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- Title
High-Performance Hole-Extraction Layer of Sol-Gel-Processed NiO Nanocrystals for Inverted Planar Perovskite Solar Cells.
- Authors
Zonglong Zhu; Yang Bai; Teng Zhang; Zhike Liu; Xia Long; Zhanhua Wei; Zilong Wang; Lixia Zhang; Jiannong Wang; Feng Yan; Shihe Yang
- Abstract
Hybrid organic/inorganic perovskite solar cells have been rapidly evolving with spectacular successes in both nanostructured and thin-film versions. Herein, we report the use of a simple sol-gel-processed NiO nanocrystal (NC) layer as the hole-transport layer in an inverted perovskite solar cell. The thin NiO NC film with a faceted and corrugated surface enabled the formation of a continuous and compact layer of well-crystallized CH3NH3PbI3 in a two-step solution process. The hole-extraction and -transport capabilities of this film interfaced with the CH3NH3PbI3 film were higher than those of organic PEDOT:PSS layers. The cell with a NiO NC film with a thickness of 30-40 nm exhibited the best performance, as a thinner layer led to a higher leakage current, whereas a thicker layer resulted in a higher series resistance. With the NiO film, we observed a cell efficiency of 9.11%, which is by far the highest reported for planar perovskite solar cells based on an inorganic hole-extracting layer.
- Subjects
PEROVSKITE synthesis; NICKEL oxide; SOLAR cells; SOL-gel processes; NANOCRYSTAL synthesis; INORGANIC organic polymers; ENERGY conversion
- Publication
Angewandte Chemie, 2014, Vol 126, Issue 46, p12779
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201405176