Emergence of Impurity-Doped Nanocrystal Light-Emitting Diodes

Luo, Dongxiang; Wang, Lin; Qiu, Ying; Huang, Runda; Liu, Baiquan

doi:10.3390/nano10061226

Cited by 13 publications

(14 citation statements)

References 377 publications

(423 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the insertion of atoms or ions of elements (e.g., transition metal, alkali metal) into host lattices, impurity-doped nanocrystals can possess desirable functionalities. Hence, impurity-doped nanocrystals are less sensitive than undoped ones to the chemical, thermal, and photochemical disturbances, considering that the self-quenching and reabsorption from enlarged Stokes shift can be eliminated [144][145][146]. Liu et al took the first step to use the impurity doping strategy for perovskites by incorporating Mn ions into CsPbX 3 , demonstrating that the energy transfer between perovskites and Mn 2+ had a crucial influence on the band-edge and Mn emissions [147].…”

Section: Impurity Dopingmentioning

confidence: 99%

Advances in Perovskite Light-Emitting Diodes Possessing Improved Lifetime

Xiao

Cheng

et al. 2021

Nanomaterials

Self Cite

View full text Add to dashboard Cite

Recently, perovskite light-emitting diodes (PeLEDs) are seeing an increasing academic and industrial interest with a potential for a broad range of technologies including display, lighting, and signaling. The maximum external quantum efficiency of PeLEDs can overtake 20% nowadays, however, the lifetime of PeLEDs is still far from the demand of practical applications. In this review, state-of-the-art concepts to improve the lifetime of PeLEDs are comprehensively summarized from the perspective of the design of perovskite emitting materials, the innovation of device engineering, the manipulation of optical effects, and the introduction of advanced encapsulations. First, the fundamental concepts determining the lifetime of PeLEDs are presented. Then, the strategies to improve the lifetime of both organic-inorganic hybrid and all-inorganic PeLEDs are highlighted. Particularly, the approaches to manage optical effects and encapsulations for the improved lifetime, which are negligibly studied in PeLEDs, are discussed based on the related concepts of organic LEDs and Cd-based quantum-dot LEDs, which is beneficial to insightfully understand the lifetime of PeLEDs. At last, the challenges and opportunities to further enhance the lifetime of PeLEDs are introduced.

show abstract

Section: Impurity Dopingmentioning

confidence: 99%

Advances in Perovskite Light-Emitting Diodes Possessing Improved Lifetime

Xiao

Cheng

et al. 2021

Nanomaterials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Where M represents the mass of the thin films deposited on the surface of the FTO glass substrate, which was calculated via equation (10). ( 10)…”

Section: Wavelength λ (Nm)mentioning

confidence: 99%

“…Incorporation of different elements (dopant ions) in the composition of the host semiconductor crystals such as PbS has also demonstrated alteration of various properties such as the control of the bandgap energy and change in the positions of the Fermi level of the semiconductor thin films [7][8][9][10]. The elements such as iron (Fe), manganese (Mn), nickel (Ni), cobalt (Co) have been known to possess self-induced spin electronic properties and as such can trigger highperformance potentials in the semiconductor materials they are incorporated for many device applications.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Optical, Structural and Compositional Properties of Electrodeposited Lead Manganese Sulfide (PbMnS) Thin Films for Possible Device Applications

et al. 2021

View full text Add to dashboard Cite

The properties of PbMnS semiconductor thin films deposited on fluorine-doped tin oxide (FTO) substrate using an electrodeposition method are investigated to determine their possible device applications. Lead acetate, manganese sulfate, and thiourea were used as precursors for sources of lead, manganese, and sulfur ions respectively. The concentration of lead, manganese, and sulfur ions sources with deposition voltage of 1.8 V was kept constant. The films were deposited using three electrodes system of electrodeposition method by varying deposition time. The films were characterized for optical, structural, morphological, and compositional properties and results showed that the absorbance, refractive index, and optical conductivity of the films are high in the visible (VIS) and near-infrared (NIR) regions but decreases in the NIR. These three properties initially increased with an increase in deposition time up to a time of 70 s which has the highest values of these properties before decreasing to lower values. The transmittance and extinction coefficient of the films are low in both VIS and NIR regions. The bandgap energy of PbS was found to be blue shifted with values of 1.51 eV, 1.54 eV, 1.60 eV, 1.45 eV, and 1.35 eV for the films deposited at 30 s, 50 s, 70 s, 90 s, and 110 s respectively. XRD analysis showed that the films are crystalline with sharp peaks positions indexable to crystalline planes of (111), (200), (211), (220), (311) and (400) with average crystallite size in the range of 16.110 nm to 17.218 nm. Energy-dispersive X-ray spectroscopy (EDX) results showed that the films are composed of lead, manganese, and sulfur but there are some impurity elements present mostly as a result of the substrate used. These properties exhibited by the deposited thin films of PbMnS showed that they can be used for many optoelectronic applications such as photovoltaic cells, sensors, photoconductors, etc.

