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Updated: Sep 6, 2025
08:12
Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
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Optical Properties of Perovskite-Organic Multiple Quantum Wells
Tobias Antrack1, Martin Kroll1, Markas Sudzius1
1Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden, Nöthnitzer Str. 61, 01187, Dresden, Germany.
Summary
Cesium lead bromide perovskite multiple quantum wells exhibit enhanced light emission and low lasing thresholds. These CsPbBr3 (MQW) structures show significant potential for efficient perovskite-based LEDs and lasers.
Area of Science:
- Materials Science
- Optoelectronics
- Quantum Optics
Background:
- Perovskite materials offer unique optoelectronic properties.
- Controlling quantum confinement in perovskite structures is key for advanced devices.
Purpose of the Study:
- To investigate the optical properties of CsPbBr3 perovskite multiple quantum wells (MQW).
- To explore the impact of quantum confinement on emission intensity and amplified spontaneous emission (ASE) thresholds.
Main Methods:
- Fabrication of CsPbBr3 perovskite MQW with organic barrier layers.
- Spectroscopic analysis of absorption and emission spectra.
- Measurement of photoluminescence quantum yield (PLQY) and ASE thresholds.
Main Results:
- Observed quantum confinement effects with blue-shifted spectra correlating with decreasing well width.
- Achieved a 32-fold increase in photoluminescence quantum yield compared to bulk CsPbBr3.
- Demonstrated very low ASE thresholds as low as 7.3 µJ cm⁻² for thin CsPbBr3 layers.
Conclusions:
- CsPbBr3 MQW structures exhibit enhanced photoluminescence efficiency due to quantum confinement.
- The low ASE thresholds make these structures promising for high-performance optoelectronic devices.
- MQW designs are crucial for advancing perovskite-based light-emitting diodes (LEDs) and lasers.
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