Slow Hot-Carrier Cooling in Halide Perovskites: Prospects for Hot-Carrier Solar Cells

Mingjie Li, Jianhui Fu, Qiang Xu, Tze Chien Sum

Research output: Journal article publicationReview articleAcademic researchpeer-review

47 Citations (Scopus)

Abstract

Rapid hot-carrier cooling is a major loss channel in solar cells. Thermodynamic calculations reveal a 66% solar conversion efficiency for single junction cells (under 1 sun illumination) if these hot carriers are harvested before cooling to the lattice temperature. A reduced hot-carrier cooling rate for efficient extraction is a key enabler to this disruptive technology. Recently, halide perovskites emerge as promising candidates with favorable hot-carrier properties: slow hot-carrier cooling lifetimes several orders of magnitude longer than conventional solar cell absorbers, long-range hot-carrier transport (up to ≈600 nm), and highly efficient hot-carrier extraction (up to ≈83%). This review presents the developmental milestones, distills the complex photophysical findings, and highlights the challenges and opportunities in this emerging field. A developmental toolbox for engineering the slow hot-carrier cooling properties in halide perovskites and prospects for perovskite hot-carrier solar cells are also discussed.

Original languageEnglish
Article number1802486
JournalAdvanced Materials
Volume31
Issue number47
DOIs
Publication statusPublished - 22 Nov 2019
Externally publishedYes

Keywords

  • halide perovskite
  • hot carriers
  • hot-carrier solar cell
  • phonon bottleneck
  • Shockley–Queisser limit

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this