Color-converted white light-emitting diodes based on I-III-VI quantum dots: Package strategies and stability promotion

Wei, Jinxin; Hu, Zhe; Zhou, Wenjie; Lu, Hanxu; Zhang, Wanlu; Guo, Ruiqian

doi:10.1016/j.apmt.2022.101585

Cited by 12 publications

(9 citation statements)

References 97 publications

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“…A large Stokes shift is observed, indicating that the PL emission is not a band-edge emission between the valence band (VB) maximum and the conduction band (CB) minimum. The broadness of the UV-visible absorption and of the PL emission spectra originates from the trapping of electrons and holes in randomly located local states within the bandgap and not from the polydispersity in size and composition of the dots [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. The "self-trapped" model has been proposed for PL emission [31].…”

Section: I-iii-vi 2 Qd Optical Propertiesmentioning

confidence: 99%

“…Recent reviews summarize the synthesis and properties of AgInX 2 and CuInX 2 (X = S or Se) QDs and their applications, and these nanocrystals will not be the subject of this review [19][20][21][22][23][24]. The structural adaptability of I-III-VI 2 semiconductors has led to the development of a large panel of nanocrystals, among which we can mention Ag(Cu)GaX 2 , Ag(Cu)InGaX 2 or CuAlS 2 QDs, whose properties are often complementary to those of AgInX 2 and CuInX 2 QDs.…”

Section: Introductionmentioning

confidence: 99%

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Selected I-III-VI2 Semiconductors: Synthesis, Properties and Applications in Photovoltaic Cells

Shishodia,

Chouchene,

Gries

et al. 2023

Nanomaterials

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I–III–VI2 group quantum dots (QDs) have attracted high attention in photoelectronic conversion applications, especially for QD-sensitized solar cells (QDSSCs). This group of QDs has become the mainstream light-harvesting material in QDSSCs due to the ability to tune their electronic properties through size, shape, and composition and the ability to assemble the nanocrystals on the surface of TiO2. Moreover, these nanocrystals can be produced relatively easily via cost-effective solution-based synthetic methods and are composed of low-toxicity elements, which favors their integration into the market. This review describes the methods developed to prepare I-III-VI2 QDs (AgInS2 and CuInS2 were excluded) and control their optoelectronic properties to favor their integration into QDSSCs. Strategies developed to broaden the optoelectronic response and decrease the surface-defect states of QDs in order to promote the fast electron injection from QDs into TiO2 and achieve highly efficient QDSSCs will be described. Results show that heterostructures obtained after the sensitization of TiO2 with I-III-VI2 QDs could outperform those of other QDSSCs. The highest power-conversion efficiency (15.2%) was obtained for quinary Cu-In-Zn-Se-S QDs, along with a short-circuit density (JSC) of 26.30 mA·cm−2, an open-circuit voltage (VOC) of 802 mV and a fill factor (FF) of 71%.

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Section: I-iii-vi 2 Qd Optical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Selected I-III-VI2 Semiconductors: Synthesis, Properties and Applications in Photovoltaic Cells

Shishodia,

Chouchene,

Gries

et al. 2023

Nanomaterials

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“…In addition, compared to their binary analogues, TQDs have a higher degree of compositional flexibility and size control. For example, CuInS 2 , CuGaS 2 , and AgInS 2 nanomaterials have been recently applied to the construction of LEDs ( Mei et al, 2018 ; Wang et al, 2019 ; Su et al, 2020 ; Oluwafemi et al, 2021 ; May et al, 2022 ; Wei et al, 2022 ). This review describes the synthesis, physicochemical properties, and application of TQDs for LEDs production and includes a perspective of LEDs development using TQDs.…”

Section: Introductionmentioning

confidence: 99%

Integration of ternary I-III-VI quantum dots in light-emitting diodes

et al. 2023

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Ternary I-III-VI quantum dots (TQDs) are semiconductor nanomaterials that have been gradually incorporated in the fabrication of light-emitting diodes (LEDs) over the last 10 years due to their physicochemical and photoluminescence properties, such as adequate quantum yield values, tunable wavelength emission, and easy synthesis strategies, but mainly because of their low toxicity that allows them to be excellent candidates to compete with conventional Cd-Pb-based QDs. This review addresses the different strategies to obtain TQDs and how synthesis conditions influence their physicochemical properties, followed by the LEDs parameters achieved using TQDs. The second part of the review summarizes how TQDs are integrated into LEDs and white light-emitting diodes (WLEDs). Furthermore, an insight into the state-of-the-art LEDs development using TQDs, including its advantages and disadvantages and the challenges to overcome, is presented at the end of the review.

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“…I-III-VI ternary nanocrystals (I = Ag, Cu; II = Al, In, Ga; VI = S, Se) have a variety of striking optical and electronic properties due to their complex composition and crystal structure, making them promising for a wide range of applications such as solar cells, photocatalysis, light-emitting diodes, and lasers [24,25]. Silver-indium-sulfide (AIS)-based materials have different chemical properties from other I-III-VI materials due to the high reactivity of indium and silver ions with sulfur.…”

Section: Introductionmentioning

confidence: 99%

Tribo-Dependent Photoluminescent Behavior of Oleylamine-Modified AgInS2 and AgInS2-ZnS Nanoparticles as Lubricant Additives

et al. 2023

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The content of Cu2+ in lubricants is an essential indicator for determining the quality of the lubricant and predicting mechanical failure. Finding an effective and sensitive method for detecting Cu2+ in lubricants is of great importance in oil monitoring. In this work, AgInS2 (AIS) and AgInS2-ZnS (ZAIS) nanoparticles (NPs) were synthesized by a simple one-step approach via in-situ surface modification by oleylamine. The as-synthesized AIS and ZAIS NPs exhibit good dispersion stability in various apolar media. The photoluminescence (PL) of AIS and ZAIS NPs as lubricating additives could reflect and monitor the lubrication state of steel-copper pairs due to the quenching effect of Cu2+ from the friction process. With an optimum concentration of 0.5 wt% in paraffin oil, the friction coefficient of the AIS and ZAIS NPs at 100 N was decreased by 56.8 and 52.1% for steel-steel contacts, respectively. ZAIS was observed to be more effective than AIS in improving anti-wear (AW) and extreme pressure (EP) properties, with a load-bearing capacity of up to 1100 N. Characterization of the wear tracks by SEM and XPS indicates that a tribofilm composed of metal sulfides and oxides was formed during the lubricating process. This work not only reveals AIS and ZAIS NPs as a new class of promising candidates for lubricating additives but also unveils their potential for monitoring lubricant conditions and exploring lubricant service life.

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Color-converted white light-emitting diodes based on I-III-VI quantum dots: Package strategies and stability promotion

Cited by 12 publications

References 97 publications

Selected I-III-VI2 Semiconductors: Synthesis, Properties and Applications in Photovoltaic Cells

Selected I-III-VI2 Semiconductors: Synthesis, Properties and Applications in Photovoltaic Cells

Integration of ternary I-III-VI quantum dots in light-emitting diodes

Tribo-Dependent Photoluminescent Behavior of Oleylamine-Modified AgInS2 and AgInS2-ZnS Nanoparticles as Lubricant Additives

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