Details

Autor(en) / Beteiligte

• Zhu, Zonglong
• Bai, Yang
• Zhang, Teng
• Liu, Zhike
• Long, Xia
• Wei, Zhanhua
• Wang, Zilong
• Zhang, Lixia
• Wang, Jiannong
• Yan, Feng
• Yang, Shihe

Titel

High-Performance Hole-Extraction Layer of Sol-Gel-Processed NiO Nanocrystals for Inverted Planar Perovskite Solar Cells

Ist Teil von

• Angewandte Chemie (International ed.), 2014-11, Vol.53 (46), p.12571-12575

Auflage

International ed. in English

Ort / Verlag

Weinheim: WILEY-VCH Verlag

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. The advantages are crystal clear: A transparent layer of NiO nanocrystals fabricated by a simple sol–gel processing method acted as an efficient hole‐transport layer in an inverted perovskite solar cell. With the NiO film (see picture), a cell efficiency of 9.11 % was observed: by far the highest for a planar perovskite solar cell based on an inorganic hole‐extraction layer.