Spectral and temporal photoluminescence behavior of colloidal PbS quantum dots

Shoichi Kitamura,Masaya Senshu,H Tokushige,Tsukuru Katsuyama,Nobuhiko Ozaki,Issei Tanaka, Yuji Sugimoto

Superlattices and Microstructures（2015）

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摘要

•Time-dependent photoluminescence of the colloidal PbS quantum dots was studied.•A two-step decay following an initial fast luminescence change was observed.•The two-step decay behavior was the same for the dots with different distances.•It consisted of a fast non-radiative decay and an intrinsic slow radiative decay.•The importance of the non-radiative energy transfer path was newly indicated.

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关键词

Quantum dot,Colloid,PbS,Photoluminescence,Radiative decay,Non-radiative decay,Energy transfer,Defect

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