Effect of miniband formation in a quantum dot super lattice fabricated by combination of bio-template and neutral beam etching for high efficiency quantum dot solar cells

Mohammad Maksudur Rahman, Makoto Igarashi, Weiguo Hu, Mohd Erman Syazwan, Takeru Okada, Yusuke Hoshi, Noritaka Usami, Seiji Samukawa

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

Abstract

We studied the fabrication of a true silicon three-dimensional quantum dot super lattice (3D QDSL) by combination of bio-template and neutral beam etching, characterized it with respect to its photovoltaic performance, and realized its quantum effect. The existence of Si QDs was confirmed by using a bright field scanning transmission electron micrograph, and then a theoretical study proved the miniband formation inside our 3D QDSL. A drastic improvement in the photocurrent and efficiency of the p-i-n solar cell with QDSL showed a large electron transport and low series resistance by the vertical miniband formation inside the super lattice structure. Wide range of optical transition by QDs array in the QDSL was also observed in the external quantum efficiency of the QD solar cell.

Original languageEnglish
Title of host publication2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1092-1095
Number of pages4
ISBN (Electronic)9781479943982
DOIs
Publication statusPublished - 2014 Oct 15
Event40th IEEE Photovoltaic Specialist Conference, PVSC 2014 - Denver, United States
Duration: 2014 Jun 82014 Jun 13

Publication series

Name2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014

Other

Other40th IEEE Photovoltaic Specialist Conference, PVSC 2014
CountryUnited States
CityDenver
Period14/6/814/6/13

Keywords

  • mini band
  • quantum dot
  • silicon
  • super lattice

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Fingerprint Dive into the research topics of 'Effect of miniband formation in a quantum dot super lattice fabricated by combination of bio-template and neutral beam etching for high efficiency quantum dot solar cells'. Together they form a unique fingerprint.

Cite this