Optimization of triple-junction hydrogenated silicon solar cell nc-si:H/a-si:H/a-sige:H using step graded Si1-xGex layer

Nji Raden Poespawati, Rizqy Pratama Rahman, Junivan Sulistianto, Retno Wigajatri Purnamaningsih, Tomy Abuzairi

Research output: Contribution to journalArticlepeer-review

Abstract

This paper shows the attempt to increase the performance of triple-junction hydrogenated silicon solar cells with structure nc-Si:H/a-Si:H/a-SiGe:H. The wxAMPS software was used to simulate and optimize the design. In an attempt to increase the performance, an a-SiC:H layer on the p-layer was replaced with an a-Si:H layer and an a-SiGe layer was replaced with a step graded Si1-xGex layer. Then, to achieve the best performing device, we optimized the concentration of germanium and thickness of the step graded Si1-xGex layer. The result shows that the optimum concentration of germanium in the p-i upper layer and i-n lower layer are 0.86 and 0.90, respectively and the optimum thicknesses are 10 nm and 230 nm, respectively. The optimized device performed with an efficiency of 19.08%, adding 3 more percent of efficiency from the original design. Moreover, there is a significant possibility of increasing the efficiency of a triple-junction solar cell by modifying it into a step graded Si1-xGex layer.

Original languageEnglish
Pages (from-to)699-706
Number of pages8
JournalBulletin of Electrical Engineering and Informatics
Volume10
Issue number2
DOIs
Publication statusPublished - 2021

Keywords

  • Hydrogenated silicon
  • SiGe
  • Solar cell
  • Step graded
  • Triple-junction

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