show abstract

“…Optical and structural properties of 2D Ruddlesden–Popper (RP) halide perovskite crystals with a general formula of L 2 [ABX 3 ] n −1 BX 4 (L = ligand, A = monovalent cation, B = divalent cation, X = halide anion, and n = number of the octahedral layer) were well studied in the past due to their enhanced oscillator strength, large exciton binding energies, and optical nonlinearities. − Recently, colloidal synthesis of 2D lead halide perovskite (LHP) nanocrystals have been demonstrated by a number of different research groups. − Colloidally synthesized 2D LHP NCs show significantly improved optical properties than their bulk crystals, and thus they have been attracting increasing attention in recent years. Most importantly, owing to their unique optical properties, they hold great promise for future optoelectronic, electronic, and photonic applications. ,− It should be noted that 2D RP perovskite solar cells have long-term operational stability against light soaking and humidity in contrast to 3D perovskite devices . Also, the color purity and luminance of 2D RP perovskite LEDs are promising. , …”

Section: Introductionmentioning

confidence: 99%

L₂[GA_xFA_1–xPbI₃]PbI₄ (0 ≤ x ≤ 1) Ruddlesden–Popper Perovskite Nanocrystals for Solar Cells and Light-Emitting Diodes

Guvenc

Tunç

Balci

2021

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

The main challenges to overcome for colloidal 2D Ruddlesden−Popper (RP) organo-lead iodide perovskite nanocrystals (NCs) are phase instability and low photoluminescence quantum yield (PLQY). Herein, we demonstrate colloidal synthesis of guanidinium (GA)-L 2 [GAPbI 3 ]PbI 4 , formamidinium (FA)-L 2 [FAPbI 3 ]PbI 4 , and GA and FA alloyed L 2 [GA 0.5 FA 0.5 PbI 3 ]PbI 4 NCs without using polar or high boiling point nonpolar solvents. Importantly, we show that optical properties and phase stability of L 2 [APbI 3 ]PbI 4 NCs can be affectively tuned by alloying with guanidinium and formamidinium cations. Additionally, the band gap of NCs can be rapidly engineered by bromide ion exchange in L 2 [GA x FA 1−x PbI 3 ]PbI 4 (0 ≤ x ≤ 1) NCs. Our approach produces a stable dispersion of L 2 [FAPbI 3 ]PbI 4 NCs with 12.6% PLQY that is at least three times higher than the previously reported PLQY in the nanocrystals. Furthermore, L 2 [GAPbI 3 ]PbI 4 and L 2 [GA 0.5 FA 0.5 PbI 3 ]-PbI 4 NC films exhibit improved ambient stability over 10 days, which is significantly higher than L 2 [FAPbI 3 ]PbI 4 NC films, which transform to an undesired 1D phase within 6 days. The colloidally synthesized guanidinium-and formamidinium-based 2D RP organo-lead iodide perovskite NCs with improved stability and high PLQY demonstrated in this study may find applications in solar cells and light-emitting diodes. Therefore, large A-site cation-alloyed 2D RP perovskite NCs may provide a new way to rationalize high-performance and stable perovskite solar cells and light-emitting diodes.

show abstract

Emergence of Impurity-Doped Nanocrystal Light-Emitting Diodes

Cited by 13 publications

References 377 publications

Advances in Perovskite Light-Emitting Diodes Possessing Improved Lifetime

Advances in Perovskite Light-Emitting Diodes Possessing Improved Lifetime

Investigation of the Optical, Structural and Compositional Properties of Electrodeposited Lead Manganese Sulfide (PbMnS) Thin Films for Possible Device Applications

L₂[GA_xFA_1–xPbI₃]PbI₄ (0 ≤ x ≤ 1) Ruddlesden–Popper Perovskite Nanocrystals for Solar Cells and Light-Emitting Diodes

Contact Info

Product

Resources

About

Emergence of Impurity-Doped Nanocrystal Light-Emitting Diodes

Cited by 13 publications

References 377 publications

Advances in Perovskite Light-Emitting Diodes Possessing Improved Lifetime

Advances in Perovskite Light-Emitting Diodes Possessing Improved Lifetime

Investigation of the Optical, Structural and Compositional Properties of Electrodeposited Lead Manganese Sulfide (PbMnS) Thin Films for Possible Device Applications

L2[GAxFA1–xPbI3]PbI4 (0 ≤ x ≤ 1) Ruddlesden–Popper Perovskite Nanocrystals for Solar Cells and Light-Emitting Diodes

Contact Info

Product

Resources

About

L₂[GA_xFA_1–xPbI₃]PbI₄ (0 ≤ x ≤ 1) Ruddlesden–Popper Perovskite Nanocrystals for Solar Cells and Light-Emitting Diodes