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A Photoferroelectric Perovskite-Type Organometallic Halide with Exceptional Anisotropy of Bulk Photovoltaic Effects
- Source :
- Angewandte Chemie (International ed. in English). 55(22)
- Publication Year :
- 2016
-
Abstract
- Perovskite-type ferroelectrics composed of organometallic halides are emerging as a promising alternative to conventional photovoltaic devices because of their unique photovoltaic effects (PVEs). A new layered perovskite-type photoferroelectric, bis(cyclohexylaminium) tetrabromo lead (1), is presented. The material exhibits an exceptional anisotropy of bulk PVEs. Upon photoexcitation, superior photovoltaic behaviors are created along its inorganic layers, which are composed of corner-sharing PbBr6 octahedra. Semiconducting activity with remarkable photoconductivity is achieved in the vertical direction, showing sizeable on/off current ratios (>10(4) ), which compete with the most active photovoltaic material CH3 NH3 PbI3 . In 1 the temperature-dependence of photovoltage coincides fairly well with that of polarization, confirming the dominant role of ferroelectricity in such highly anisotropic PVEs. This finding sheds light on bulk PVEs in ferroelectric materials, and promotes their application in optoelectronic devices.
- Subjects :
- Chemistry
business.industry
Photoconductivity
Inorganic chemistry
Halide
General Medicine
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Ferroelectricity
Catalysis
0104 chemical sciences
Photoexcitation
Octahedron
Optoelectronics
0210 nano-technology
Polarization (electrochemistry)
business
Anisotropy
Perovskite (structure)
Subjects
Details
- ISSN :
- 15213773
- Volume :
- 55
- Issue :
- 22
- Database :
- OpenAIRE
- Journal :
- Angewandte Chemie (International ed. in English)
- Accession number :
- edsair.doi.dedup.....3831269a3bded5dac459d17e62ff76ba