Photoenergy harvesting with 3D solar cell (3DSC) for damage sensors: A nanotechnology approach

Abstract

Solid state 3DSCs have been developed using thermally-stable and highly conductive a) titanium micro-wires (TM) and b) carbon nanotubes yarns (CNYs). These studies result in two different types of cells: a) TM-CNY and CNY-CNY systems. Two types of working electrodes (WEs) have been developed using TM and CNY separately. Highly inter-aligned, ultrastrong and flexible CNYs with excellent electrical conductivity, mechanical integrity and catalytic property have been successfully used as counter electrodes (CEs). The open circuit voltage and current density of the cells can remarkably be improved through optimizing the numbers of CNYs and engineering of CNYs-TiO2 interface. Optimizing the number of CNYs in the electrodes yields a photoconversion efficiency of 0.1959 % (TM-CNY 3DSC) and ∼ 1.5 % (CNY-CNY 3DSC) with prolonged-time stability. The cells are able to transport photocurrent over a significant distance using a simple cell configuration with a wide range of structural flexibility.

Publication Title

International SAMPE Technical Conference

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