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Room-Temperature Processing of TiOx Electron Transporting Layer for Perovskite Solar Cells.
Xiaoyu Deng1, George C Wilkes2, Alexander Z Chen1
1Department of Chemical Engineering, University of Virginia , Charlottesville, Virginia 22904, United States.
The Journal of Physical Chemistry Letters
|June 29, 2017
Summary
Researchers developed a room-temperature, solution-processed titanium oxide (TiOx) layer for flexible perovskite solar cells. This advancement enables high-throughput manufacturing without compromising performance, achieving high power conversion efficiencies.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- High-throughput manufacturing of flexible perovskite solar cells requires low-temperature processing of all components.
- Conventional high-performance perovskite solar cells utilize titanium dioxide (TiO2) electron transporting layers, which necessitate high-temperature processing (>450 °C).
- This high-temperature requirement limits scalability and compatibility with flexible substrates.
Purpose of the Study:
- To demonstrate a room-temperature, solution-processed titanium oxide (TiOx) layer as an alternative electron transporting layer for perovskite solar cells.
- To evaluate the performance of perovskite solar cells incorporating the novel TiOx layer.
- To enable low-temperature, scalable manufacturing of flexible perovskite solar cells.
Main Methods:
- Solution processing of TiOx thin films at room temperature.
- Fabrication of perovskite solar cells using the room-temperature processed TiOx layer.
- Characterization using optical spectroscopy, electrical measurements, and X-ray diffraction (XRD).
- Performance evaluation including power conversion efficiency (PCE) measurements.
Main Results:
- The room-temperature processed TiOx layer exhibits performance comparable to high-temperature processed TiO2.
- A champion perovskite solar cell achieved a power conversion efficiency of 16.3%.
- The room-temperature TiOx layer was found to be amorphous and contained organic residues, yet maintained suitable optical and electrical properties.
- Flexible perovskite solar cells with the room-temperature TiOx layer demonstrated a PCE of 14.3%.
Conclusions:
- Room-temperature solution processing of TiOx is a viable alternative to high-temperature TiO2 for perovskite solar cells.
- This low-temperature approach facilitates high-throughput, roll-to-roll manufacturing of flexible perovskite solar cells.
- The developed TiOx layer enables efficient and scalable production of next-generation solar energy devices.
