Grain-Boundary "Patches" by In Situ Conversion to Enhance Perovskite Solar Cells Stability
- 18 July 2018
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 30 (29), e1800544
- https://doi.org/10.1002/adma.201800544
Abstract
The power conversion efficiency of organic-inorganic hybrid perovskite solar cells has increased rapidly, but the device stability remains a big challenge. Previous studies show the grain boundary (GB) can facilitate ion migration and initiate device degradation. Herein, methimazole (MMI) is employed for the first time to construct a surface patch by in situ converting residual PbI2 at GBs. The resultant MMI-PbI2 complex can effectively suppress ion migration and inhibit diffusion of the metal electrodes. The origin of the surface patch effect and their working mechanisms are investigated experimentally and theoretically at the microscopic level. It hence demonstrates a simple and effective method to prolong the device stability in the context of GB engineering, which could be extensively applied to perovskite-based optoelectronics.Keywords
Funding Information
- National Natural Science Foundation of China (51673025)
This publication has 49 references indexed in Scilit:
- Enhanced Photoluminescence and Solar Cell Performance via Lewis Base Passivation of Organic–Inorganic Lead Halide PerovskitesACS Nano, 2014
- Hysteresis and transient behavior in current–voltage measurements of hybrid-perovskite absorber solar cellsEnergy & Environmental Science, 2014
- The emergence of perovskite solar cellsNature Photonics, 2014
- Controllable Self-Induced Passivation of Hybrid Lead Iodide Perovskites toward High Performance Solar CellsNano Letters, 2014
- Anomalous Hysteresis in Perovskite Solar CellsThe Journal of Physical Chemistry Letters, 2014
- Planar Heterojunction Perovskite Solar Cells via Vapor-Assisted Solution ProcessJournal of the American Chemical Society, 2013
- Impedance Spectroscopic Analysis of Lead Iodide Perovskite-Sensitized Solid-State Solar CellsACS Nano, 2013
- Efficient planar heterojunction perovskite solar cells by vapour depositionNature, 2013
- Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic CellsJournal of the American Chemical Society, 2009
- Evidence for direct interactions between methimazole and free radicalsFEBS Letters, 1984