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Nanomaterials
Volume 15
Issue 3
10.3390/nano15030227
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Effect of Ammonium Salt on Conjugated Polyelectrolyte as an Interlayer for Organic–Inorganic Hybrid Perovskite Memristors

by
Eun Soo Shim
†,
Ji Hyeon Lee
†,
Ju Wan Park
,
Sun Woo Kim
,
Su Bin Park
and
Jea Woong Jo
*
Department of Energy and Materials Engineering, Dongguk University, 30 Pildong-ro, 1-gil, Jung-gu, Seoul 04620, Republic of Korea
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Nanomaterials 2025, 15(3), 227; https://doi.org/10.3390/nano15030227
Submission received: 31 December 2024 / Revised: 22 January 2025 / Accepted: 28 January 2025 / Published: 30 January 2025
(This article belongs to the Special Issue Nanomaterials for Energy Harvesting and Environmental Sensing Application)
Versions Notes

Abstract

Memristors are promising candidates for next-generation non-volatile memory devices, offering low power consumption and high-speed switching capabilities. However, conventional metal oxide-based memristors are constrained by fabrication complexity and high costs, limiting their commercial viability. Organic–inorganic hybrid perovskites (OIHPs), known for their facile solution processability and unique ionic–electronic conductivity, provide an attractive alternative. This study presents a conjugated polyelectrolyte (CPE), PhNa-1T, as an interlayer for OIHP memristors to enhance the high-resistance state (HRS) performance. A post-treatment process using n-octylammonium bromide (OABr) was further applied to optimize the interlayer properties. Devices treated with PhNa-1T/OABr achieved a significantly improved ON/OFF ratio of 2150, compared to 197 for untreated devices. Systematic characterization revealed that OABr treatment improved film morphology, reduced crystallite strain, and optimized energy level alignment, thereby reinforcing the Schottky barrier and minimizing current leakage. These findings highlight the potential of tailored interlayer engineering to improve OIHP-based memristor performance, offering promising prospects for applications in non-volatile memory technologies.
Keywords: conjugated polyelectrolyte; ammonium salt; organic–inorganic hybrid perovskite; memristor; interlayer conjugated polyelectrolyte; ammonium salt; organic–inorganic hybrid perovskite; memristor; interlayer

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MDPI and ACS Style

Shim, E.S.; Lee, J.H.; Park, J.W.; Kim, S.W.; Park, S.B.; Jo, J.W. Effect of Ammonium Salt on Conjugated Polyelectrolyte as an Interlayer for Organic–Inorganic Hybrid Perovskite Memristors. Nanomaterials 2025, 15, 227. https://doi.org/10.3390/nano15030227

AMA Style

Shim ES, Lee JH, Park JW, Kim SW, Park SB, Jo JW. Effect of Ammonium Salt on Conjugated Polyelectrolyte as an Interlayer for Organic–Inorganic Hybrid Perovskite Memristors. Nanomaterials. 2025; 15(3):227. https://doi.org/10.3390/nano15030227

Chicago/Turabian Style

Shim, Eun Soo, Ji Hyeon Lee, Ju Wan Park, Sun Woo Kim, Su Bin Park, and Jea Woong Jo. 2025. "Effect of Ammonium Salt on Conjugated Polyelectrolyte as an Interlayer for Organic–Inorganic Hybrid Perovskite Memristors" Nanomaterials 15, no. 3: 227. https://doi.org/10.3390/nano15030227

APA Style

Shim, E. S., Lee, J. H., Park, J. W., Kim, S. W., Park, S. B., & Jo, J. W. (2025). Effect of Ammonium Salt on Conjugated Polyelectrolyte as an Interlayer for Organic–Inorganic Hybrid Perovskite Memristors. Nanomaterials, 15(3), 227. https://doi.org/10.3390/nano15030227

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