Перейти к основному содержанию
AkademIndex

Продукты

Для разработчиков

AkademBaseОткрытый API экосистемы
Статья

Europium-Doped Lead-Free Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> Perovskite Quantum Dots and Ultrasensitive Cu<sup>2+</sup> Detection

Nan DingState Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People’s Republic of ChinaDonglei ZhouState Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People’s Republic of ChinaGencai PanState Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People’s Republic of ChinaWen XuState Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People’s Republic of ChinaXu ChenState Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People’s Republic of ChinaDongyu LiState Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People’s Republic of ChinaXiaohui ZhangCollege of Physics, Jilin University, 2699 Qianjin Street, Changchun 130012, People’s Republic of ChinaJinyang ZhuCollege of Physics, Jilin University, 2699 Qianjin Street, Changchun 130012, People’s Republic of ChinaYanan JiState Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People’s Republic of ChinaHongwei SongState Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People’s Republic of China
2019en
ABI

Аннотация

Pollution triggered by highly toxic heavy metal ions has become of worldwide critical concern; thus, it is urgent to develop an eco-friendly and nontoxic fluorescence probe for metal ions sensing. The lead-free all-inorganic perovskite quantum dots (PeQDs) could be ideal candidates but are limited by their low photoluminescence quantum yield (PLQY). In this work, we successfully fabricated Eu3+-doped lead-free Cs3Bi2Br9 PeQDs employing a modified ligand-assisted reprecipitation method. The Cs3Bi2Br9:Eu3+ PeQDs demonstrate multicolor emissions including the exciton emission of the PeQDs and the5D0–7FJ transition for Eu3+ ion. Compared to the bare Cs3Bi2Br9 PeQDs, the Eu3+-doped PeQDs display highly improved PLQY from 18% to ∼42.4% and excellent water stability. Finally, nontoxic and highly efficient Cs3Bi2Br9:Eu3+ PeQDs were employed as a highly sensitive fluorescent probe for Cu2+ ion detection in water, which demonstrates a good linear range from 5 nM to 3 μM with a correlation coefficient of 0.996 and a low detection limit of 10 nM. Our work not only provides a new strategy to improve the optical performance of lead-free PeQDs but also expands their applications for metal ions sensing.

Перевод пока недоступен

Идентификаторы

DOI
10.1021/acssuschemeng.9b00038

Цитирования и источники

Цитирований: 2Использованных источников: 0
Показатели — AkademScholar