Monodisperse Dual-Functional Upconversion Nanoparticles Enabled Near-Infrared Organolead Halide Perovskite Solar Cells

Ming He, Xinchang Pang, Xueqin Liu, Beibei Jiang, Yanjie He, Henry Snaith, Zhiqun Lin

Research output: Contribution to journalArticlepeer-review

279 Scopus citations

Abstract

Extending the spectral absorption of organolead halide perovskite solar cells from visible into near-infrared (NIR) range renders the minimization of non-absorption loss of solar photons with improved energy alignment. Herein, we report on, for the first time, a viable strategy of capitalizing on judiciously synthesized monodisperse NaYF4:Yb/Er upconversion nanoparticles (UCNPs) as the mesoporous electrode for CH3NH3PbI3 perovskite solar cells and more importantly confer perovskite solar cells to be operative under NIR light. Uniform NaYF4:Yb/Er UCNPs are first crafted by employing rationally designed double hydrophilic star-like poly(acrylic acid)-block-poly(ethylene oxide) (PAA-b-PEO) diblock copolymer as nanoreactor, imparting the solubility of UCNPs and the tunability of film porosity during the manufacturing process. The subsequent incorporation of NaYF4:Yb/Er UCNPs as the mesoporous electrode led to a high efficiency of 17.8 %, which was further increased to 18.1 % upon NIR irradiation. The in situ integration of upconversion materials as functional components of perovskite solar cells offers the expanded flexibility for engineering the device architecture and broadening the solar spectral use. A strategy for integrating NaYF4:Yb/Er upconversion nanoparticles as a mesoporous electrode into CH3NH3PbI3 perovskite solar cells makes it possible to operate the cells with near-infrared light. The in situ integration of upconversion materials as functional components in perovskite solar cells offers flexibility for engineering the device architecture and broadening the use of solar radiation.

Original languageEnglish
Pages (from-to)4280-4284
Number of pages5
JournalAngewandte Chemie - International Edition
Volume55
Issue number13
DOIs
StatePublished - 18 Mar 2016

Bibliographical note

Publisher Copyright:
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

  • near-infrared
  • photovoltaic devices
  • polymers
  • solar cells
  • upconversion nanoparticles

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