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Ultrastable and high-performance amplified spontaneous emission in centimeter-scale inorganic CsPbBr3 single-crystal thin films.
- Source :
- Applied Physics Letters; 1/22/2024, Vol. 124 Issue 4, p1-8, 8p
- Publication Year :
- 2024
-
Abstract
- In this work, high-quality and centimeter-scale CsPbBr<subscript>3</subscript> perovskite single-crystal thin films were grown using the metal-organic chemical vapor deposition method. Extremely flat surfaces without distinct grain boundaries were observed throughout the thin films. A high polarized degree of approximately 0.52 was measured from the single-crystal thin films by analyzing the polarization of the photoluminescence emission spectra. Low threshold amplified spontaneous emissions with an optical gain coefficient of 1215 cm<superscript>−1</superscript> under the excitation energy of 301 μJ/cm<superscript>2</superscript> and the highest value of 2857 cm<superscript>−1</superscript> under the excitation energy of 1.08 mJ/cm<superscript>2</superscript> were investigated under the excitation of a nanosecond laser at 266 nm. The CsPbBr<subscript>3</subscript> single-crystal thin films showed excellent stability where the optical gain coefficient could be maintained over 1800 cm<superscript>−1</superscript> after exposure to air for ten months. The results of this study not only provide high-quality single-crystal films for laser applications but also put forward a feasible scheme to improve the stability of the materials. [ABSTRACT FROM AUTHOR]
- Subjects :
- THIN films
CHEMICAL vapor deposition
CRYSTAL grain boundaries
SOLAR cells
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 124
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 175035714
- Full Text :
- https://doi.org/10.1063/5.0186185