Perovskite-Fullerene Hybrid Materials Eliminate Hysteresis In Planar Diodes

Xu, Jixian; Buin, Andrei; Ip, Alexander H.; Li, Wei; Voznyy, Oleksandr; Comin, Riccardo; Yuan, Mingjian; Jeon, Seokmin; Ning, Zhijun; McDowell, Jeffrey; Kanjanaboos, Pongsakorn; Sun, Jon-Paul; Lan, Xinzheng; Quan, Li Na; Kim, Dong Ha; Hill, Ian; Maksymovych, Petro; Sargent, Edward H.

doi:10.1038/ncomms8081

Title: Perovskite-Fullerene Hybrid Materials Eliminate Hysteresis In Planar Diodes

Journal Article · Tue Mar 31 00:00:00 EDT 2015 · Nature Communications

DOI:https://doi.org/10.1038/ncomms8081· OSTI ID:1185807

Xu, Jixian ^[1]; Buin, Andrei ^[1]; Ip, Alexander H. ^[1]; Li, Wei ^[1]; Voznyy, Oleksandr ^[1]; Comin, Riccardo ^[1]; Yuan, Mingjian ^[1]; Jeon, Seokmin ^[2]; Ning, Zhijun ^[1]; McDowell, Jeffrey ^[1]; Kanjanaboos, Pongsakorn ^[1]; Sun, Jon-Paul ^[3]; Lan, Xinzheng ^[1]; Quan, Li Na ^[4]; Kim, Dong Ha ^[4]; Hill, Ian ^[3]; Maksymovych, Petro ^[2]; Sargent, Edward H. ^[1]

Univ. of Toronto, ON (Canada)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Dalhousie Univ., Halifax, NS (Canada)
Ewha Womans Univ., Seoul (Korea, Republic of)

Solution-processed planar perovskite devices are highly desirable in a wide variety of optoelectronic applications; however, they are prone to hysteresis and current instabilities. Here we report the first perovskite–PCBM hybrid solid with significantly reduced hysteresis and recombination loss achieved in a single step. This new material displays an efficient electrically coupled microstructure: PCBM is homogeneously distributed throughout the film at perovskite grain boundaries. The PCBM passivates the key PbI3 antisite defects during the perovskite self-assembly, as revealed by theory and experiment. Photoluminescence transient spectroscopy proves that the PCBM phase promotes electron extraction. We showcase this mixed material in planar solar cells that feature low hysteresis and enhanced photovoltage. Using conductive AFM studies, we reveal the memristive properties of perovskite films. We close by positing that PCBM, by tying up both halide-rich antisites and unincorporated halides, reduces electric field-induced anion migration that may give rise to hysteresis and unstable diode behaviour.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1185807

Journal Information:: Nature Communications, Vol. 6; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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