[7p-S21-1~22] 13.10 Compound solar cells

[7p-S21-12] Investigation of anti-reflection coatings for broadband solar cells

〇(M1)Hideo Teramoto¹, Ryota Jomen¹, Yuki Nakamura¹, Yoshiaki Ajima¹, Pan Dai², Shulong Lu², Koichi Akahane³, Shiro Uchida¹ (1.Chiba Inst., 2.Suzhou Inst., 3.NICT)

Keywords:anti reflection coating, multi-junction solar cell, solar weighted reflectance

Triple layer anti-reflection coatings were investigated to improve efficiencies of broad band multi-junction solar cells. SiO₂/SiN/TiO₂ triple layers successively sputtered on the surface of silicon suggested a decrease in the solar weighted reflectance of 3.0% compared with conventional double layer anti-reflection coatings. By introducing this reflectivity in the simulated calculation of InGaAs single solar cell performance, we confirmed that short circuit current density and conversion efficiency were improved by 1.0 mAcm^-2 and 0.4%, respectively.