Pourshaban Erfan, Banerjee Aishwaryadev, Deshpande Adwait, Ghosh Chayanjit, Karkhanis Mohit U, Hasan Rabiul, Rock Nathan D, Kim Hanseup, Mastrangelo Carlos H
Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112, United States.
Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112, United States.
ACS Appl Electron Mater. 2022 Aug 23;4(8):4016-4022. doi: 10.1021/acsaelm.2c00665. Epub 2022 Aug 1.
Supplying electric power to wearable IoT devices, particularly smart contact lenses (SCLs), is one of the main obstacles to widespread adoption and commercialization. In the present study, we have successfully designed, fabricated, and characterized semi-transparent, self-supported, and flexible single crystalline silicon solar cells using a single-sided micromachining procedure. Optical, mechanical, and electrical simulations, together with the practical measurements, verify the application of our developed solar cells to be mounted on a limited-footprint and flexible SCL. The 15 μm-thick silicon solar cells conformally fit on a dome-shaped contact lens (ROC = 8 mm) without any mechanical and electrical degradation. This homojunction photovoltaic device containing an array of micro-holes exhibits a , , and maximum power density of 504 mV, 6.48 mA cm, and 1.67 mW cm, respectively, at 25% visible light transparency under an AM1.5 one sun condition. Furthermore, the measurements were conducted under low-intensity indoor light conditions and resulted in a maximum power output of 25 and 42 μW cm for the 50 and 25% transparent solar cells, respectively.
为可穿戴物联网设备，尤其是智能隐形眼镜（SCL）供电，是其广泛应用和商业化的主要障碍之一。在本研究中，我们通过单面微加工工艺成功设计、制造并表征了半透明、自支撑且柔性的单晶硅太阳能电池。光学、机械和电学模拟以及实际测量结果，验证了我们开发的太阳能电池可应用于尺寸有限且柔性的SCL。厚度为15μm的硅太阳能电池能与圆顶形隐形眼镜（曲率半径 = 8 mm）共形贴合，且不会出现任何机械和电学性能退化。这种包含微孔阵列的同质结光伏器件，在AM1.5标准太阳条件下、可见光透明度为25%时，开路电压、短路电流密度和最大功率密度分别为504 mV、6.48 mA/cm²和1.67 mW/cm²。此外，在低强度室内光条件下进行的测量结果表明，50%和25%透明度的太阳能电池最大功率输出分别为25和42 μW/cm²。
