Quantum Dot Luminescent Concentrator Cavity Exhibiting 30-fold Concentration

Noah D. Bronstein, Yuan Yao, Lu Xu, Erin O'Brien, Alexander S. Powers, Vivian E. Ferry, A. Paul Alivisatos, Ralph G. Nuzzo

Research output: Contribution to journalArticlepeer-review

82 Scopus citations

Abstract

Luminescent solar concentrators doped with CdSe/CdS quantum dots provide a potentially low-cost and high-performance alternative to costly high-band-gap III-V semiconductor materials to serve as a top junction in multijunction photovoltaic devices for efficient utilization of blue photons. In this study, a photonic mirror was coupled with such a luminescent waveguide to form an optical cavity where emitted luminescence was trapped omnidirectionally. By mitigating escape cone and scattering losses, 82% of luminesced photons travel the length of the waveguide, creating a concentration ratio of 30.3 for blue photons in a waveguide with a geometric gain of 61. Further, we study the photon transport inside the luminescent waveguide, showing unimpeded photon collection across the entire length of the waveguide.

Original languageEnglish (US)
Pages (from-to)1576-1583
Number of pages8
JournalACS Photonics
Volume2
Issue number11
DOIs
StatePublished - Aug 17 2015

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society.

Keywords

  • light trapping
  • luminescent solar concentrators
  • photovoltaics
  • quantum dots
  • transfer printing

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