Synthesis and Characterization of Large PbSe Colloidal Quantum Dots

被引：0

作者：

Palosz, Witold ^{[1
]}

Trivedi, Sudhir ^{[1
]}

DeCuir, Eric, Jr. ^{[2
]}

Wijewarnasuriya, Priyalal S. ^{[2
]}

Thon, Susanna M. ^{[3
]}

Cheng, Yan ^{[3
]}

Lu, Chengchangfeng ^{[3
]}

Jensen, Janet L. ^{[4
]}

机构：

[1] Brimrose Corp America, 19 Loveton Circle, Sparks, MD 21152 USA

[2] US Army, Res Lab, SEDD EO&P, 2800 Powder Mill Rd, Adelphi, MD 20783 USA

[3] Johns Hopkins Univ, Dept Elect & Comp Engn, Baltimore, MD 21218 USA

[4] Edgewood Chem Biol Ctr, Ricketts Point Rd, Gunpowder, MD 21010 USA

来源：

PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION | 2021年 / 38卷 / 06期

关键词：

colloidal quantum dots; PbSe; synthesis; characterization; EXTINCTION COEFFICIENT; SOLAR-CELLS; NANOCRYSTALS; PERFORMANCE; INKS;

D O I：

10.1002/ppsc.202000285

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Large colloidal quantum dots of PbSe (first excitonic peak position >2 mu m) are synthesized under different conditions of temperature, the concentration of precursors and their ratio, and concentration of oleic acid and diphenylphosphine. The dependence of the optical properties, grain size dispersity, and process yield on the processing conditions is systematically explored and discussed. The Ostwald ripening process and how it affects grain growth is demonstrated. Finally, the results for the dependence of the absorption wavelength on the grain diameter for large nanocrystals are compared to the relationships reported in the literature for smaller nanocrystals.

引用

页数：8

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