Charge Separation in Type II Tunneling Multi layered Structures of CdTe and CdSe Nanocrystals Directly Proven by Surface Photovoltage Spectroscopy

被引：131

作者：

Gross, Dieter ^{[1
,2
]}

Mora-Sero, Ivan ^{[3
]}

Dittrich, Thomas ^{[4
]}

Belaidi, Abdelhak ^{[4
]}

Mauser, Christian ^{[1
,2
]}

Houtepen, Arjan J. ^{[1
,2
,5
]}

Da Como, Enrico ^{[1
,2
]}

Rogach, Andrey L. ^{[6
]}

Feldmann, Jochen ^{[1
,2
]}

机构：

[1] Univ Munich, Photon & Optoelect Grp, Dept Phys, D-80799 Munich, Germany

[2] Univ Munich, CeNS, D-80799 Munich, Germany

[3] Univ Jaume 1, Dept Fis, E-12071 Castellon de La Plana, Spain

[4] Helmholtz Zentrum Berlin Mat & Energie, D-14109 Berlin, Germany

[5] Delft Univ Technol, Dept Chem Engn, Optoelect Mat Sect, NL-2628 BL Delft, Netherlands

[6] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 17期

关键词：

SOLAR-CELLS; FILMS; POLYMER; ENERGY;

D O I：

10.1021/ja101629c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Charge separation and diffusion in type II multilayered structures of CdTe and CdSe nanocrystals with a polymer spacer are unambiguously proven by surface photovoltage spectroscopy. Holes accumulate in CdTe nanocrystal layers, and the electrons in CdSe nanocrystal layers. An increase of thickness of the polymer spacer strongly decreases the charge separation efficiency. Surface photovoltage transients demonstrate diffusion of the separated charges over several layers of the same kind of nanocrystals.

引用

页码：5981 / +

页数：5

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