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Monodisperse Dual‐Functional Upconversion Nanoparticles Enabled Near‐Infrared Organolead Halide Perovskite Solar Cells
Author(s) -
He Ming,
Pang Xinchang,
Liu Xueqin,
Jiang Beibei,
He Yanjie,
Snaith Henry,
Lin Zhiqun
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201600702
Subject(s) - materials science , mesoporous material , photon upconversion , perovskite (structure) , dispersity , halide , absorption (acoustics) , nanoparticle , polyacrylic acid , chemical engineering , optoelectronics , nanotechnology , chemistry , luminescence , inorganic chemistry , polymer , polymer chemistry , organic chemistry , catalysis , engineering , composite material
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 NaYF 4 :Yb/Er upconversion nanoparticles (UCNPs) as the mesoporous electrode for CH 3 NH 3 PbI 3 perovskite solar cells and more importantly confer perovskite solar cells to be operative under NIR light. Uniform NaYF 4 :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 NaYF 4 :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.