Thermodynamic Investigation of Increased Luminescence in Indium Phosphide Quantum Dots by Treatment with Metal Halide Salts.

التفاصيل البيبلوغرافية
العنوان:	Thermodynamic Investigation of Increased Luminescence in Indium Phosphide Quantum Dots by Treatment with Metal Halide Salts.
المؤلفون:	Calvin JJ; Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States., Swabeck JK; Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States., Sedlak AB, Kim Y; Inorganic Material Lab, Samsung Advanced Institute of Technology, Samsung Electronics, 130 Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16678, Republic of Korea., Jang E; Inorganic Material Lab, Samsung Advanced Institute of Technology, Samsung Electronics, 130 Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16678, Republic of Korea., Alivisatos AP; Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.; Kavli Energy NanoScience Institute, Berkeley, California 94720, United States.
المصدر:	Journal of the American Chemical Society [J Am Chem Soc] 2020 Nov 04; Vol. 142 (44), pp. 18897-18906. Date of Electronic Publication: 2020 Oct 23.
نوع المنشور:	Journal Article
اللغة:	English
بيانات الدورية:	Publisher: American Chemical Society Country of Publication: United States NLM ID: 7503056 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5126 (Electronic) Linking ISSN: 00027863 NLM ISO Abbreviation: J Am Chem Soc Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة:	Publication: Washington, DC : American Chemical Society Original Publication: Easton, Pa. [etc.]
مستخلص:	Increasing the quantum yields of InP quantum dots is important for their applications, particularly for use in consumer displays. While several methods exist to improve quantum yield, the addition of inorganic metal halide salts has proven promising. To further investigate this phenomenon, InP quantum dots dispersed in tetrahydrofuran were titrated with ZnCl 2 , ZnBr 2 , and InCl 3 . The optical properties were observed, and the reactions were studied by using quantitative ¹ H NMR and thermodynamic measurements from isothermal titration calorimetry. These measurements contradict the previously hypothesized reaction mechanism in which metal halide salts, acting as Z-type ligands, passivate undercoordinated anions on the surface of the quantum dots. This work provides evidence for a newly proposed mechanism wherein the metal halide salts undergo a ligand exchange with indium myristate. Thermodynamic measurements prove key to supporting this new mechanism, particularly in describing the organic ligand interactions on the surface. An Ising model was used to simulate the quantum dot surface and was fit by using thermodynamic and ¹ H NMR data. Together, these data and the proposed exchange mechanism provide greater insight into the surface chemistry of quantum dots.
تواريخ الأحداث:	Date Created: 20201023 Latest Revision: 20201104
رمز التحديث:	20240628
DOI:	10.1021/jacs.0c08954
PMID:	33095575
قاعدة البيانات:	MEDLINE

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تدمد:	1520-5126
DOI:	10.1021/jacs.0c08954