Absolute electroluminescence imaging of multi-junction solar cells and calibration standards

Masahiro Yoshita, Lin Zhu, Changsu Kim, Hidefumi Akiyama, Shaoqiang Chen, Toshimitsu Mochizuki, Hidehiro Kubota, Tetsuya Nakamura, Mitsuru Imaizumi, Yoshihiko Kanemitsu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

14 Scopus citations

Abstract

We developed absolute electroluminescence (EL) calibration standards to evaluate absolute radiative-emission rates from subcells in multi-junction (MJ) solar cells. The absolute-EL-measurement system consists of an EL imaging setup and an emission-intensity-calibrated planar light-emitting diode with a circular open aperture as an emission-intensity standard. We applied this system to the measurements of the absolute EL imaging of a monolithic satellite-use InGaP/GaAs/Ge MJ solar cell. From the observed absolute EL images, we characterized external EL quantum efficiencies and internal open-circuit voltages of InGaP and GaAs subcells.

Original languageEnglish
Title of host publication2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479979448
DOIs
StatePublished - 14 Dec 2015
Event42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States
Duration: 14 Jun 201519 Jun 2015

Publication series

Name2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015

Conference

Conference42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
Country/TerritoryUnited States
CityNew Orleans
Period14/06/1519/06/15

Keywords

  • EL imaging
  • III-V semiconductor materials
  • absolute electroluminescence measurement
  • calibration standard
  • external luminescence quantum efficiency
  • multi-junction solar cells
  • sub-cell diagnosis

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