Strong Induced Circular Dichroism in a Hybrid Lead‐Halide Semiconductor Using Chiral Amino Acids for Crystallite Surface Functionalization
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- Walter Schottky Institut and Department of Physics Technical University of Munich Am Coulombwall 4 85748 Garching Germany
- Lawrence Berkeley National Laboratory 1 Cyclotron Rd. Berkeley CA 94720 USA
- Catalysis Research Center and Chemistry Department Technical University of Munich Lichtenbergstraße 4 85748 Garching Germany
- Physik‐Department Technische Universität München James‐Franck‐Straße 1 85748 Garching Germany
- Physik‐Department Technische Universität München James‐Franck‐Straße 1 85748 Garching Germany, Deutsches Elektronen‐Synchrotron (DESY) Notkestr. 85 22607 Hamburg Germany
- Materials Sciences Division Lawrence Berkeley National Laboratory 1 Cyclotron Rd. Berkeley CA 94720 USA
- Deutsches Elektronen‐Synchrotron (DESY) Notkestr. 85 22607 Hamburg Germany, KTH Royal Institute of Technology Teknikringen 56–58 Stockholm 10044 Sweden
- Physik‐Department Technische Universität München James‐Franck‐Straße 1 85748 Garching Germany, Technische Universität München Lichtenbergstr. 1 85748 Garching Germany
Abstract Chirality is a desired property in functional semiconductors for optoelectronic, catalytic, and spintronic applications. Here, introducing enantiomerically‐pure 3‐aminobutyric acid (3‐ABA) into thin films of the 1D semiconductor dimethylammonium lead iodide (DMAPbI 3 ) is found to result in strong circular dichroism (CD) in the optical absorption. X‐ray diffraction and grazing incidence small angle X‐ray scattering (GISAXS) are applied to gain molecular‐scale insights into the chirality transfer mechanism, which is attributed to a chiral surface modification of DMAPbI 3 crystallites. This study demonstrates that the CD signal strength can be controlled by the amino‐acid content relative to the crystallite surface area. The CD intensity is tuned by the composition of the precursor solution and the spin‐coating time, thereby achieving anisotropy factors ( g abs ) as high as 1.75 × 10 –2 . Grazing incidence wide angle scattering reveals strong preferential ordering that can be suppressed via tailored synthesis conditions. Different contributions to the chiroptical properties are resolved by a detailed analysis of the CD signal utilizing an approach based on the Mueller matrix model. This report of a novel class of chiral hybrid semiconductors with precise control over their optical activity presents a promising approach for the design of circularly polarized light detectors and emitters.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1873033
- Alternate ID(s):
- OSTI ID: 1876527; OSTI ID: 1876838
- Journal Information:
- Advanced Optical Materials, Journal Name: Advanced Optical Materials Vol. 10 Journal Issue: 14; ISSN 2195-1071
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
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