Depth Profiling Photoelectron-Spectroscopic Study of an Organic Spin Valve with a Plasma-Modified Pentacene Spacer
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- 作者：Jhen-Yong Hong ; Yin-Ming Chang ; Cheng-Hao Chuang ; Kai-Shin Li ; You-Cih Jhang ; Hung-Wei Shiu ; Chia-Hao Chen ; Wen-Chung Chiang ; Minn-Tsong Lin
- 刊名：The Journal of Physical Chemistry C
- 出版年：2012
- 出版时间：October 11, 2012
- 年：2012
- 卷：116
- 期：40
- 页码：21157-21161
- 全文大小：304K
- 年卷期：v.116,no.40(October 11, 2012)
- ISSN：1932-7455
文摘
We report an enhanced magnetoresistance (MR) in an organic spin valve with an oxygen plasma-treated pentacene (PC) spacer. The spin valve containing PC without the treatment shows no MR effect, whereas those with moderately plasma-treated PC exhibit MR ratios up to 1.64% at room temperature. X-ray photoelectron spectroscopy with depth profiling is utilized to characterize the interfacial electronic properties of the plasma-treated PC spacer which shows the formation of a derivative oxide layer. The results suggest an alternative approach to improve the interface quality and in turn to enhance the MR performance in organic spin valves.