Bulletin of the American Physical Society
2018 Annual Meeting of the APS Mid-Atlantic Section
Volume 63, Number 20
Friday–Sunday, November 9–11, 2018; College Park, Maryland
Session B01: Poster Session (Day 1)
8:00 PM,
Friday, November 9, 2018
Edward St. John
Room: Lounge
Chair: Wendell T. Hill, III, University of Maryland, College Park
Abstract ID: BAPS.2018.MAS.B01.46
Abstract: B01.00046 : Metal Halide Perovskite Dynamics Driven by Water and Light*
Presenter:
John M. Howard
(Department of Materials Science and Engineering, University of Maryland)
Authors:
John M. Howard
(Department of Materials Science and Engineering, University of Maryland)
Marina S. Leite
(Department of Materials Science and Engineering, University of Maryland)
Hybrid organic-inorganic perovskites present ideal properties for light-emitting diodes and photovoltaics, but are limited by their stability under multiple operating conditions [1]. We first elucidate the impact of relative humidity (rH) cycling on the luminescence properties of four CsxFA1-xPb(IyBr1-y) perovskites using environmentally-controlled in situ micro-photoluminscence (PL) and discover PL hysteresis for all compositions but the 17%-Cs/38%-Br [2]. Next, we shift focus to light, and quantify the wavelength-dependent voltage dynamics in three perovskite compositions: (i) CH3NH3PbBr3, (ii) (MA,FA,Cs)Pb(I,Br)3, and (iii) CH3NH3PbI3 across a dark-light-dark illumination cycle using heterodyne Kelvin Probe voltage measurements [3]. We conclude with a discussion of the potential for machine learning to identify and control the impact of all environmental parameters [1].
[1] J. M. Howard, et al., Joule, Accepted (2018) - Invited Perspective.
[2] J. M. Howard, et al., Journal of Physical Chemistry Letters, 9, 3463 (2018).
[3] E. M. Tennyson*, J. M. Howard*, et al., to be submitted (2018).
*The authors thank the financial support from: NSF (ECCS, award 16-10833), APS Ovshinsky Sustainable Energy Fellowship, and the 2018-2019 UMD Harry K. Wells Graduate Fellowship
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAS.B01.46
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