Study of Electronic Defects in CdSe Quantum Dots and Their Involvement in Quantum Dot Solar Cells

被引：62

作者：

Loef, Ruben ^{[1
]}

Houtepen, Arjan J. ^{[1
]}

Talgorn, Elise ^{[1
]}

Schoonman, Joop ^{[1
]}

Goossens, Albert ^{[1
]}

机构：

[1] Delft Univ Technol, NL-2628 BL Delft, Netherlands

来源：

NANO LETTERS | 2009年 / 9卷 / 02期

关键词：

SIZE DEPENDENCE; TIO2; FILMS; BAND-GAP; NANOCRYSTALS; SEMICONDUCTOR; EFFICIENCY; PHOTOSENSITIZATION; ABSORPTION; CONDUCTION; ENERGY;

D O I：

10.1021/nl803738q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

To enhance efficiencies of quantum dot CdSe/TiO(2) based solar cells, understanding of the space charge at the CdSe/TiO(2) interface is crucial. In this paper, the presence of a shallow acceptor in the CdSe quantum dots is found by means of a detailed impedance and Mott-Schottky (C(-2)-phi) study. Furthermore, it is clearly shown that this acceptor density decreases strongly with increasing quantum dot size. The presence of these defect states may give rise to Auger recombination in small quantum dots and therewith decrease the efficiency of quantum-dot-sensitized solar cells.

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页码：856 / 859

页数：4

相关论文

共 31 条

[1] A NEW APPROACH TO HIGH-EFFICIENCY MULTI-BAND-GAP SOLAR-CELLS [J].

BARNHAM, KWJ ;

DUGGAN, G .

JOURNAL OF APPLIED PHYSICS, 1990, 67 (07) :3490-3493

[2] High efficiency of CdSe quantum-dot-sensitized TiO2 inverse opal solar cells [J].

Diguna, Lina J. ;

Shen, Qing ;

Kobayashi, Junya ;

Toyoda, Taro .

APPLIED PHYSICS LETTERS, 2007, 91 (02)

[3] COULOMB GAP AND LOW-TEMPERATURE CONDUCTIVITY OF DISORDERED SYSTEMS [J].

EFROS, AL ;

SHKLOVSKII, BI .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1975, 8 (04) :L49-L51

[4] Charge injection and transport in films of CdSe nanocrystals [J].

Ginger, DS ;

Greenham, NC .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (03) :1361-1368

[5] Reappraisal of Variable-Range Hopping in Quantum-Dot Solids [J].

Houtepen, Arjan J. ;

Kockmann, Daan ;

Vanmaekelbergh, Daniel .

NANO LETTERS, 2008, 8 (10) :3516-3520

[6] Size dependence of second harmonic generation in CdSe nanocrystal quantum dots [J].

Jacobsohn, M ;

Banin, U .

JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (01) :1-5

[7] X-RAY PHOTOELECTRON-SPECTROSCOPY OF CDSE NANOCRYSTALS WITH APPLICATIONS TO STUDIES OF THE NANOCRYSTAL SURFACE [J].

KATARI, JEB ;

COLVIN, VL ;

ALIVISATOS, AP .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (15) :4109-4117

[8] Quantum dot solar cells.: Tuning photoresponse through size and shape control of CdSe-TiO2 architecture [J].

Kongkanand, Anusorn ;

Tvrdy, Kevin ;

Takechi, Kensuke ;

Kuno, Masaru ;

Kamat, Prashant V. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (12) :4007-4015

[9] On the absorption cross section of CdSe nanocrystal quantum dots [J].

Leatherdale, CA ;

Woo, WK ;

Mikulec, FV ;

Bawendi, MG .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (31) :7619-7622

[10] CdSe quantum dot-sensitized solar cells exceeding efficiency 1% at full-sun intensity [J].

Lee, Hyo Joong ;

Yum, Jun-Ho ;

Leventis, Henry C. ;

Zakeeruddin, Shaik M. ;

Haque, Saif A. ;

Chen, Peter ;

Seok, Sang Il ;

Graetzel, Michael ;

Nazeeruddin, Md. K. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (30) :11600-11608

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