articleThe Journal of Physical Chemistry LettersMar 24, 2014HYBRID OA

High Photoluminescence Efficiency and Optically Pumped Lasing in Solution-Processed Mixed Halide Perovskite Semiconductors

FDFelix DeschlerMBMichael B. PriceSPSandeep PathakLELina E. KlintbergDJDavid-Dominik Jarausch

Cavendish Hospital · University of Oxford

PubMed
Indexed incrossrefpubmed

Abstract

The study of the photophysical properties of organic-metallic lead halide perovskites, which demonstrate excellent photovoltaic performance in devices with electron- and hole-accepting layers, helps to understand their charge photogeneration and recombination mechanism and unravels their potential for other optoelectronic applications. We report surprisingly high photoluminescence (PL) quantum efficiencies, up to 70%, in these solution-processed crystalline films. We find that photoexcitation in the pristine CH3NH3PbI3-xClx perovskite results in free charge carrier formation within 1 ps and that these free charge carriers undergo bimolecular recombination on time scales of 10s to 100s of ns. To exemplify the…

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Topics & keywords

Topics
Keywords
  • Lasing threshold
  • Halide
  • Photoluminescence
  • Perovskite (structure)
  • Materials science
  • Semiconductor
  • Optoelectronics
  • Optics
UN Sustainable Development Goals
  • Affordable and clean energy
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