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Narrow-Bandgap Zero-Dimensional Chiral Hybrid Perovskites
Zhongyuan Li1,2, Haitao Zhao1, Jiasheng Xie3
1Key Laboratory of Functional Molecular Solids, Ministry of Education, and College of Chemistry and Materials Science, Anhui Normal University, 241000Wuhu, China.
Journal of the American Chemical Society
|July 27, 2026
Summary
Researchers developed narrow-bandgap zero-dimensional chiral hybrid perovskites using platinum. These materials overcome the bandgap widening issue, enabling applications in chiroptronics and X-ray detection.
Area of Science:
- Materials Science
- Solid-State Physics
- Chirality in Materials
Background:
- Chiral hybrid perovskites (CHPs) are promising for optoelectronics and spintronics.
- Bulky chiral groups typically reduce dimensionality and widen the bandgap, limiting applications.
Purpose of the Study:
- To construct narrow-bandgap zero-dimensional (0D) CHPs.
- To overcome the trade-off between chirality and bandgap widening in CHPs.
Main Methods:
- Incorporation of a 5d transition metal, Pt(IV), into a chiral hybrid structure.
- Synthesis of (R/S-MBA)2PtI6 (MBA = methylbenzylammonium) zero-dimensional chiral hybrid perovskites.
- Electronic structure calculations and characterization of material properties.
Main Results:
- Achieved a narrow band gap of 1.27 eV in (R/S-MBA)2PtI6, a low value for chiral systems.
- Observed broadband photoresponse and high polarization selectivity (g = 0.26).
- Demonstrated sensitive X-ray detection with high sensitivity (1410.8 μC Gy⁻¹ cm⁻²) and low detection limit (426.7 nGy s⁻¹).
Conclusions:
- Hydrogen-bonding-regulated 5d orbital-energy alignment effectively overcomes bandgap widening in CHPs.
- Developed a strategy for designing narrow-bandgap CHPs with integrated chiroptical and X-ray sensing properties.
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