filled by the external bromine ions, and the excess free bromine ions in solution are enriched in the surface by anchoring with halogen vacancies as sites, accompanied with the shedding of surface long‐chain ligands during the anion exchange process, resulting in a Br‐rich and “neat” surface. Moreover, the surface state exhibits good passivation of the surface defects of the controlled perovskite QDs and simultaneously increases the exciton binding energy, leading to excellent optical properties and stability. Finally, the sky‐blue emitting perovskite quantum‐dot light‐emitting diodes (QLEDs) (490 nm) are conducted with a record external quantum efficiency of 14.6% and current efficiency of 19.9 cd A−1. Meanwhile, the electroluminescence spectra exhibit great stability with negligible shifts under a constant operating voltage from 3 to 7 V. This strategy paves the way for improving the efficiency and stability of perovskite QLEDs.

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Section: Introductionmentioning

confidence: 99%

Enriched‐Bromine Surface State for Stable Sky‐Blue Spectrum Perovskite QLEDs With an EQE of 14.6%

Zhu

Tong

et al. 2022

Advanced Materials

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“…[117,118] Furthermore, proper control of the crystal size helps to increase the hetero-interfacial contact area and shift their absorption edge. [119,120] These physical properties make structure-level low-dimensional halide perovskites promising as light harvesters in photonic memristors, [121] which synergistically leverages light illumination as the second external stimuli in addition to the electric one for multistate data storage. [76] A variation of memory performance based on structure-level low-dimensional perovskite could be realized by systematically changing the bandgap.…”

Section: Structure-level Low-dimensional Perovskitesmentioning

confidence: 99%

Low‐Dimensional Metal‐Halide Perovskites as High‐Performance Materials for Memory Applications

Guan

Lei

et al. 2022

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Metal‐halide perovskites have drawn profuse attention during the past decade, owing to their excellent electrical and optical properties, facile synthesis, efficient energy conversion, and so on. Meanwhile, the development of information storage technologies and digital communications has fueled the demand for novel semiconductor materials. Low‐dimensional perovskites have offered a new force to propel the developments of the memory field due to the excellent physical and electrical properties associated with the reduced dimensionality. In this review, the mechanisms, properties, as well as stability and performance of low‐dimensional perovskite memories, involving both molecular‐level perovskites and structure‐level nanostructures, are comprehensively reviewed. The property–performance correlation is discussed in‐depth, aiming to present effective strategies for designing memory devices based on this new class of high‐performance materials. Finally, the existing challenges and future opportunities are presented.

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“…PQDs Compositional Engineering. Although the phase stability of perovskites has been improved in the form of QDs compared to their bulk counterparts, 139 under operation, the stability of PQDSCs has been considered one of the bottlenecks for the PV devices. To circumvent this issue, we witnessed a lot of efforts by using fundamental strategies including compositional engineering, QD surface treatment, and optimization of the SC layered structure.…”

Section: Applications Of Perovskite Quantum Dotsmentioning

confidence: 99%

Lead Halide Perovskite Quantum Dots for Photovoltaics and Photocatalysis: A Review

Peighambardoust

Sadeghi

Aydemir

2022

ACS Appl. Nano Mater.

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Lead halide-based perovskite quantum dots (PQDs) have recently emerged as an important class of nanocrystal (NC) materials for optoelectronic and photoelectrochemical applications. Thanks to their intriguing features including tunable band gap, narrow emission, high charge carrier mobility, remarkable light-absorbing factors, and long charge diffusion length, there has been a surge in research on lead halide-based PQDs and their applications. In this review, we showcase the fundamentals of PQDs and two principal applications including PQD solar cells (PQDSCs) and photocatalytic conversion. First, a thorough discussion on PQDSCs, their structure, surface treatment, and interface engineering along with their recent progress are presented. It is highlighted that the improvement of the efficiency of PQDSCs from below 10% to beyond 16% in a matter of a few years has turned them into promising candidates for future SC applications. Subsequently, the application of PQDs in photocatalytic reactions such as hydrogen production, CO2 reduction, and organic compounds’ degradation is summarized. Not to mention that, despite the remarkable properties of PQDs in SCs and photocatalysis, the inferior stability of PV devices based thereon under operation as well as their poor tolerance under air, water, light, and heat impede their widespread application. For this, the practical efforts and possible solutions are extensively addressed. Finally, an outlook is provided, addressing further merits, and demerits of each application as well as prospective opportunities.

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Application of Perovskite Quantum Dots as an Absorber in Perovskite Solar Cells

Cited by 47 publications

References 91 publications

Enriched‐Bromine Surface State for Stable Sky‐Blue Spectrum Perovskite QLEDs With an EQE of 14.6%

Enriched‐Bromine Surface State for Stable Sky‐Blue Spectrum Perovskite QLEDs With an EQE of 14.6%

Low‐Dimensional Metal‐Halide Perovskites as High‐Performance Materials for Memory Applications

Lead Halide Perovskite Quantum Dots for Photovoltaics and Photocatalysis: A Review

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