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- Title
Interfacial Modification Using Hydrogenated TiO<sub>2</sub> Electron-Selective Layers for High-Efficiency and Light-Soaking-Free Organic Solar Cells.
- Authors
Nam, Minwoo; Huh, Jin Young; Park, Yongkook; Hong, Yong Cheol; Ko, Doo‐Hyun
- Abstract
Optimizing the interfacial contacts between the photoactive layer and the electrodes is an important factor in determining the performance of organic solar cells (OSCs). A charge-selective layer with tailored electrical properties enhances the charge collection efficiency and interfacial stability. Here, the potential of hydrogenated TiO2 nanoparticles (H-TiO2 NPs) as an efficient electron-selective layer (ESL) material in OSCs is reported for the first time. The H-TiO2 is synthesized by discharge plasma in liquid at atmospheric pressure, which has the benefits of a simple one-pot synthesis process, rapid and mild reaction conditions, and the capacity for mass production. The H-TiO2 exhibits high conductivity and favorable energy level formation for efficient electron extraction, providing a basis for an efficient bilayer ESL system composed of conjugated polyelectrolyte/H-TiO2. Thus, the enhanced charge transport and extraction efficiency with reduced recombination losses at the cathode interfacial contacts is achieved. Moreover, the OSCs composed of H-TiO2 are almost free of light soaking, which has been reported to severely limit the performance and stability of OSCs based on conventional TiO2 ESLs. Therefore, H-TiO2 as a new efficient, stable, and cost-effective ESL material has the potential to open new opportunities for optoelectronic devices.
- Subjects
TITANIUM oxides; ELECTRONS; SOLAR cells; PHOTOACTIVATION; NANOPARTICLES
- Publication
Advanced Energy Materials, 2018, Vol 8, Issue 14, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.201703064