Quantum dot superlattice structure for high efficiency solar cells utilizing a bio-template and damage-free neutral beam etching

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Silicon (Si) quantum dot (QD) superlattice structures are promising candidates for all-Silicon tandem solar cells. An original top-down process involving a bio-template etching mask and damage-free neutral beam etching has been developed in order to fabricate a sub-10-nm highly ordered and dense two-dimensional (2D) array (one layer) of Si nanodisks (Si-ND) with a silicon carbide (SiC) interlayer. The Si-ND 2D array with SiC interlayer had an extremely high optical absorption coefficient and high carrier transport due to the formation of a wide miniband. As a result, high efficiency solar cells with an open-circuit voltage of 0.556 V, short-circuit current of 31.3 mA/cm 2, fill factor of 72%, and conversion efficiency of 12.6% were fabricated for the first time.

Original languageEnglish
Title of host publicationICSICT 2012 - 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, Proceedings
DOIs
Publication statusPublished - 2012
Event2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2012 - Xi'an, China
Duration: 2012 Oct 292012 Nov 1

Publication series

NameICSICT 2012 - 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, Proceedings

Other

Other2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2012
CountryChina
CityXi'an
Period12/10/2912/11/1

ASJC Scopus subject areas

  • Human-Computer Interaction
  • Electrical and Electronic Engineering

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