Gate-Optimized Thermoelectric Power Factor in Ultrathin WSe2 Single Crystals
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- 作者：Masaro Yoshida ; Takahiko Iizuka ; Yu Saito ; Masaru Onga ; Ryuji Suzuki ; Yijin Zhang ; Yoshihiro Iwasa ; Sunao Shimizu
- 刊名：Nano Letters
- 出版年：2016
- 出版时间：March 9, 2016
- 年：2016
- 卷：16
- 期：3
- 页码：2061-2065
- 全文大小：363K
- ISSN：1530-6992
文摘
We report an electric field tuning of the thermopower in ultrathin WSe2 single crystals over a wide range of carrier concentration by using electric double-layer (EDL) technique. We succeeded in the optimization of power factor not only in the hole but also in the electron side, which has never been chemically accessed. The maximized values of power factor are one-order larger than that obtained by changing chemical composition, reflecting the clean nature of electrostatic doping.