Solar energy harvesting scheme using syringe-like ZnO nanorod arrays for InGaN/GaN multiple quantum well solar cells

G J Lin; K Y Lai; C A Lin; J H He

doi:10.1364/OL.37.000061

Solar energy harvesting scheme using syringe-like ZnO nanorod arrays for InGaN/GaN multiple quantum well solar cells

Opt Lett. 2012 Jan 1;37(1):61-3. doi: 10.1364/OL.37.000061.

Authors

G J Lin¹, K Y Lai, C A Lin, J H He

Affiliation

¹ Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, 10617, Taiwan.

PMID: 22212791
DOI: 10.1364/OL.37.000061

Abstract

Syringe-like ZnO nanorod arrays (NRAs) synthesized by a hydrothermal method were applied as the light-harvesting layer on InGaN-based multiple quantum well (MQW) solar cells. Theoretical calculations show that the NRAs with an abrupt shrinkage of tip diameter can further suppress surface reflectance in comparison with the flat NRAs. InGaN-based MQW solar cells with the syringe-like NRAs exhibit greatly improved conversion efficiencies by 36%. These results are attributed to the improved flatness of the refractive index profile at the air/device interface, which results in enhanced light trapping effect on the device surface.