Emission Recovery and Stability Enhancement of Inorganic Perovskite Quantum Dots

被引：120
|
作者：
Wang, Hua [1 ]
Sui, Ning [1 ]
Bai, Xue [2 ]
Zhang, Yu [2 ]
Rice, Quinton [3 ]
Seo, Felix Jaetae [3 ]
Zhang, Qingbo [4 ]
Colvin, Vicki L. [4 ]
Yu, William W. [1 ,2 ,5 ]
机构：
[1] Qingdao Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266042, Peoples R China
[2] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Jilin, Peoples R China
[3] Hampton Univ, Dept Phys, Adv Ctr Laser Sci & Spect, Hampton, VA 23668 USA
[4] Brown Univ, Dept Chem, Providence, RI 02912 USA
[5] Louisiana State Univ, Dept Chem & Phys, Shreveport, LA 71115 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2018年 / 9卷 / 15期
基金：
美国国家科学基金会;
关键词：
ROOM-TEMPERATURE; ANION-EXCHANGE; OPTICAL-PROPERTIES; NANOCRYSTALS; EFFICIENT; CSPBX3; CDSE; CL; BR; STABILIZATION;
D O I：
10.1021/acs.jpclett.8b01752
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：
Inorganic lead halide perovskite quantum dots (PQDs), especially red emission PQDs, are well-known to easily lose their luminescence emission with time, which shows from strong emission of fresh PQDs to no emission of aged PQDs. Here, we demonstrate that trioctylphosphine (TOP) can effectively and instantly recover the luminescence emission of aged red PQDs, making the "dead" PQDs "reborn". Furthermore, TOP also works to improve the emission intensity of freshly synthesized PQDs. In this process, TOP does not make any detectable structural changes to PQDs. Besides, TOP can effectively enhance the stability of PQDs against long-term storage, temperature, UV irradiation, and polar solvents. This unusual emission recovery and stability enhancement by TOP shall promote the understanding of particle surface conditions and the development of PQD devices.
引用
收藏
页码：4166 / 4173
页数：15
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