Journal
SMALL
Volume 19, Issue 11, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202206852
Keywords
dendritic nanopolymers; perovskite; resistive random-access memory; supramolecular frameworks
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In this study, a 3D supramolecular framework (3D-SF) was constructed to regulate the performance of perovskite resistive random-access memory (RRAM). The 3D-SF improved the stability and resistive switching capability of the RRAM device, making it a potential candidate for high-density data storage.
The 3D supramolecular framework (3D-SF) is constructed in this work through the hydrogen bond assisted self-assembly of spherical dendritic nanopolymer to regulate the flexibility, stability, and resistive switching (RS) performance of perovskite resistive random-access memory (RRAM). Herein, the 3D-SF network acts as the perovskite crystallization template to regulate the perovskite crystallization process due to its coordination interaction of functional groups with the perovskite grains, presenting the uniform, pinhole-free, and compact perovskite morphology for stable flexible RRAM. The 3D-SF network in situ stays at the perovskite intergranular boundaries to crosslink the perovskite grains. The RS performance of 3D-SF-modified perovskite RRAM device is evidently improved to the ON/OFF ratio of 10(5), the cycle number of 500 times, and the data retention time of 10(4) s. The 50-days exposure of unencapsulated RRAM device at ambient environment still makes the ON/OFF ratio to be kept at approximate to 10(4), indicating the potential of long-term stable multilevel storage in the high-density data storage. The bending action under different radius also does not change the RS performance due to the excellent bending-resistant ability of 3D-SF-modified perovskite film. This work explores a novel polymer additive strategy to construct the 3D supramolecular framework for stable flexible perovskite optoelectronic devices.
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