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Visible light absorbing ferroelectric materials for photovoltaics
Technology Overview: The invention covers the bandgap engineering strategy wherein two different transition-metal cations located on the perovskite B-site create ferroelectric perovskites with low bandgaps, with one cation driving ferroelectricity and the other giving a bandgap in the visible range. The solid solutions were synthesized by standard...
Published: 10/16/2023   |   Inventor(s): Andrew Rappe
Keywords(s):  
Category(s): Technology Classifications > Materials
HIGH-EFFICIENCY BULK PHOTOVOLTAIC EFFECT DEVICES
PAGE TITLE Overview PAGE SUMMARY The present invention is directed to photovoltaic devices and methods of generating electrical energy and power therefrom, based on a novel nano-enhanced bulk photovoltaic effect using non-centrosymmetric crystals, including ferroelectric and piezoelectric materials. In certain embodiments, the device comprises...
Published: 2/20/2025   |   Inventor(s): Jonathan Spanier, Vladimir Fridkin, Alessia Polemi, Andrew Rappe
Keywords(s):  
Category(s): Energy, Clean Tech & Sustainability, Advanced Materials & Chemicals
Method of Making Ferroelectric Material Thin Films
PAGE TITLE Overview PAGE SUMMARY A method of growing a FE material thin film using physical vapor deposition by pulsed laser deposition or RF sputtering is disclosed. The method involves creating a target to be used for the pulsed laser deposition in order to create a KBNNO thin film. The resultant KBNNO thin film is able to be used in photovoltaic...
Published: 2/20/2025   |   Inventor(s): Jonathan Spanier, Andrei (andrew) Akbasheu, Andrew Rappe, Liyan Wu, Peter Davies, Ilya Grinberg
Keywords(s):  
Category(s): Electrical Engineering, Advanced Materials & Chemicals
Semiconductor ferroelectric compositions and their use in photovoltaic devices
PAGE TITLE Overview PAGE SUMMARY Disclosed herein are ferroelectric perovskites characterized as having a band gap, Egap, of less than 2.5 eV. Also disclosed are compounds comprising a solid solution of KNbO3 and BaNi1/2Nb1/2O3-delta, wherein delta is in the range of from 0 to about 1. The specification also discloses photovoltaic devices comprising...
Published: 2/20/2025   |   Inventor(s): Jonathan Spanier, Andrew Rappe, Peter Davies, Ilya Grinberg, Don West
Keywords(s):  
Category(s): Energy, Advanced Materials & Chemicals, Clean Tech & Sustainability