High Efficiency Hybrid Solar Cells Using Nanocrystalline Si Quantum Dots and Si Nanowires

Mrinal Dutta; Lavanya Thirugnanam; Pham Van Trinh; Naoki Fukata

doi:10.1021/acsnano.5b03268

High Efficiency Hybrid Solar Cells Using Nanocrystalline Si Quantum Dots and Si Nanowires

ACS Nano. 2015 Jul 28;9(7):6891-9. doi: 10.1021/acsnano.5b03268. Epub 2015 Jul 17.

Authors

Mrinal Dutta¹, Lavanya Thirugnanam¹, Pham Van Trinh¹, Naoki Fukata¹

Affiliation

¹ International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.

PMID: 26167772
DOI: 10.1021/acsnano.5b03268

Abstract

We report on an efficient hybrid Si nanocrystal quantum dot modified radial p-n junction thinner Si solar cell that utilizes the advantages of effective exciton collection by energy transfer from nanocrystal-Si (nc-Si) quantum dots to underlying radial p-n junction Si nanowire arrays with excellent carrier separation and propagation via the built-in electric fields of radial p-n junctions. Minimization of recombination, optical, and spectrum losses in this hybrid structure led to a high cell efficiency of 12.9%.

Keywords: Si; p−n junctions; quantum dot; solar cell.

Publication types

Research Support, Non-U.S. Gov't