Defect Migration in Organic-inorganic Halide Perovskite Solar Cell: Critical Role of Grain Boundaries

Martin A. Green^a, Shujuan Huang^a, Anita Ho-Baillie^a, Jae S. Yun^a, Jan Seidel^b, WoonSeok Yang^c, Jun Hong Noh^c, Nam Joong Jeon^c, Young Chan Kim^c, Sang Il Seok

^aUniversity of New South Wales, Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Engineering, Sydney 2052, Sydney, Australia

^b2School of Materials Science and Engineering, University of New South Wales, Sydney 2052

^cKorea Research Institute of Chemical Technology (KRICT), 141 Gajeongro, Yuseong, Daejeon, 305, Korea, Republic of

^dSungkyunkwan University, South Korea, 300 Cheoncheon-dong, Jangan-gu, Suwon, 440, Korea, Republic of

Materials for Sustainable Development Conference (MATSUS)
Proceedings of nanoGe September Meeting 2015 (NFM15)

Santiago de Compostela, Spain, 2015 September 6th - 15th

Poster, Jae S. Yun, 239
Publication date: 8th June 2015

In this work we performed Kelvin probe force microscopy on top surface of (FAPbI3)1−x(MAPbBr3)xand MAPbI3perovskite solar cells. We observe polarity changes at the top surface of the sample by applying bias to the AFM tip. We suspect defect migration is responsible for this phenomena as time scale for the process takes up to fewminutes. Also, we findp-type defects migrate much faster compare to n-type defects. Defect migration also temporarily inflated grain boundaries and permenatly changed morphology of the sample surface. Most importantly, we find that grain boundaries serve as a shortcut for defect migration.Our finding suggests that properties of grain boundaries play critical roles in organic-inorganic halide perovskite solar cells.

nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.

MATSUS

Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.

International Conference on Hybrid and Organic Photovoltaics

International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.

Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics

The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.

International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics

The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.