Measurement dataset for the on-chip solar cells and the on-chip power sources fabricated from them
Description
This dataset is divided into four files: Measurement results of the load curve for three types of surface electrodes. Measurement results of the load curve and power curve for the two 0.01mm² triple-well on-chip solar cells. Conversion efficiency from the incident end to the output end and output voltage variation with illumination. The variation of the output voltage and power of the energy harvesting power source with the load. File 1 shows the impact on the load curve (capability) of the on-chip square solar cell when using a large metal ring (RE1), a medium-sized metal ring (RE2), and a small central metal block (CE) as the surface electrodes. File 2 presents the measurement results. Device I represents a conventional unsegmented triple-well on-chip solar cell with a 0.01mm² footprint area. Device II refers to the proposed on-chip solar cell with optimized surface electrodes. The measurement results reveal the superior performance of the proposed on-chip solar cell with optimized surface electrodes, particularly in terms of its photovoltaic conversion efficiency, which is 25.79%. It's worth noting that the calculation of the photovoltaic conversion efficiency is based on the footprint area of the on-chip solar cell. The conventional unsegmented on-chip solar cell achieves a maximum conversion efficiency of 21.95%. File 3 presents the relationship between the output voltage and output power of the on-chip power source and the load size. The measurement results indicate that under 100kLux illumination from the solar simulator, the output voltage of the on-chip power source is maintained between 1.05V and 0.91V as the load current changes from 0 to 1.11μA. In this scenario, the power source can provide a maximum output power of 1.01μW to the application module of microsensors. File 4 demonstrates the conversion efficiency from the incident light power to the output power of the on-chip power source under different light intensities, with an average conversion efficiency of around 9.45%, where the highest conversion efficiency reaches 10.20% at 120kLux.
Files
Steps to reproduce
The on-chip solar cells and energy harvesting system were designed using Virtuoso software and fabricated by a wafer foundry using a 0.18μm bulk CMOS process. Electrical measurements were conducted with a Keysight Technologies B2910BL single-channel source meter. The illumination environment was provided by a PL-X500D simulated sunlight xenon lamp from Beijing Princes Science and Technology Co., Ltd., capable of producing sunlight intensities ranging from 20klux to 120klux, and equipped with an AM1.5 filter.