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Grant support

The authors are grateful for the financial support from the Swiss National Science Foundation (project number: 200021-178944). We thank Dr. K. Kunze for helpful discussions and technical assistance with the EDXS measurements. The authors thank Dr. S. Matveev and G. Raggl from JEOL in Freising, Germany for SEM support. We thank G. Stemmler for assistance with the PL measurements. The authors are grateful to ScopeM (ETH Zurich) for access to the electron microscopy facilities.

Analysis of institutional authors

Solari, Simon FAuthor

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Article

Stabilization of Lead-Reduced Metal Halide Perovskite Nanocrystalsby High-Entropy Alloying

Publicated to:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. 144 (13): 5864-5870 - 2022-04-06 144(13), DOI: 10.1021/jacs.1c12294

Authors: Solari, Simon F; Poon, Lok-Nga; Woerle, Michael; Krumeich, Frank; Li, Yen-Ting; Chiu, Yu-Cheng; Shih, Chih-Jen

Affiliations

Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan - Author
Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 10607, Taiwan - Author
Natl Taiwan Univ, Adv Res Ctr Green Mat Sci & Technol, Taipei 10617, Taiwan - Author
Swiss Fed Inst Technol, Inst Chem & Bioengn, CH-8093 Zurich, Switzerland - Author
Swiss Fed Inst Technol, Lab Inorgan Chem, CH-8093 Zurich, Switzerland - Author
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Abstract

Colloidal metal halide perovskite (MHP) nanocrystals (NCs) arean emerging class offluorescent quantum dots (QDs) for next-generationoptoelectronics. A great hurdle hindering practical applications, however, is theirhigh lead content, where most attempts addressing the challenge in the literaturecompromised the material's optical performance or colloidal stability. Here, wepresent a postsynthetic approach that stabilizes the lead-reduced MHP NCsthrough high-entropy alloying. Upon doping the NCs with multiple elements inconsiderably high concentrations, the resulting high-entropy perovskite (HEP)NCs remain to possess excellent colloidal stability and narrowband emission, witheven higher photoluminescence (PL) quantum yields,eta PL, and shorterfluorescence lifetimes,Tau PL. The formation of multiple phases containing mixedinterstitial and doping phases is suggested by X-ray crystallography. Importantly, the crystalline phases with higher degrees of latticeexpansion and lattice contraction can be stabilized upon high-entropy alloying. We show that the lead content can be approximatelyreduced by up to 55% upon high-entropy alloying. Thefindings reported here make one big step closer to the commercialization ofperovskite NCs

Keywords

BrCCspbx3EarthEfficiencyPhotoluminescenceQuantum dotsStability

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal JOURNAL OF THE AMERICAN CHEMICAL SOCIETY due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2022, it was in position 17/178, thus managing to position itself as a Q1 (Primer Cuartil), in the category Chemistry, Multidisciplinary. Notably, the journal is positioned above the 90th percentile.

From a relative perspective, and based on the normalized impact indicator calculated from World Citations provided by WoS (ESI, Clarivate), it yields a value for the citation normalization relative to the expected citation rate of: 6.03. This indicates that, compared to works in the same discipline and in the same year of publication, it ranks as a work cited above average. (source consulted: ESI Nov 14, 2024)

This information is reinforced by other indicators of the same type, which, although dynamic over time and dependent on the set of average global citations at the time of their calculation, consistently position the work at some point among the top 50% most cited in its field:

  • Weighted Average of Normalized Impact by the Scopus agency: 6.67 (source consulted: FECYT Feb 2024)
  • Field Citation Ratio (FCR) from Dimensions: 7.85 (source consulted: Dimensions Jun 2025)

Specifically, and according to different indexing agencies, this work has accumulated citations as of 2025-06-13, the following number of citations:

  • WoS: 37
  • Scopus: 40
  • Europe PMC: 5
  • OpenCitations: 32

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-06-13:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 56.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 56 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 1.75.
  • The number of mentions on the social network X (formerly Twitter): 3 (Altmetric).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.

Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: Switzerland; Taiwan.

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (SOLARI, SIMON FABIO) .