Stability Study of PbSe Semiconductor Nanocrystals over Concentration, Size, Atmosphere, and Light Exposure

被引:67
作者
Dai, Quanqin [2 ]
Wang, Yingnan [1 ]
Zhang, Yu [2 ,4 ,5 ]
Li, Xinbi [2 ]
Li, Ruowang [2 ]
Zou, Bo [1 ]
Seo, JaeTae [3 ]
Wang, Yiding [4 ,5 ]
Liu, Manhong [6 ]
Yu, William W. [2 ]
机构
[1] Jilin Univ, State Key Lab Superhard Mat, Changchun 130012, Peoples R China
[2] Worcester Polytech Inst, Dept Chem & Biochem, Worcester, MA 01609 USA
[3] Hampton Univ, Dept Phys, Hampton, VA 23668 USA
[4] Jilin Univ, State Key Lab Integrated Oploelect, Changchun 130012, Peoples R China
[5] Jilin Univ, Coll Elect Sci & Engn, Changchun 130012, Peoples R China
[6] Qingdao Univ Sci & Techno, Coll Mat Sci & Engn, Qingdao 266042, Peoples R China
基金
美国国家科学基金会;
关键词
COLLOIDAL PBSE; QUANTUM DOTS; LUMINESCENCE; EMISSION; SELENIDE; BRIGHT;
D O I
10.1021/la9015614
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Infrared-emitting PbSe nanocrystals are of increasing interest in both fundamental research and technical application. However, the practical applications arc greatly limited by their poor stability. In this work, absorption and photoluminescence spectra of PbSe nanocrystals were utilized to observe the stability of PbSe nanocrystals over several conventional factors, that is, particle concentration, particle size, temperature, light exposure, contacting atmosphere, and storage forms (solution or solid powder). Both absorption and luminescence spectra of PbSe nanocrystals exposed to air showed dependence on particle concentration, size, and light exposure, which caused large and quick blue-shifts in the optical spectra. This air-contacted instability arising from the destructive oxidation and subsequent collision-induced decomposition was kinetically dominated and differed from the traditional thought that smaller particles with lower concentrations shrank fast. The photoluminescence emission intensity of the PbSe nanocrystal solution under ultraviolet (UV) exposure in air increased first and then decreased slowly; without UV irradiation, the emission intensity monotonously decreased over time. However, if stored under nitrogen, no obvious changes in absorption and photoluminescence spectra of the PbSe nanocrystals were observed even tinder UV exposure or upon being heated up to 100 degrees C.
引用
收藏
页码:12320 / 12324
页数:5
相关论文
共 43 条
[1]   Photochemical instability of CdSe nanocrystals coated by hydrophilic thiols [J].
Aldana, J ;
Wang, YA ;
Peng, XG .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (36) :8844-8850
[2]   Semiconductor nanocrystals as fluorescent biological labels [J].
Bruchez, M ;
Moronne, M ;
Gin, P ;
Weiss, S ;
Alivisatos, AP .
SCIENCE, 1998, 281 (5385) :2013-2016
[3]   Quantum dot bioconjugates for ultrasensitive nonisotopic detection [J].
Chan, WCW ;
Nie, SM .
SCIENCE, 1998, 281 (5385) :2016-2018
[4]  
COLVIN VL, 1994, NATURE, V370, P354, DOI 10.1038/370354a0
[5]   Photo-activated luminescence of CdSe quantum dot monolayers [J].
Cordero, SR ;
Carson, PJ ;
Estabrook, RA ;
Strouse, GF ;
Buratto, SK .
JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (51) :12137-12142
[6]   Optical properties of colloidal PbSe nanocrystals [J].
Du, H ;
Chen, CL ;
Krishnan, R ;
Krauss, TD ;
Harbold, JM ;
Wise, FW ;
Thomas, MG ;
Silcox, J .
NANO LETTERS, 2002, 2 (11) :1321-1324
[7]   Highly efficient multiple exciton generation in colloidal PbSe and PbS quantum dots [J].
Ellingson, RJ ;
Beard, MC ;
Johnson, JC ;
Yu, PR ;
Micic, OI ;
Nozik, AJ ;
Shabaev, A ;
Efros, AL .
NANO LETTERS, 2005, 5 (05) :865-871
[8]   Colloidal PbS nanocrystals with size-tunable near-infrared emission: Observation of post-synthesis self-narrowing of the particle size distribution [J].
Hines, MA ;
Scholes, GD .
ADVANCED MATERIALS, 2003, 15 (21) :1844-1849
[9]  
Huynh WU, 1999, ADV MATER, V11, P923, DOI 10.1002/(SICI)1521-4095(199908)11:11<923::AID-ADMA923>3.0.CO
[10]  
2-T