Environmental assessment of new technologies: Production of a Quantum Dots-Light Emitting Diode

Scalbi, Simona; Fantin, Valentina; Antolini, F.

doi:10.1016/j.jclepro.2016.10.098

Cited by 21 publications

(7 citation statements)

References 65 publications

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“…Finally Scalbi et al (2017) studied the environmental impact, by means of the Lyfe Cycle Assessment methodology, of a QD-LED including the CdS QDs made by laser and embedded in a electroluminescent polymer like polyfluorene. Surprisingly the final results showed that the hotspots for the environmental impact are the polymer synthesis and ITO electrode manufacturing.…”

Section: Discussionmentioning

confidence: 99%

Quantum Dots Synthesis Through Direct Laser Patterning: A Review

Antolini

Orazi

2019

Front. Chem.

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In this brief review the advances on Direct Laser Patterning (DLP) for the synthesis of photo-luminescent semiconductor quantum dots (QDs) belonging to II-VI groups, especially in solid state using laser-assisted conversion are reported and commented. The chemistry of the precursor synthesis is illustrated because it is a crucial step for the development of the direct laser patterning of QDs. In particular, the analysis of cadmium (bis)thiolate and cadmium xanthates precursors after thermal and laser treatment is examined, with a special focus on the optical properties of the formed QDs. The second part of the review examines how the laser parameters such as the wavelength and pulse duration may regulate the properties of the patterned QDs. The DLP technique does not require complex laser systems or the use of dangerous chemical post treatments, so it can be introduced as a potential method for the patterning of pixels in quantum dot light emitting diodes (QD-LEDs) for display manufacturing.

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Section: Discussionmentioning

confidence: 99%

Quantum Dots Synthesis Through Direct Laser Patterning: A Review

Antolini

Orazi

2019

Front. Chem.

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“…After updating these assessments with new data on the amount of materials in televisions, In-QDs were found to require approximately 13 times more energy (MJ cm –2 ) than Cd-QDs . LCAs have also been used to point out areas of concern in the manufacturing of Cd-QDs into quantum light emitting diode displays (QLEDs), such as the aquatic acidification and ecotoxicity of a Cd-QD encapsulating polymer …”

Section: Introductionmentioning

confidence: 99%

Are Substitutes to Cd-Based Quantum Dots in Displays More Sustainable, Effective, and Cost Competitive? An Alternatives Assessment Approach

Béchu

Ghoshal

Moores

et al. 2022

ACS Sustainable Chem. Eng.

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Light emissive organics and inorganic nanoparticles are substance classes competing for applications in displays in the form of organic light emitting diodes (OLEDs) and quantum LEDs (QLEDs), respectively. Upcoming substance classes, perovskites and Q-OLED displays, also contain novel nanomaterials and organics for these applications. However, the safety and viability of these emissive substances is difficult to assess quickly and broadly because of their complexity, their inherently different structures, and their rapid evolution in the literature. We propose the use of an alternatives assessment focusing on hazard, cost, and performance, so as to compare these possible substitute substances, with incombent cadmium-containing quantum dots. This assessment type is used in industry and government to inform chemical substitution. It uses available information, while pointing out important data gaps for decision-making. The cost assessment highlights competitiveness of OLEDs because of the low amounts needed in their application for display, but performance assessments do not identify a preferred alternative. The hazard results indicate that there is no clear alternative either, with each novel nanomaterial or organic substance having different negative aspects. These results identify the need for a low-hazard highperforming alternative substance, and the assessment provides a framework for researchers to evaluate their own novel substances.

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“…Life cycle assessment (LCA) is a standard method regulated by the international standards ISO 14040-14044:2020 [12,13], recently amended, and permits to evaluate the environmental impact of processes and products. In literature, there are several applications of the LCA on nanoproducts and nanotechnologies to understand the environmental impacts and/or to highlight possible improvement in production and/or use [14].…”

Section: Introductionmentioning

confidence: 99%

Silicon nanoparticles as active materials for LED: laser synthesis and functionalization for tuning luminescence

D’Amato

Iacono

Santoni

et al. 2022

J. Phys.: Conf. Ser.

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Silicon nanocrystals (SiNPs) are an extensively studied light-emitting material due to their inherent biocompatibility and easy integration with silicon-based technology. Although low luminescence quantum yields of as-prepared SiNPs, the exploitation of the surface chemistry of SiNPs plays a key role in tuning their luminescence. In this work, the development of SiNPs as active materials for innovative LEDs was investigated. SiNPs were synthesized by using laser pyrolysis, a very flexible tool for lab-scale production in developmental quantities. The synthesized SiNPs have dimensions from 5 to 15 nm and high purity grade but show weak luminescence. For this reason, chemical treatments were performed on SiNPs: surface modifications lead to an improvement of their luminescence properties. Chemical and optical characterization were performed by conventional and advanced techniques, such as FTIR, BET, UV-VIS absorption and emission, XPS, TEM and confocal Raman. A Life Cycle Assessment (LCA) study of laser synthesis of SiNPs was conducted with the aim to identify the potential environmental impacts coming from this production method.

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Environmental assessment of new technologies: Production of a Quantum Dots-Light Emitting Diode

Cited by 21 publications

References 65 publications

Quantum Dots Synthesis Through Direct Laser Patterning: A Review

Quantum Dots Synthesis Through Direct Laser Patterning: A Review

Are Substitutes to Cd-Based Quantum Dots in Displays More Sustainable, Effective, and Cost Competitive? An Alternatives Assessment Approach

Silicon nanoparticles as active materials for LED: laser synthesis and functionalization for tuning luminescence

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