Rear‐Illuminated Perovskite Photorechargeable Lithium Battery

Abstract

Photovoltaic power-conversion systems can harvest energy from sunlight almost perpetually whenever sun rays are accessible. Meanwhile, as indispensable energy storage units used in advanced technologies such as portable electronics, electric vehicles, and renewable/smart grids, batteries are energy-limited closed systems and require constant recharging. Fusing these two essential technologies into a single device would create sustainable power source. Here, it is demonstrated that such an integrated device can be realized by fusing a rear-illuminated single-junction perovskite solar cell with Li 4 Ti 5 O 12 -LiCoO 2 Li-ion battery, whose photo-charging is enabled by an This article is protected by copyright. All rights reserved. 2 electronic converter via voltage matching. This design facilitates a straightforward monolithic stacking of the battery on the solar cell using a common metal substrate which provides a robust mechanical isolation between the two systems while simultaneously providing an efficient electrical interconnection. This system delivers a high overall photoelectric conversion-storage efficiency of 7.3%, outperforming previous efforts on stackable integrated architectures with organic-inorganic photovoltaics. Furthermore, converter electronics facilitates system control with battery management and maximum power point tracking, which are inevitable for efficient, safe and reliable operation of practical loads. This work represents a significant advancement towards integrated photo-rechargeable energy storage systems as next generation power sources.

Vanadium Dioxide Cathodes for High‐Rate Photo‐Rechargeable Zinc‐Ion Batteries

“…Solar cells are oftentimes used in conjunction with batteries or supercapacitors to smooth out the intermittent nature of insolation, and interesting research has recently been undertaken in the integration of energy harvesting and storage technologies. [ 1–4 ] However, combining solar cells with electrochemical energy storage devices typically requires electronics to match the output of the energy harvester to the requirements of the storage systems. [ 5,6 ] This approach also adds to the device complexity and ohmic contact losses.…”

Grain Boundary Defect Passivation of Triple Cation Mixed Halide Perovskite with Hydrazine-Based Aromatic Iodide for Efficiency Improvement

“…Organic–inorganic halide perovskite material-based solar cells have been appealing mounting research interest due to their high-power conversion efficiency (PCE) and low-cost device manufacturing. − A decade of rigorous research on perovskite solar cells (PSCs) through film growth control, interface engineering, transport layer engineering, and perovskite compositional engineering has led to certified efficiency of 25.2%, which outperforms the widely deployed multicrystalline silicon and CIGS, CdTe thin-film technologies. − This has opened new doors toward low-cost solar-generated electricity. Halide perovskite has typically an ABX 3 structure, where A is an organic (MA, FA) or an inorganic (Cs) cation, B is a divalent cation (Pb, Sn), and X is a halide (Cl, Br, I). , The enhancement in power conversion efficiency (PCE) for perovskite solar cells can be largely credited to superior traits of the perovskites such as absorption coefficient, long charge carrier diffusion length, , high mobility, defect tolerance, and low exciton binding energy …”

Mitigating Open-Circuit Voltage Loss in Pb–Sn Low-Bandgap Perovskite Solar Cells via Additive Engineering

“…An EQE measurement was carried out on a 74,125, Oriel, instrument in dark to avoid the possible effect from the background light. 70 The steady-state power output was obtained using the same arrangement as used for J−V curves, but the sweep mode was changed to the sampling mode with a defined sampling interval (5s). The transient photocurrent and photovoltage investigations were conducted utilizing a nitrogen laser (OBB's Model OL-4300) pulse at 377 nm to pump a dye laser (model 1011) for generating a short pulse.…”

“…An EQE measurement was carried out on a 74,125, Oriel, instrument in dark to avoid the possible effect from the background light . The steady-state power output was obtained using the same arrangement as used for J – V curves, but the sweep mode was changed to the sampling mode with a defined sampling interval (5s).…”