Formation of a heterojunction by electrophoretic deposition of CdTe/CdSe nanoparticles from an exhaustible source
- 作者：Elisabeth Zillner ; Elisabeth.zillner@helmholtz-berlin.de ; Jaison Kavalakkatt ; Bjö ; rn Eckhardt ; Thomas Dittrich ; Ahmed Ennaoui ; Martha Lux-Steiner
- 关键词：Electrophoretic deposition ; Nanoparticle ; Surface photovoltage
- 刊名：Thin Solid Films
- 出版年：2012
- 期刊代码：78_00406090
- 类别：ph
- 出版时间：30 June, 2012
- 卷：520
- 期：17
- 页码：5500-5503
- 文件大小：737 K
摘要
Fast and well controlled electrophoretic deposition of CdTe and CdSe nanoparticle (CdTe-np and CdSe-np) layers and nanoparticle layer systems from an exhaustible source has been demonstrated. Using a small volume of pyridine based nanoparticle suspensions with varying concentrations, these were completely drained of nanoparticles during deposition. Our proposed approach is well suited to a practical realization of engineering materials with different band gaps for various promising applications such as fabrication of nanodevices. The formation of a charge selective contact across the CdTe-np/CdSe-np heterojunction was investigated by surface photovoltage methods and evidence of the separation of charge carriers at a CdTe-/CdSe-np heterojunction in鈥恇etween was demonstrated.