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http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/8927
Title: | Air processed Cs2AgBiBr6 lead‑free double perovskite high‑mobility thin‑flm feld‑efect transistors |
Authors: | Abiram, G. HeidariGourji, F. Pitchaiya, S. Ravirajan, P. Murugathas, T. Velauthapillai, D. |
Issue Date: | 2022 |
Publisher: | Scientifc Reports |
Abstract: | This study focuses on the fabrication and characterization of Cs2AgBiBr6 double perovskite thin flm for feld-efect transistor (FET) applications. The Cs2AgBiBr6 thin flms were fabricated using a solution process technique and the observed XRD patterns demonstrate no difraction peaks of secondary phases, which confrm the phase-pure crystalline nature. The average grain sizes of the spin-deposited flm were also calculated by analysing the statistics of grain size in the SEM image and was found to be around 412 (± 44) nm, and larger grain size was also confrmed by the XRD measurements. FETs with diferent channel lengths of Cs2AgBiBr6 thin flms were fabricated, under ambient conditions, on heavily doped p-type Si substrate with a 300 nm thermally grown SiO2 dielectric. The fabricated Cs2AgBiBr6 FETs showed a p-type nature with a positive threshold voltage. The on-current, threshold voltage and hole-mobility of the FETs decreased with increasing channel length. A high average hole mobility of 0.29 cm2 s−1 V−1 was obtained for the FETs with a channel length of 30 µm, and the hole-mobility was reduced by an order of magnitude (0.012 cm2 s−1 V−1) when the channel length was doubled. The on-current and hole-mobility of Cs2AgBiBr6 FETs followed a power ft, which confrmed the dominance of channel length in electrostatic gating in Cs2AgBiBr6 FETs. A very high-hole mobility observed in FET could be attributed to the much larger grain size of the Cs2AgBiBr6 flm made in this work |
URI: | http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/8927 |
Appears in Collections: | Physics |
Files in This Item:
File | Description | Size | Format | |
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Air processed Cs2AgBiBr6 lead‑free.pdf | 1.8 MB | Adobe PDF | View/Open |
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