articleNature CommunicationsOct 30, 2017GOLD OA

Hot carrier cooling mechanisms in halide perovskites

JFJianhui FuQXQiang XuGHGuifang HanBWBo WuCHCheng Hon Alfred Huan

Nanyang Technological University · Institute of Materials Research and Engineering

PubMed
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Abstract

Abstract Halide perovskites exhibit unique slow hot-carrier cooling properties capable of unlocking disruptive perovskite photon–electron conversion technologies (e.g., high-efficiency hot-carrier photovoltaics, photo-catalysis, and photodetectors). Presently, the origins and mechanisms of this retardation remain highly contentious (e.g., large polarons, hot-phonon bottleneck, acoustical–optical phonon upconversion etc.). Here, we investigate the fluence-dependent hot-carrier dynamics in methylammonium lead triiodide using transient absorption spectroscopy, and correlate with theoretical modeling and first-principles calculations. At moderate carrier concentrations (around 10 18 cm −3 ), carrier cooling is…

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Topics & keywords

Topics
Keywords
  • Phonon
  • Auger effect
  • Materials science
  • Perovskite (structure)
  • Optoelectronics
  • Condensed matter physics
  • Chemical physics
  • Auger
UN Sustainable Development Goals
  • Affordable and clean energy
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