Integrated on-chip solar cell power supply system

Abstract

The invention belongs to the technical field of solar energy and provides an integrated on-chip solar cell power supply system. The purposes are to improve the overall efficiency of an on-chip power supply system, and provide lasting and stable energy supplies for micro power consumption systems such as radio frequency identification and wireless sensor network nodes. According to the technical scheme, the integrated on-chip solar cell power supply system comprises a set of solar cell units, an energy collecting module, a control circuit and a linear stabilizer, wherein the solar cell units are connected in parallel by the adoption of a metal interconnection technology, the energy collecting module comprises a ring oscillator, charge pumps connected in series in a multi-stage mode and an energy storage capacitor, and the linear stabilizer comprises a starting circuit, a band-gap reference and an operational amplifier and is used for providing stable working voltage VDD for a load circuit. The integrated on-chip solar cell power supply system is mainly applied to designing and manufacturing solar cells.

Description

technical field [0001] The invention belongs to the technical field of solar energy, and relates to an on-chip solar cell compatible with a complementary metal oxide semiconductor (CMOS) process, and a power management system integrating the on-chip solar cell, specifically, an on-chip integrated solar cell power supply system. Background technique [0002] With the deteriorating global ecological environment and the increasing shortage of traditional petrochemical energy, there is an urgent need for a clean, pollution-free and abundant new energy to promote the sustainable development of human civilization and social economy. one of the scientific problems. [0003] At present, the academic community has reported the use of various energy harvesting methods such as mechanical vibration, temperature gradient and solar energy. Compared with other energy acquisition methods, solar cells using light as an energy source have high conversion efficiency, mature technology, and no...

AI Technical Summary

Problems solved by technology

However, limited by the silicon-based standard CMOS process, the reverse leakage loss of the substrate parasitic diode of the on-chip solar cell is significant, and it is still difficult to find an effective isolation method to eliminate the influence of the substrate

Therefore, the micro solar cells based on the standard CMOS process mostly use the parallel connection of cells to increase the output power, so the open circuit output voltage is low (usually around 0.5V)

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