DOI QR코드

DOI QR Code

측면입사광에 대한 SiOx 무반사 회절격자 결합 c-Si PV 서브-모듈의 광전변환효율 향상

Improvement of Solar Conversion Efficiency in a c-Si PV Sub-Module Integrated with SiOx Anti-Reflection Grating for Oblique Optical Irradiation

  • 심지현 (청주대학교 에너지융합학과) ;
  • 김제하 (청주대학교 에너지융합학과)
  • Shim, Ji-Hyun (Department of Energy Convergence Engineering, Cheongju University) ;
  • Kim, Jeha (Department of Energy Convergence Engineering, Cheongju University)
  • 투고 : 2017.02.10
  • 심사 : 2017.03.20
  • 발행 : 2017.05.01

초록

We fabricated 1-D and 2-D diffraction gratings of SiOx anti-reflection (AR) film grown on a quartz substrate and integrated them into a c-Si photovoltaic (PV) submodule. The light-trapping effect of the resulting submodules was studied in terms of the oblique optical incident angle, ${\theta}_i$. As the ${\theta}_i$ increased, solar conversion efficiency, ${\eta}$, was improved as expected by the increased optical transmission caused by the grating. For ${\theta}_i{\leq}30^{\circ}$, the relative solar conversion efficiency, ${\Delta}{\eta}$, of a 1-D SiOx (t=300 nm) grating, compared to that of a flat SiOx AR-coated integrated PV submodule, was improved very little, with a small variation of within 2%, but increased markedly for ${\theta}_i{\geq}40^{\circ}$. We observed a change of ${\Delta}{\eta}$ as large as 10.7% and 9.5% for the SiOx grating of period t=800 nm and 1200 nm, respectively. For a 2-D SiOx (t=300 nm) grating integrated PV submodule, however, the optical trapping behavior was similar in terms of ${\theta}_i$ but its variation was small, within ${\pm}1.0%$.

키워드

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