Hysteresis-free low-temperature-processed planar perovskite solar cells with 19.1% efficiency
Top Cited Papers
- 27 May 2016
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Energy & Environmental Science
- Vol. 9 (7), 2262-2266
- https://doi.org/10.1039/c6ee01037g
Abstract
Hysteresis-free, highly efficient and stable perovskite solar cells processed at low temperatures are strongly demanded to realize flexible or perovskite-based tandem solar cells. Here, we report a hysteresis-free planar CH3NH3PbI3 perovskite solar cell with a power conversion efficiency of 19.1% using a room-temperature vacuum-processed C60 electron transport layer (ETL) without the hole blocking layer. By optimizing the thickness of the C60 layer, the highly homogeneous, uniform, and dense ETL with a thickness of 35 nm is found to not only passivate the grain boundaries and surfaces of the perovskite layer, but also enhance charge transport properties. Thus, the C60 layer deposited on perovskites eliminates the photocurrent hysteresis and improves the cell efficiency. Also, compared to the device adopting the C60 and bathocuproine (BCP) combination, the one with the C60 layer without the BCP layer shows better performance due to enhanced electron extraction properties. Furthermore, for the first time, we have demonstrated a hysteresis-free flexible perovskite solar cell using the C60 ETL on a polyethylene naphthalate (PEN) substrate with 16.0% efficiency.Keywords
Funding Information
- Ministry of Education, Science and Technology (2011-0031561)
This publication has 37 references indexed in Scilit:
- Transparent Conductive Oxide‐Free Graphene‐Based Perovskite Solar Cells with over 17% EfficiencyAdvanced Energy Materials, 2015
- Perovskite photovoltaics: life-cycle assessment of energy and environmental impactsEnergy & Environmental Science, 2015
- Electron-hole diffusion lengths > 175 μm in solution-grown CH 3 NH 3 PbI 3 single crystalsScience, 2015
- Low trap-state density and long carrier diffusion in organolead trihalide perovskite single crystalsScience, 2015
- Perovskite Solar Cells: From Materials to DevicesSmall, 2014
- Electron-Hole Diffusion Lengths Exceeding 1 Micrometer in an Organometal Trihalide Perovskite AbsorberScience, 2013
- Long-Range Balanced Electron- and Hole-Transport Lengths in Organic-Inorganic CH 3 NH 3 PbI 3Science, 2013
- Sequential deposition as a route to high-performance perovskite-sensitized solar cellsNature, 2013
- Efficient Hybrid Solar Cells Based on Meso-Superstructured Organometal Halide PerovskitesScience, 2012
- Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic CellsJournal of the American Chemical Society, 2009