Fabrication and Photovoltaic Effect of CdS/Silicon Nanopillars Heterojunction Solar Cell

Abstract

A 200 nm thickness layer of Cadmium sulfide (CdS) film covers on the silicon nanopillars surface to heterojunction solar cell. The nanopillars with the large surface ratio can increase the heterojunction surface and the light absorption, which can improve the photovoltaic performance of solar cell. Silicon nanopillars are fabricated by Cesium Chloride self‐assembly lithography and inductively coupled plasma dry etching as substrate. CdS film covers the silicon nanopillars surface by the RF magnetron sputtering using CdS ceramic target. The X‐ray diffraction patterns of the nanopillar and planar substrates after CdS film covering indicate that all the deposited films are crystal. The nanopillars wafer has lower reflectance than the planar one both before and after the CdS film covering for the wavelength ranging from 350 to 1050 nm. With this method, the nanopillar based CdS/Silicon heterojunction solar cell has the better photovoltaic performance than the planar one. The Jsc increases from 7.12 to 13.92 mA/cm2 and the energy conversion efficiency increases from 1.32 % to 1.83 %. The large surface ratio nanopillars might be a potential substrate for high efficiency heterojunction solar cell.

A Fully Printable Hole‐Transporter‐Free Semi‐Transparent Perovskite Solar Cell

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GaAs Nanowires Grown by Catalyst Epitaxy for High Performance Photovoltaics

“…However, many challenges remain to be solved before polymer and perovskite solar cells can be considered for real-life applications, including incorporating novel light harvesting materials, optimizing device architectures, developing conductive materials for the transparent electrodes, and especially improving the long-term stability of PVs. The other emerged strategy of circumventing assumptions of the Shockley-Queisser is PV designs utilizing nanostructured materials, such as nanocrystals (based on multiple exciton generation (MEG) with limiting efficiency of~44%) [39][40][41][42], nanotubes [43][44][45], nanopillars [46][47][48], and NWs [49][50][51][52][53][54][55][56][57][58]. With the advantages of significant reduction in material usage, strong light absorption and efficient charge separation, nanostructured solar cells hold great promise for reaching the demand of 0.03-0.05 $/kWh by third-generation technologies.…”

Fabrication and Photosensitivity of CdS/Silicon Nanoscrew Photoresistor

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