Light harvesting photovoltaic mini‐generator

Bermejo, Sandra; Silvestre, S.; Ortega, Pablo; Herrera, G.

doi:10.1002/pip.1162

Cited by 4 publications

(2 citation statements)

References 27 publications

(38 reference statements)

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“…Another triple‐junction solar cells made of amorphous and microcrystalline silicon was used to charge a lithium‐ion battery and demonstrate the potential of an integrated solar cell‐to‐battery cell monolithic device, with a battery capacity of 0.15 mAh and overall efficiency of 8.8% . Moreover, a silicon‐on‐insulator manufacturing process was introduced to fabricate multiple solar cells and scale up the overall cell voltage; here, an array of 25 cells has been integrated with a microbattery to act as a mini generator, producing a maximum power of 1.7 mW. The open circuit voltage of the solar cells could be scaled from 3.6 V (nine cells) until 101.5 V if 169 cells are connected in series.…”

Section: Low‐power Pv‐storage Devicesmentioning

confidence: 99%

Integrating a photovoltaic storage system in one device: A critical review

Vega‐Garita

Ramírez-Elizondo

Narayan

et al. 2018

Progress in Photovoltaics

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Due to the variable nature of the photovoltaic generation, energy storage is imperative, and the combination of both in one device is appealing for more efficient and easy-to-use devices.Among the myriads of proposed approaches, there are multiple challenges to overcome to make these solutions realistic alternatives to current systems. This paper classifies and identifies previous efforts to achieve integrated photovoltaic storage devices. Moreover, the gaps and future perspectives are analysed to give an overview of the field, paying attention to low-power devices (<10 W) as well as high-power devices (>10 W). We focus on devices that combine solar cells with supercapacitors or batteries, providing information about the structure, materials used, and performance. On the one hand, small power devices must concentrate on including power electronics to increase the efficiency of the system as well as ensuring a safe operation; likewise, more attention should be drawn to validate the feasibility of novel concepts by carrying out more realistic and standardised tests, including long-term testing. On the other hand, high-power devices must be researched thoroughly to evaluate the impact of high temperatures on energy storage and solar module ageing; furthermore, optimum system sizing is a relevant topic that deserves attention and its relation to modular solutions. This critical literature review serves as a guide to understand the characteristics of the approaches followed to integrate photovoltaic devices and storage in one device, shedding light on the improvements required to develop more robust products for a sustainable future. KEYWORDS battery, one device, PV-storage integration, solar-battery integration, solar energy, supercapacitor 1 INTRODUCTION Solar photovoltaic (PV) energy generation is highly dependent on weather conditions, making solar power intermittent and many times unreliable. Moreover, energy demand is widespread during the day, and solar energy is available for few hours, provoking a mismatch between demand and supply. These two issues are the driving force behind the use of energy storage (ES) devices, which help decrease the fluctuations from the generation side but also provide the possibility of performing ancillary services. Consequently, it is fundamental to find the most appropriate energy storage device for particular applications and operational conditions.According to the characteristics of ES devices, the criterion that defines when the energy is stored and utilised may vary, even for the same component. Some ES devices can supply power during extended periods (hours, days), while others are more suitable for shorter periods of operation (seconds, minutes). For instance, rapid changes in PV power due to rapidly changing illumination conditions can be smoothed using supercapacitors (SCs); they deliver power when solar supply is scarce, so the load is still satisfied. For devices with lower self-discharging values like electrochemical cells (batteries), the electrical energy produced by...

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Section: Low‐power Pv‐storage Devicesmentioning

confidence: 99%

Integrating a photovoltaic storage system in one device: A critical review

Vega‐Garita

Ramírez-Elizondo

Narayan

et al. 2018

Progress in Photovoltaics

View full text Add to dashboard Cite

show abstract

“…Cell interconnection is carried out through the front side of the wafer, following a design similar to that of Figure 2-e, in which a buried oxide is used to isolate the active layers of the device. In another work from this same group [55] a microbattery is assembled to the module for low power-high voltage implantable applications: they exhibit a V oc of 99 V and a power density of 4.8 mW/cm 2 [56].…”

Section: Si-based Mimsmentioning

confidence: 99%