Issue 47, 2023

Simultaneous improvement of polarization and bandgap by finite solid solution engineering

Abstract

A narrow-bandgap-induced potential field always results in decreased photovoltaic performance. Here, a finite solid solution was designed to explore the simultaneous improvement of the polarization property and bandgap obtained from the critical effect in which BiMnO3 (BM) enters the Na0.5Bi0.5TiO3 (NBT) crystal lattice, resulting in a strong lattice expansion; by contrast, the incorporation of Mn without a d-orbital weakened the orbital hybridization accompanied by Jahn–Teller (J–T) distortion to reduce the optical bandgap. A narrow bandgap of 2.90 eV and polarization of 65.9 μC cm−2 were achieved by finite solid solution engineering. The open-circuit voltage and the short-circuit current with a BM doping component of 0.04 reached as high as 1.1 V and 0.0132 mA cm−2, respectively. This work provides an optimized strategy for the mutual benefit of the polarization and bandgap by finite solid solution engineering.

Graphical abstract: Simultaneous improvement of polarization and bandgap by finite solid solution engineering

Article information

Article type
Paper
Submitted
14 Sep 2023
Accepted
08 Nov 2023
First published
10 Nov 2023

Phys. Chem. Chem. Phys., 2023,25, 32372-32377

Simultaneous improvement of polarization and bandgap by finite solid solution engineering

F. Guo, R. Liu, S. Guo, Y. Liu, L. Gao and S. Zhao, Phys. Chem. Chem. Phys., 2023, 25, 32372 DOI: 10.1039/D3CP04456D

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