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Related Experiment Video

Updated: Jul 12, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Published on: November 30, 2012

Simultaneous improvement of polarization and bandgap by finite solid solution engineering.

Fei Guo¹, Rui Liu², Siyuan Guo¹

¹School of Science, Inner Mongolia University of Technology, Hohhot, 010051, P. R. China. applegf123@sina.com.

Physical Chemistry Chemical Physics : PCCP

|November 22, 2023

Summary

Finite solid solution engineering simultaneously improved polarization and bandgap in materials. This approach enhances photovoltaic performance by optimizing both properties for better energy conversion.

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Area of Science:

Materials Science
Solid-State Chemistry
Photovoltaics

Background:

Narrow bandgaps typically decrease photovoltaic performance.
Optimizing both polarization and bandgap is crucial for advanced energy materials.

Purpose of the Study:

To design a finite solid solution for simultaneous improvement of polarization and bandgap.
To investigate the critical effect of BiMnO3 (BM) incorporation into Na0.5Bi0.5TiO3 (NBT).

Main Methods:

Finite solid solution engineering.
Incorporation of BiMnO3 into the Na0.5Bi0.5TiO3 crystal lattice.
Analysis of lattice expansion, orbital hybridization, and Jahn-Teller distortion.

Main Results:

Achieved a narrow bandgap of 2.90 eV and polarization of 65.9 μC cm⁻².
BM doping (0.04) resulted in open-circuit voltage of 1.1 V and short-circuit current of 0.0132 mA cm⁻².
Observed strong lattice expansion and reduced optical bandgap due to J-T distortion.

Conclusions:

Finite solid solution engineering offers an optimized strategy for enhancing polarization and bandgap.
Demonstrated a method for mutual benefit of polarization and bandgap in materials for photovoltaic applications.