Charge transport in mixed CdSe and CdTe colloidal nanocrystal films

被引：47

作者：

Geyer, Scott ^{[1
]}

Porter, Venda J. ^{[1
]}

Halpert, Jonathan E. ^{[1
]}

Mentzel, Tamar S. ^{[2
]}

Kastner, Marc A. ^{[2
]}

Bawendi, Moungi G. ^{[1
]}

机构：

[1] MIT, Dept Chem, Cambridge, MA 02139 USA

[2] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 15期

基金：

美国国家科学基金会;

关键词：

SOLAR-CELLS; EFFICIENCY;

D O I：

10.1103/PhysRevB.82.155201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the influence of trap states on charge transport through films of mixed CdTe and CdSe nanocrystals (NCs) between lateral electrodes, through layered films of CdTe and CdSe NCs in a layered geometry, and through films of CdTe/CdSe nanobarbells in a layered geometry. We find that an electron trapping state on the surface of the CdTe NCs dominates the conduction in all devices studied. X-ray photoelectron spectroscopy and thermal activation studies implicate unpassivated or oxidized Te as the electron-trapping site.

引用

页数：8

共 27 条

[1]

[Anonymous], 2004, The Story of Semiconductors

[2] Relations between the photoluminescence efficiency of CdTe nanocrystals and their surface properties revealed by synchrotron XPS [J].