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In the realm of optoelectronic applications, the incorporation of a metal
interlayer between layers of a topological material holds significant potential.
The interlayer introduces benefits such as improved charge transfer efficiency,
tunable band alignment, plasmonics effect, and enhanced light-matter
interactions, paving the way for more efficient and versatile optoelectronic
devices. This work explores the incorporation of gold between Bi2Se3,
resulting in an enhancement in the response time of photoresponse of
interlayered systems (Bi2Se3-Au-Bi2Se3). The introduction of a gold interlayer
between Bi2Se3 significantly influences the overlayer structure, crystallinity,
crystallite size, and even phonon behavior. Moreover, the responsivity of the
interlayered device at a bias (2 V) is found to have high responsivity with fast
response and decay time (𝝉r = 0.1 ms, and 𝝉d = 24 ms of interlayered
systems) as compared to intrinsic Bi2Se3(𝝉r = 0.6 ms, and 𝝉d = 28 ms). This
change is attributed to the bandgap alteration of the Bi2Se3/Au interface,
which is monitored through transient spectroscopy performed at different
electric biases. This study suggests that incorporating a gold interlayer holds
potential benefits for various optoelectronic applications.

権利情報:

• In Copyright
  

  This is the pre-peer reviewed version of the following article: S. K. Saini, P. Sharma, S. Gautam, S. Verma, K. Kumar, A. Gupta, J. S. Tawale, S. Husale, S. S. Kushvaha, S. Walia, R. K. Singh, S. Bano, T. Mori, M. Kumar, Unveiling Electric Field Induced Ultrafast Charge Transfer Dynamics and Photoresponse Enhancement in Gold-Interlayered Bi2Se3. Adv. Optical Mater. 2024, 12, 2302478, which has been published in final form at https://doi.org/10.1002/adom.202302478. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.

キーワード: thermoelectric

刊行年月日: 2024-03-02

出版者: Wiley

掲載誌:

• Advanced Optical Materials (ISSN: 21951071) vol. 12 issue. 11 2302478

研究助成金:

原稿種別: 査読前原稿 (Author's original)

MDR DOI: https://doi.org/10.48505/nims.4806

公開URL: https://doi.org/10.1002/adom.202302478

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更新時刻: 2024-10-08 16:30:33 +0900

MDRでの公開時刻: 2024-10-08 16:30:33 +0900