High photoluminescence quantum efficiency in near infrared of CdS nanocrystals in glass phosphate matrix

被引：9

作者：

Camilo, Nilmar S. ^{[1
]}

Messias, Djalmir N. ^{[1
]}

Pilla, Viviane ^{[1
]}

Silva, Anielle C. A. ^{[2
]}

Dantas, Noelio O. ^{[2
]}

Andrade, Acacio A. ^{[1
]}

机构：

[1] Univ Fed Uberlandia, Inst Fis, BR-38400902 Uberlandia, MG, Brazil

[2] Univ Fed Alagoas, Inst Fis, BR-57480000 Maceio, AL, Brazil

来源：

JOURNAL OF LUMINESCENCE | 2022年 / 249卷

关键词：

Nanocrystals; Cadmium sulfide; Photoluminescence quantum efficiency; Phosphate glass matrix; THERMAL LENS DETERMINATION; OPTICAL-ABSORPTION; DOTS; EMISSION; PBSE;

D O I：

10.1016/j.jlumin.2022.118956

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work measurements of photoluminescence quantum efficiency (eta) in CdS nanocrystals embedded in phosphate glass matrix was performed using the thermal lens technique. The study was performed, using two different excitation wavelengths, in three samples with average sizes of 5.1, 6.3 and 6.7 nm and emission around 980 nm. The emission was strongly dominated by surface trap states. The photoluminescence quantum efficiency obtained was up to 60% for the smallest nanocrystals. It was also observed that eta is independent of the excitation wavelength for each nanocrystal.

引用

页数：4

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