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Anisotropy in a 2D Perovskite Ferroelectric Drives Self‐Powered Polarization‐Sensitive Photoresponse for Ultraviolet Solar‐Blind Polarized‐Light Detection.
- Source :
-
Angewandte Chemie . 6/27/2022, Vol. 134 Issue 26, p1-6. 6p. - Publication Year :
- 2022
-
Abstract
- Polarized‐light detection in the deep ultraviolet solar‐blind region is indispensable for optoelectronic applications. 2D hybrid perovskite ferroelectrics with inherent anisotropy and bulk photovoltaic effect (BPVE) have become a robust candidate in this portfolio. We here report a wide band‐gap 2D perovskite ferroelectric, (isobutylammonium)2(methylamium)Pb2Cl7 (1), in which the BPVE behaves as self‐driving source for solar‐blind ultraviolet polarized‐light detection. It exhibits a large dichroism ratio (≈15.7) and superior BPVE‐directed photocurrent (≈3.6 μA cm−2, under 266 nm). These attributes facilitate excellent self‐powered polarized‐light detection of high on/off contrast (≈103) and polarization ratio (≈2.5), beyond those of inorganic oxides (e.g. ZnO, 1.47; GaN, 1.38). This study highlights potential of 2D perovskite ferroelectrics for new optoelectronic application. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00448249
- Volume :
- 134
- Issue :
- 26
- Database :
- Academic Search Index
- Journal :
- Angewandte Chemie
- Publication Type :
- Academic Journal
- Accession number :
- 157549941
- Full Text :
- https://doi.org/10.1002/ange.202205030