Investigation of electrical transport properties in solution-processed Bi2Se3-AgMnOOH nanocomposite

Rishika Chakraborty; Sutanu Das; Siddheswar Rudra; Arpan Kumar Nayak; Pradip K Maji; Upendranath Nandi; Mukul Pradhan

doi:10.1039/d3cp00642e

Investigation of electrical transport properties in solution-processed Bi₂Se₃-AgMnOOH nanocomposite

Phys Chem Chem Phys. 2023 May 24;25(20):14606-14617. doi: 10.1039/d3cp00642e.

Authors

Rishika Chakraborty¹, Sutanu Das², Siddheswar Rudra³, Arpan Kumar Nayak⁴, Pradip K Maji⁵, Upendranath Nandi², Mukul Pradhan⁶

Affiliations

¹ Department of Chemistry, National Institute of Technology Meghalaya, Shillong, 793003, Meghalaya, India.
² Department of Physics, Scottish Church College, 1 & 3 Urquhart Square, Kolkata, 700006, West Bengal, India. unphys@scottishchurch.ac.in.
³ Materials Science Centre, Indian Institute of Technology, Kharagpur 721302, India.
⁴ Department of Energy Engineering, Konkuk University, 120 Neungdong-ro, Seoul 05029, Republic of Korea.
⁵ Department of Polymer & Process Engineering, Indian Institute of Technology, Roorkee, Saharanpur Campus, Saharanpur, 247001, Uttar Pradesh, India.
⁶ Department of Chemistry, National Institute of Technology Warangal, Warangal, 506004, Telangana, India. mukulchem@gmail.com.

PMID: 37191300
DOI: 10.1039/d3cp00642e

Abstract

In this paper, we report the fundamental electrical transport properties measured in Bi₂Se₃-AgMnOOH nanocomposite disc, which is prepared for the first time by convenient low temperature solution-phase chemistry in conjunction with redox-mediated methodology. The comparative structural and morphological analyses for the nanocomposite with pristine Bi₂Se₃ are comprehensively investigated by different material characterization techniques. The results demonstrate the successful in situ composite fabrication between the Bi₂Se₃, Ag and γ-MnOOH components. Besides, the present work introduces a systematic approach for the examination of electrical transport properties in Ohmic and non-Ohmic regimes over a wide temperature range. The results from the room temperature transport measurement exhibited that the nanocomposite demonstrated non-linearity after a certain current I₀ (onset current), whereas Bi₂Se₃ was linear in the entire measured current range. An enhancement of the conductance was observed for Bi₂Se₃-AgMnOOH compared to the pure Bi₂Se₃ material, which is credited to the composite effect. The onset exponents x_T (DC conductance) and x_f (AC conductance) with phase-sensitive character demonstrate different values below and above 180 K separating two different phases with different conduction mechanisms. Also, flicker noise analysis established the correlation between the DC conductance in terms of Ohmic to non-Ohmic transition after the onset voltage V₀. This transition phenomenon from Ohmic to non-Ohmic behaviour is explained from the structural point of view of the nanocomposite. The present investigation highlights the importance of using the bottom-up solution-phase strategy for the synthesis of high quality Bi₂Se₃-based nanocomposites for transport studies and their possible future applications.