Add to BibSonomy
Abstract
Quantum dot solar cells (QDSCs) are regarded as one of the most efficient devices due to their intermediate band structures. A suitable light-trapping (LT) strategy matching the absorption spectrum is important to improve the photocurrent conversion efficiency of QDSCs. In this paper, we have proposed a design of the periodically patterned top and bottom dielectric nanopyramid arrays for highly efficient light trapping in GaAs-based QDSCs. The dielectric nanopyramid arrays significantly improve the light absorption of QDSCs in the longer wavelength between 0.8 µm and 1.2 µm. In addition, this LT structure ensures a completely flat window layer and back surface field layer while passivating these semiconductor surfaces. For the optimized double-sided structure, the short-circuit current generated by QDSC is ${34.32}\;{{\rm mA/cm}^2}$, where the photocurrent from the quantum dots (QDs) is ${5.17}\;{{\rm mA/cm}^2}$. Compared to the photocurrent of the QDSC without an LT structure, the photocurrent of the double-sided structure is increased by 84%. The QD photocurrent of the double-sided structure is increased by 570% compared to that of the QDSC without the LT structure.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Sabina Hatch, Jiang Wu, Kimberly Sablon, Phu Lam, Mingchu Tang, Qi Jiang, and Huiyun Liu
Opt. Express 22(S3) A679-A685 (2014)
Timo Aho, Farid Elsehrawy, Antti Tukiainen, Sanna Ranta, Marianna Raappana, Riku Isoaho, Arto Aho, Arttu Hietalahti, Federica Cappelluti, and Mircea Guina
Appl. Opt. 59(21) 6304-6308 (2020)
Sina Foroutan and Hamed Baghban
Appl. Opt. 55(13) 3405-3412 (2016)