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- W3021010167 abstract "Lead selenide quantum dots (QDs) were precipitated in lithium-aluminum-silicate glass-ceramics. Their optical properties and the crystallization behavior of both glass host and PbSe QDs were investigated. When the glasses heat-treated at 480–520 °C for 10 h, the absorption bands from PbSe QDs were tuned from 1051 to 2016 nm, and the PL bands from 1165 to 2095 nm. Upon the dwelling time 10 h, the crystallization of glass host required relatively higher heating temperature (∼490 °C) than the formation of PbSe QDs (∼480 °C). With the heat treatment at 490 °C for10 h, the PLQY from PbSe QDs in glass-ceramics reached ∼38.7 %. Phase separation induced the glass crystallization and had a significant effect on the distribution of PbSe QDs. To study the growth kinetics of PbSe QDs, the glasses were heat treated at 480 °C and 500 °C for various durations. The average diameters of PbSe QDs (D) showed exponential relationship to the growth time (t), described by the equation D(t)∼ t x. In rapid growth stage, the growth exponents x is ∼0.56 at 480 °C and ∼0.47 at 500 °C, and then decrease to ∼0.13 and ∼0.10, respectively. The formation of a large number of LiAlO2 crystals in glass hindered the diffusion of semiconductor ions, which is the main reason for the decreasing in the growth rate of PbSe QDs." @default.
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- W3021010167 date "2020-09-01" @default.
- W3021010167 modified "2023-09-28" @default.
- W3021010167 title "Growth kinetics and optical properties of PbSe quantum dots in dual-phase lithium-aluminum-silicate glass ceramic" @default.
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- W3021010167 doi "https://doi.org/10.1016/j.jeurceramsoc.2020.04.049" @default.
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