Ultrafast carrier dynamics in CuInS2 quantum dots

被引：41

作者：

Sun, Jianhui ^{[1
,2
,3
]}

Zhu, Dehua ^{[4
]}

Zhao, Jialong ^{[2
,4
]}

Ikezawa, Michio ^{[1
]}

Wang, Xiuying ^{[2
]}

Masumoto, Yasuaki ^{[1
]}

机构：

[1] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 3058571, Japan

[2] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Luminescence & Applicat, Changchun 130033, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100039, Peoples R China

[4] Wenzhou Univ, Coll Mech & Elect Engn, Wenzhou 325035, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 02期

基金：

中国国家自然科学基金;

关键词：

SEMICONDUCTOR NANOCRYSTALS; SOLAR-CELLS; ELECTROLUMINESCENCE; PERFORMANCE;

D O I：

10.1063/1.4862274

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The ultrafast carrier dynamics in CuInS2 (CIS) quantum dots (QDs) was studied by means of femtosecond transient absorption (TA) spectroscopy. The size-dependent 1S transition energy determined from bleaching spectra is in agreement with that calculated on the finite-depth-well model in the effective mass approximation. The TA bleaching comes from filling of electron quantized levels, allowing us to know the dynamics of the 1S electron in CIS QDs. The sub-100-ps electron trapping at surface defects in bare QDs accelerates with decreasing QD size, while is effectively suppressed in well-passivated CIS/ZnS core/shell QDs. (C) 2014 AIP Publishing LLC.

引用

页数：4

共 19 条

[1] Highly Emissive and Color-Tunable CuInS2-Based Colloidal Semiconductor Nanocrystals: Off-Stoichiometry Effects and Improved Electroluminescence Performance [J].

Chen, Bingkun ;

Zhong, Haizheng ;

Zhang, Wenqing ;

Tan, Zhan'ao ;

Li, Yongfang ;

Yu, Cairan ;

Zhai, Tianyou ;

Bando, Yoshio ;

Yang, Shengyi ;

Zou, Bingsuo .

ADVANCED FUNCTIONAL MATERIALS, 2012, 22 (10) :2081-2088

[2] Electroluminescence from single monolayers of nanocrystals in molecular organic devices [J].

Coe, S ;

Woo, WK ;

Bawendi, M ;

Bulovic, V .

NATURE, 2002, 420 (6917) :800-803

[3] Surface brightens up Si quantum dots: direct bandgap-like size-tunable emission [J].

Dohnalova, Katerina ;

Poddubny, Alexander N. ;

Prokofiev, Alexei A. ;

de Boer, Wieteke D. A. M. ;

Umesh, Chinnaswamy P. ;

Paulusse, Jos M. J. ;

Zuilhof, Han ;

Gregorkiewicz, Tom .

LIGHT-SCIENCE & APPLICATIONS, 2013, 2 :e47-e47

[4] Air-stable all-inorganic nanocrystal solar cells processed from solution [J].

Gur, I ;

Fromer, NA ;

Geier, ML ;

Alivisatos, AP .

SCIENCE, 2005, 310 (5747) :462-465

[5] Hybrid nanorod-polymer solar cells [J].

Huynh, WU ;

Dittmer, JJ ;

Alivisatos, AP .

SCIENCE, 2002, 295 (5564) :2425-2427

[6] Photoinduced Charge Separation and Recombination Processes in CdSe Quantum Dot and Graphene Oxide Composites with Methylene Blue as Linker [J].

Jing, Pengtao ;

Ji, Wenyu ;

Yuan, Xi ;

Ikezawa, Michio ;

Zhang, Ligong ;

Li, Haibo ;

Zhao, Jialong ;

Masumoto, Yasuaki .

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2013, 4 (17) :2919-2925

[7] Ultrafast carrier dynamics in semiconductor quantum dots [J].

Klimov, V ;

Bolivar, PH ;

Kurz, H .

PHYSICAL REVIEW B, 1996, 53 (03) :1463-1467

[8] BIEXCITON EFFECTS IN FEMTOSECOND NONLINEAR TRANSMISSION OF SEMICONDUCTOR QUANTUM DOTS [J].

KLIMOV, V ;

HUNSCHE, S ;

KURZ, H .

PHYSICAL REVIEW B, 1994, 50 (11) :8110-8113

[9]

Klimov V.I., 2004, SEMICONDUCTOR METAL

[10] Quantization of multiparticle Auger rates in semiconductor quantum dots [J].

Klimov, VI ;

Mikhailovsky, AA ;

McBranch, DW ;

Leatherdale, CA ;

Bawendi, MG .

SCIENCE, 2000, 287 (5455) :1011-1013

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