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5 March 2019 Second harmonic generation in CH3NH3PbI3 thin films (Conference Presentation)
Irina V. Soboleva, Anna A. Popkova, Vladimir O. Bessonov, Mehedhi Hasan, Dmitry Lyashenko, Alex Zakhidov, Andrey A. Fedyanin
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Proceedings Volume 10915, Organic Photonic Materials and Devices XXI; 109150P (2019) https://doi.org/10.1117/12.2510656
Event: SPIE OPTO, 2019, San Francisco, California, United States
Abstract
Methylammonium lead iodide (CH3NH3PbI3 or MAPI) is an organohalide lead perovskite, a promising material for optoelectronic application, e.g. in solar cells and photodetectors. It has a number of advantages over more traditional photovoltaics materials such as CIGS, GaAs, and even silicon due to facile solution processing, direct bandgap, high optical absorption, sufficiently high, balanced carrier mobilities, shallow trap defects and low-cost synthesis. At present moment there are number of article which reported measurement of second-harmonic generation in MAPI single crystals and presented contradictory results demonstrating the presence or absence of second-harmonic signal from MAPI. In this work, the second-harmonic generation (SHG) is observed in MAPI thin film that can be used as a base of high efficient solar sell. The SHG intensity from MAPI is measured to be at least three orders of magnitude more than one from substrate and encapsulation glasses. The MAPI nonlinear second-order susceptibility is estimated as compared to reference sample of y-cut quartz. In case of bulk contribution, the MAPI second-order susceptibility of 10-15 m/V is achieved. The polarization of SHG signal is experimentally studied in MAPI samples. The fraction of linearly polarized SHG signal is different for p- and s-polarization of fundamental wave and increases in case of p-polarized pump. The large non-polarized background of SHG signal is partly corresponded to SHG hyper-Rayleigh scattering. The hyper-Rayleigh scattering angle is experimentally estimated using the diaphragm behind the collimating objective lens and found to be less then 11 degrees.
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Irina V. Soboleva, Anna A. Popkova, Vladimir O. Bessonov, Mehedhi Hasan, Dmitry Lyashenko, Alex Zakhidov, and Andrey A. Fedyanin "Second harmonic generation in CH3NH3PbI3 thin films (Conference Presentation)", Proc. SPIE 10915, Organic Photonic Materials and Devices XXI, 109150P (5 March 2019); https://doi.org/10.1117/12.2510656
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KEYWORDS
Second-harmonic generation
Thin films
Harmonic generation
Hyper Rayleigh scattering
Lead
Optoelectronics
Perovskite
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