Memristive perovskite solar cells towards parallel solar energy harvesting and processing-in-memory computing

Rogdakis, Konstantinos; Loizos, Michalis; Viskadouros, George; Kymakis, Emmanuel

doi:10.1039/d2ma00402j

Cited by 11 publications

(23 citation statements)

References 59 publications

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“…However, we show that our results provide experimental confirmation of the predictions by mimicking another example of spike-rate-dependent plasticity. In the case of our pulse stimulus, with a time interval of a few milliseconds, the effect on negative current, shown in the zoomed-in graph of figure 6(b), is reported, resulting in an enhancement of synaptic current [48]. The simulation results in negative discharge spikes that slightly decrease as the time increases, which is consistent with the experimental trend (cf Figure 4(b) and see methods section).…”

Section: Simulation Of the Potentiation Process From The Electrical C...supporting

confidence: 83%

Long-term potentiation mechanism of biological postsynaptic activity in neuro-inspired halide perovskite memristors

Hernández‐Balaguera

Muñoz-Díaz

Bou

et al. 2023

Neuromorph. Comput. Eng.

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Perovskite memristors have emerged as leading contenders in brain-inspired neuromorphic electronics. Although these devices have been shown to accurately reproduce synaptic dynamics, they pose challenges for in-depth understanding of the underlying nonlinear phenomena. Potentiation effects on the electrical conductance of memristive devices have attracted increasing attention from the emerging neuromorphic community, demanding adequate interpretation. Here, we propose a detailed interpretation of the temporal dynamics of potentiation based on nonlinear electrical circuits that can be validated by impedance spectroscopy. The fundamental observation is that the current in a capacitor decreases with time; conversely, for an inductor, it increases with time. There is no electromagnetic effect in a halide perovskite memristor, but ionic-electronic coupling creates a chemical inductor effect that lies behind the potentiation property. Therefore, we show that beyond negative transients, the accumulation of mobile ions and the eventual penetration into the charge-transport layers constitute a bioelectrical memory feature that is the key to long-term synaptic enhancement. A quantitative dynamical electrical model formed by nonlinear differential equations explains the memory-based ionic effects to inductive phenomena associated with the slow and delayed currents, invisible during the “off mode” of the presynaptic spike-based stimuli. Our work opens a new pathway for the rational development of material mimesis of neural communications across synapses, particularly the learning and memory functions in the human brain, through a Hodgkin-Huxley-style biophysical model.

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Section: Simulation Of the Potentiation Process From The Electrical C...supporting

confidence: 83%

Long-term potentiation mechanism of biological postsynaptic activity in neuro-inspired halide perovskite memristors

Hernández‐Balaguera

Muñoz-Díaz

Bou

et al. 2023

Neuromorph. Comput. Eng.

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“…Recently, two‐terminal memristors have gained the attention of the scientific community because they act as single synaptic units with high scalability, fast switching speeds, and 3D integration capability. [ 3 ] Moreover, the operating mechanisms of these organic materials are consistent with human physiology and their mechanical properties match those of tissue. [ 4 ] However, exploiting the interesting nature of organic materials and designing and implementing single nanodevices with multifunctionalities remain challenging.…”

Section: Introductionmentioning

confidence: 86%

“…In addition, the cell demonstrated stable endurance and retention of 3 × 10 3 cycles and 3600 s, with basic synaptic functionalities. [3] Similarly, Loizos et al deployed a wide variety of synaptic properties of a four-cation RbCsFAMA perovskite device across an inverted solar cell geometry. [6] In addition, a multifunctional device based on n-perovskite/p-spiro-MeOTAD p-n heterojunction diode that enables the integration of photovoltaic, photodetection, and synaptic functionalities in a single cell has been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

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Flexible Memristive Organic Solar Cell Using Multilayer 2D Titanium Carbide MXene Electrodes

et al. 2023

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Hybrid systems have attracted significant attention within the scientific community due to their multifunctionality, which has resulted in increasing demands for wearable electronics, green energy, and miniaturization. Furthermore, MXenes are promising two‐dimensional materials that have been applied in various areas due to their unique properties. Herein, a flexible, transparent, and conductive electrode (FTCE) based on a multilayer hybrid MXene/Ag/MXene structure that can be applied to realize an inverted organic solar cell (OSC) with memory and learning functionalities is reported. This optimized FTCE exhibits high transmittance (84%), low sheet resistance (9.7 Ω sq−1), and reliable operation (even after 2000 bending cycles). Moreover, the OSC using this FTCE achieves a power conversion efficiency of 13.86% and sustained photovoltaic performance, even after hundreds of switching cycles. The fabricated memristive OSC (MemOSC) device also exhibits reliable resistive switching behavior at low operating voltages of 0.60 and −0.33 V (similar to biological synapses), an excellent ON/OFF ratio (103), stable endurance performance (4 × 103), and memory retention properties (104 s). Moreover, the MemOSC device can mimic synaptic functionalities on a biological time scale. Thus, MXene can potentially be used as an electrode for highly efficient OSCs with memristive functions for future intelligent solar cell modules.

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“…Another major application of pulse measurements for memristors is to characterize the synaptic weight updating, especially for neuromorphic computing applications. [109][110][111][112][113][114][115][116] Typical plots of synaptic weight updating process are displayed in Fig. 5c.…”

Section: Pulsementioning

confidence: 99%

Enhancing memristor fundamentals through instrumental characterization and understanding reliability issues

et al. 2023

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Memristive perovskite solar cells towards parallel solar energy harvesting and processing-in-memory computing

Abstract: The peculiar ions and carriers heterogeneity observed in hybrid organic / inorganic materials is the source of their emergent cross-coupled light and electric field tuneable functions with potential utility in...

Cited by 11 publications

References 59 publications

Long-term potentiation mechanism of biological postsynaptic activity in neuro-inspired halide perovskite memristors

Long-term potentiation mechanism of biological postsynaptic activity in neuro-inspired halide perovskite memristors

Flexible Memristive Organic Solar Cell Using Multilayer 2D Titanium Carbide MXene Electrodes

Enhancing memristor fundamentals through instrumental characterization and understanding reliability issues

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